/* ============================================================
   XSS HANDBOOK — COMPLETE STYLESHEET
   ============================================================ */

/* ========== RESET & ROOT ========== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6c63ff;
    --primary-dark: #5a52d5;
    --primary-light: rgba(108, 99, 255, 0.15);
    --secondary: #f50057;
    --success: #00c853;
    --success-light: rgba(0, 200, 83, 0.15);
    --warning: #ff6d00;
    --warning-light: rgba(255, 109, 0, 0.15);
    --danger: #d50000;
    --danger-light: rgba(213, 0, 0, 0.15);
    --dark: #07070f;
    --dark2: #0e0e1a;
    --dark3: #151525;
    --dark4: #1c1c30;
    --dark5: #23233d;
    --card: #12122a;
    --card2: #1a1a30;
    --border: #2a2a4a;
    --border2: #363660;
    --text: #c8c8e8;
    --text-muted: #7070a0;
    --text-bright: #ffffff;
    --text-dim: #4a4a70;
    --code-bg: #09091a;
    --green: #00ff88;
    --green-dim: #00cc66;
    --red: #ff4444;
    --red-dim: #cc2222;
    --yellow: #ffcc00;
    --yellow-dim: #cc9900;
    --blue: #4488ff;
    --blue-dim: #2255cc;
    --cyan: #00ddff;
    --cyan-dim: #00aacc;
    --orange: #ff8800;
    --orange-dim: #cc6600;
    --pink: #ff44aa;
    --purple: #aa44ff;

    --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', 'Courier New', monospace;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 30px rgba(108,99,255,0.3);

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--dark2); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary-dark); }

/* ========== BASE ========== */
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-main);
    background: var(--dark);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; transition: var(--transition-fast); }
a:hover { color: var(--cyan); }

strong { color: var(--text-bright); font-weight: 700; }
em { color: var(--yellow); font-style: normal; }

code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--dark4);
    color: var(--cyan);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

/* ========== SELECTION ========== */
::selection { background: rgba(108,99,255,0.4); color: white; }

/* ======================================================
   NAVBAR
   ====================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 68px;
    background: rgba(7, 7, 15, 0.92);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 20px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.nav-logo-shield {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--primary), #9b59ff);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 12px rgba(108,99,255,0.4);
}

.nav-logo-text {
    font-size: 1.15rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff 0%, var(--primary) 50%, var(--cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

.nav-spacer { flex: 1; }

.nav-handbook-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 16px;
    background: linear-gradient(135deg, rgba(108,99,255,0.2), rgba(0,221,255,0.1));
    border: 1px solid rgba(108,99,255,0.5);
    border-radius: 8px;
    color: var(--text-bright);
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.nav-handbook-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(108,99,255,0.3), rgba(0,221,255,0.2));
    opacity: 0;
    transition: var(--transition);
}

.nav-handbook-btn:hover {
    border-color: var(--primary);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(108,99,255,0.4);
}

.nav-handbook-btn:hover::before { opacity: 1; }

.nav-handbook-btn .btn-icon {
    font-size: 1rem;
    z-index: 1;
    position: relative;
}

.nav-handbook-btn span {
    z-index: 1;
    position: relative;
}

.nav-handbook-btn .external-icon {
    font-size: 0.75rem;
    opacity: 0.7;
    z-index: 1;
    position: relative;
}

.nav-progress-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.nav-progress-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.nav-progress-track {
    width: 180px;
    height: 4px;
    background: var(--dark5);
    border-radius: 2px;
    overflow: hidden;
}

.nav-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--cyan));
    border-radius: 2px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    width: 0%;
    position: relative;
}

.nav-progress-fill::after {
    content: '';
    position: absolute;
    right: 0;
    top: -2px;
    width: 8px;
    height: 8px;
    background: var(--cyan);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--cyan);
}

.nav-menu-btn {
    display: none;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 1.1rem;
    padding: 7px 10px;
    cursor: pointer;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.nav-menu-btn:hover { border-color: var(--primary); color: var(--primary); }

/* ======================================================
   SIDEBAR
   ====================================================== */
.sidebar {
    position: fixed;
    left: 0;
    top: 68px;
    bottom: 0;
    width: 290px;
    background: var(--dark2);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    z-index: 900;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.sidebar-logo-area {
    padding: 18px 20px 12px;
    border-bottom: 1px solid var(--border);
}

.sidebar-completion {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.sidebar-completion-text {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.sidebar-completion-pct {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary);
}

.sidebar-progress {
    height: 3px;
    background: var(--dark5);
    border-radius: 2px;
    overflow: hidden;
}

.sidebar-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--cyan));
    border-radius: 2px;
    transition: width 0.6s ease;
    width: 0%;
}

.sidebar-section-label {
    padding: 14px 20px 6px;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 2.5px;
    color: var(--text-dim);
    font-weight: 700;
}

.sidebar-nav { padding: 6px 12px; flex: 1; }

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 12px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    margin-bottom: 3px;
    position: relative;
}

.sidebar-item:hover {
    background: var(--dark4);
    border-color: var(--border);
}

.sidebar-item.active {
    background: var(--primary-light);
    border-color: rgba(108,99,255,0.4);
}

.sidebar-item .s-icon {
    width: 34px;
    height: 34px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    transition: var(--transition);
}

.sidebar-item.active .s-icon {
    box-shadow: 0 2px 8px rgba(108,99,255,0.4);
}

.sidebar-item .s-text {
    flex: 1;
    min-width: 0;
}

.sidebar-item .s-text .s-title {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: var(--transition-fast);
}

.sidebar-item.active .s-text .s-title { color: var(--primary); }

.sidebar-item .s-text .s-sub {
    font-size: 0.72rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-item .s-check {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--border2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    flex-shrink: 0;
    transition: var(--transition);
    color: transparent;
}

.sidebar-item.completed .s-check {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

/* ======================================================
   MAIN CONTENT
   ====================================================== */
.main-wrap {
    margin-left: 290px;
    margin-top: 68px;
    min-height: calc(100vh - 68px);
}

/* ======================================================
   PAGES
   ====================================================== */
.page {
    display: none;
    padding: 48px 48px 80px;
    max-width: 1160px;
    animation: pageEnter 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.page.active { display: block; }

@keyframes pageEnter {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ======================================================
   PAGE HEADER
   ====================================================== */
.page-header {
    margin-bottom: 48px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
    position: relative;
}

.page-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), transparent);
}

.chapter-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 16px;
}

.badge-intro    { background: rgba(108,99,255,0.15); color: var(--primary);  border: 1px solid rgba(108,99,255,0.35); }
.badge-concept  { background: rgba(0,221,255,0.12);  color: var(--cyan);     border: 1px solid rgba(0,221,255,0.3);  }
.badge-attack   { background: rgba(255,68,68,0.12);  color: var(--red);      border: 1px solid rgba(255,68,68,0.3);  }
.badge-attack2  { background: rgba(255,109,0,0.12);  color: var(--orange);   border: 1px solid rgba(255,109,0,0.3);  }
.badge-other    { background: rgba(170,68,255,0.12); color: var(--purple);   border: 1px solid rgba(170,68,255,0.3); }
.badge-defense  { background: rgba(0,200,83,0.12);   color: var(--success);  border: 1px solid rgba(0,200,83,0.3);  }
.badge-detect   { background: rgba(255,204,0,0.12);  color: var(--yellow);   border: 1px solid rgba(255,204,0,0.3); }

.page-title {
    font-size: 2.6rem;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-bright) 0%, rgba(200,200,230,0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.page-subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
    line-height: 1.65;
    max-width: 720px;
}

/* ======================================================
   SECTION HEADINGS
   ====================================================== */
.section-heading {
    font-size: 1.45rem;
    font-weight: 800;
    color: var(--text-bright);
    margin: 48px 0 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: -0.3px;
}

.section-heading .sh-icon {
    font-size: 1.3rem;
}

.section-heading::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border2), transparent);
}

.sub-heading {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    margin: 28px 0 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sub-heading .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
}

.body-text {
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--text-muted);
    margin-bottom: 16px;
}

/* ======================================================
   HERO SECTION
   ====================================================== */
.hero {
    position: relative;
    text-align: center;
    padding: 70px 40px;
    border-radius: var(--radius-xl);
    margin-bottom: 50px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, rgba(108,99,255,0.18) 0%, transparent 70%),
        radial-gradient(ellipse 60% 40% at 80% 80%, rgba(0,221,255,0.08) 0%, transparent 60%),
        linear-gradient(180deg, var(--dark3) 0%, var(--dark2) 100%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(108,99,255,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(108,99,255,0.06) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 100% 100% at 50% 50%, black 30%, transparent 80%);
}

.hero-content { position: relative; z-index: 1; }

.hero-emoji {
    font-size: 5.5rem;
    display: block;
    margin-bottom: 18px;
    filter: drop-shadow(0 8px 24px rgba(108,99,255,0.4));
    animation: heroFloat 4s ease-in-out infinite;
}

@keyframes heroFloat {
    0%, 100% { transform: translateY(0) rotate(-3deg); }
    50%       { transform: translateY(-12px) rotate(3deg); }
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 14px;
    background: linear-gradient(135deg, #fff 0%, var(--primary) 40%, var(--cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 580px;
    margin: 0 auto 28px;
    line-height: 1.65;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--primary), #9b59ff);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(108,99,255,0.4);
}

.hero-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(108,99,255,0.5);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 0;
    margin-top: 40px;
    flex-wrap: wrap;
}

.hero-stat {
    padding: 16px 30px;
    border-right: 1px solid var(--border);
    text-align: center;
}

.hero-stat:last-child { border-right: none; }

.hero-stat-num {
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.hero-stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 4px;
    display: block;
}

/* ======================================================
   CARDS
   ====================================================== */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: var(--border2);
    box-shadow: var(--shadow-md);
}

.card-accent { border-top: 3px solid var(--primary); }
.card-accent-red { border-top: 3px solid var(--red); }
.card-accent-green { border-top: 3px solid var(--success); }
.card-accent-orange { border-top: 3px solid var(--orange); }
.card-accent-cyan { border-top: 3px solid var(--cyan); }
.card-accent-purple { border-top: 3px solid var(--purple); }
.card-accent-yellow { border-top: 3px solid var(--yellow); }

.card-glow {
    box-shadow: inset 0 1px 0 rgba(108,99,255,0.15), 0 0 30px rgba(108,99,255,0.05);
}

.card-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: 16px;
}

.card-title .ct-icon {
    width: 36px;
    height: 36px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

/* ======================================================
   INFO BOXES
   ====================================================== */
.info-box {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin: 16px 0;
    font-size: 0.9rem;
    line-height: 1.6;
}

.info-box .ib-icon { font-size: 1.3rem; flex-shrink: 0; margin-top: 1px; }
.info-box .ib-content { flex: 1; }
.info-box .ib-content p { color: var(--text-muted); margin-top: 4px; font-size: 0.88rem; }

.info-box.info    { background: rgba(68,136,255,0.08);  border: 1px solid rgba(68,136,255,0.25);   border-left: 3px solid var(--blue); }
.info-box.warning { background: rgba(255,109,0,0.08);   border: 1px solid rgba(255,109,0,0.25);    border-left: 3px solid var(--orange); }
.info-box.danger  { background: rgba(213,0,0,0.08);     border: 1px solid rgba(213,0,0,0.25);      border-left: 3px solid var(--red); }
.info-box.success { background: rgba(0,200,83,0.08);    border: 1px solid rgba(0,200,83,0.25);     border-left: 3px solid var(--success); }
.info-box.purple  { background: rgba(108,99,255,0.08);  border: 1px solid rgba(108,99,255,0.25);   border-left: 3px solid var(--primary); }
.info-box.yellow  { background: rgba(255,204,0,0.08);   border: 1px solid rgba(255,204,0,0.25);    border-left: 3px solid var(--yellow); }

/* ======================================================
   CODE BLOCKS
   ====================================================== */
.code-block {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin: 16px 0;
    overflow: hidden;
    position: relative;
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: rgba(255,255,255,0.03);
    border-bottom: 1px solid var(--border);
}

.code-dots { display: flex; gap: 6px; }
.code-dots .d { width: 11px; height: 11px; border-radius: 50%; }
.d-red    { background: #ff5f57; }
.d-yellow { background: #febc2e; }
.d-green  { background: #28c840; }

.code-lang {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 600;
}

.code-copy-btn {
    padding: 3px 10px;
    background: transparent;
    border: 1px solid var(--border2);
    border-radius: 5px;
    color: var(--text-muted);
    font-size: 0.72rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.code-copy-btn:hover { background: var(--primary); color: white; border-color: var(--primary); }

.code-body {
    padding: 20px 24px;
    font-family: var(--font-mono);
    font-size: 0.84rem;
    line-height: 1.75;
    overflow-x: auto;
    white-space: pre;
    color: var(--text);
    tab-size: 4;
}

/* Syntax Colors */
.c-comment  { color: #5c6370; font-style: italic; }
.c-keyword  { color: #c678dd; }
.c-string   { color: #98c379; }
.c-number   { color: #d19a66; }
.c-func     { color: #61afef; }
.c-tag      { color: #e06c75; }
.c-attr     { color: #d19a66; }
.c-var      { color: #e5c07b; }
.c-const    { color: #56b6c2; }
.c-operator { color: #56b6c2; }
.c-danger   { color: var(--red); background: rgba(255,68,68,0.1); padding: 1px 4px; border-radius: 3px; }
.c-safe     { color: var(--green); background: rgba(0,255,136,0.08); padding: 1px 4px; border-radius: 3px; }
.c-highlight{ background: rgba(108,99,255,0.15); border-radius: 3px; padding: 1px 4px; }

/* ======================================================
   GRIDS
   ====================================================== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 20px 0; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; margin: 20px 0; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 20px 0; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin: 20px 0; }

/* ======================================================
   TABLES
   ====================================================== */
.tbl-wrap {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    margin: 16px 0;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.data-table th {
    background: var(--dark4);
    padding: 12px 16px;
    text-align: left;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    font-weight: 700;
    border-bottom: 1px solid var(--border2);
    white-space: nowrap;
}

.data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
    color: var(--text);
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--dark3); }

.data-table th:first-child,
.data-table td:first-child { padding-left: 20px; }

.check-yes  { color: var(--success); font-weight: 700; }
.check-no   { color: var(--red); font-weight: 700; }
.check-mid  { color: var(--yellow); font-weight: 700; }

/* ======================================================
   TAGS & BADGES
   ====================================================== */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.tag-red    { background: rgba(255,68,68,0.18);   color: var(--red);     border: 1px solid rgba(255,68,68,0.3); }
.tag-green  { background: rgba(0,255,136,0.12);   color: var(--green);   border: 1px solid rgba(0,255,136,0.25); }
.tag-yellow { background: rgba(255,204,0,0.15);   color: var(--yellow);  border: 1px solid rgba(255,204,0,0.3); }
.tag-blue   { background: rgba(68,136,255,0.15);  color: var(--blue);    border: 1px solid rgba(68,136,255,0.3); }
.tag-purple { background: rgba(108,99,255,0.18);  color: var(--primary); border: 1px solid rgba(108,99,255,0.3); }
.tag-orange { background: rgba(255,136,0,0.15);   color: var(--orange);  border: 1px solid rgba(255,136,0,0.3); }
.tag-cyan   { background: rgba(0,221,255,0.12);   color: var(--cyan);    border: 1px solid rgba(0,221,255,0.25); }
.tag-pink   { background: rgba(255,68,170,0.12);  color: var(--pink);    border: 1px solid rgba(255,68,170,0.25); }
.tag-gray   { background: rgba(100,100,130,0.2);  color: var(--text-muted); border: 1px solid var(--border); }

.severity-critical { background: rgba(213,0,0,0.2);   color: #ff6666; border: 1px solid rgba(213,0,0,0.4); padding: 4px 12px; border-radius: 20px; font-size: 0.72rem; font-weight: 700; }
.severity-high     { background: rgba(255,109,0,0.2); color: var(--orange); border: 1px solid rgba(255,109,0,0.4); padding: 4px 12px; border-radius: 20px; font-size: 0.72rem; font-weight: 700; }
.severity-medium   { background: rgba(255,204,0,0.2); color: var(--yellow); border: 1px solid rgba(255,204,0,0.4); padding: 4px 12px; border-radius: 20px; font-size: 0.72rem; font-weight: 700; }
.severity-low      { background: rgba(68,136,255,0.2);color: var(--blue);   border: 1px solid rgba(68,136,255,0.4); padding: 4px 12px; border-radius: 20px; font-size: 0.72rem; font-weight: 700; }

/* ======================================================
   BUTTONS
   ====================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #9b59ff);
    color: white;
    box-shadow: 0 3px 14px rgba(108,99,255,0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 22px rgba(108,99,255,0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border2);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.btn-success { background: linear-gradient(135deg, #00c853, #00a040); color: white; }
.btn-danger  { background: linear-gradient(135deg, #d50000, #b00000); color: white; }

/* ======================================================
   PAGE NAVIGATION
   ====================================================== */
.page-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid var(--border);
    gap: 16px;
}

/* ======================================================
   FLOW DIAGRAMS
   ====================================================== */
.flow-container {
    background: var(--dark3);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 30px;
    margin: 20px 0;
    overflow-x: auto;
}

.flow-horizontal {
    display: flex;
    align-items: center;
    gap: 0;
    min-width: min-content;
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.flow-box {
    padding: 12px 18px;
    border-radius: var(--radius-md);
    font-size: 0.82rem;
    font-weight: 600;
    text-align: center;
    min-width: 110px;
    max-width: 140px;
    border: 1px solid transparent;
}

.flow-box-attacker { background: rgba(213,0,0,0.18);   color: var(--red);     border-color: rgba(213,0,0,0.35); }
.flow-box-victim   { background: rgba(68,136,255,0.15); color: var(--blue);    border-color: rgba(68,136,255,0.3); }
.flow-box-server   { background: rgba(0,200,83,0.12);   color: var(--success); border-color: rgba(0,200,83,0.25); }
.flow-box-browser  { background: rgba(255,204,0,0.12);  color: var(--yellow);  border-color: rgba(255,204,0,0.25); }
.flow-box-db       { background: rgba(108,99,255,0.15); color: var(--primary); border-color: rgba(108,99,255,0.3); }
.flow-box-result   { background: rgba(255,68,170,0.12); color: var(--pink);    border-color: rgba(255,68,170,0.25); }

.flow-step-num {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 800;
    color: white;
}

.flow-step-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
    max-width: 120px;
    line-height: 1.3;
}

.flow-arrow {
    font-size: 1.4rem;
    color: var(--text-dim);
    padding: 0 6px;
    flex-shrink: 0;
    align-self: center;
    padding-bottom: 20px;
}

/* Attack steps - vertical */
.attack-steps { display: flex; flex-direction: column; gap: 12px; }

.attack-step {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 16px 20px;
    background: var(--dark4);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    border-left: 3px solid var(--primary);
    transition: var(--transition);
}

.attack-step:hover { border-color: var(--border2); border-left-color: var(--primary); background: var(--dark5); }

.attack-step .as-num {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #9b59ff);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
    color: white;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(108,99,255,0.4);
}

.attack-step .as-emoji { font-size: 1.4rem; flex-shrink: 0; margin-top: 2px; }

.attack-step .as-content h4 { font-size: 0.92rem; font-weight: 700; color: var(--text-bright); margin-bottom: 4px; }
.attack-step .as-content p  { font-size: 0.82rem; color: var(--text-muted); line-height: 1.5; }

/* ======================================================
   XSS TYPE CARDS (hero cards on intro page)
   ====================================================== */
.xss-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 26px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.xss-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.xss-card.reflected::before { background: linear-gradient(90deg, var(--orange), var(--yellow)); }
.xss-card.stored::before    { background: linear-gradient(90deg, var(--red), var(--pink)); }
.xss-card.dom::before       { background: linear-gradient(90deg, var(--cyan), var(--primary)); }
.xss-card.self-xss::before  { background: linear-gradient(90deg, var(--purple), var(--pink)); }
.xss-card.blind::before     { background: linear-gradient(90deg, var(--text-muted), var(--border2)); }

.xss-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border2);
}

.xss-card-icon {
    width: 58px;
    height: 58px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 16px;
}

.xss-card h3 {
    font-size: 1.05rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.xss-card p {
    font-size: 0.83rem;
    color: var(--text-muted);
    line-height: 1.55;
    margin-bottom: 14px;
}

.xss-card-tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* ======================================================
   STAT CARDS
   ====================================================== */
.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 22px 20px;
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover { border-color: var(--border2); }

.stat-num {
    font-size: 2.4rem;
    font-weight: 900;
    display: block;
    margin-bottom: 6px;
    background: linear-gradient(135deg, var(--primary), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    line-height: 1.4;
}

/* ======================================================
   TIMELINE
   ====================================================== */
.timeline { position: relative; padding-left: 32px; }

.timeline::before {
    content: '';
    position: absolute;
    left: 9px;
    top: 6px;
    bottom: 6px;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), transparent);
}

.timeline-item {
    position: relative;
    margin-bottom: 28px;
    transition: var(--transition);
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-item::before {
    content: '';
    position: absolute;
    left: -27px;
    top: 5px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--dark);
    border: 2.5px solid var(--primary);
    box-shadow: 0 0 10px rgba(108,99,255,0.4);
    transition: var(--transition);
}

.timeline-item:hover::before { background: var(--primary); }

.timeline-year {
    font-size: 0.72rem;
    color: var(--primary);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.timeline-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: 4px;
}

.timeline-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.55;
}

/* ======================================================
   SOURCE → SINK VISUAL
   ====================================================== */
.source-sink-diagram {
    display: flex;
    gap: 20px;
    align-items: stretch;
    padding: 24px;
    background: var(--dark3);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin: 16px 0;
    flex-wrap: wrap;
}

.ss-column {
    flex: 1;
    min-width: 160px;
}

.ss-column-title {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 800;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.ss-source .ss-column-title { color: var(--orange); }
.ss-sink   .ss-column-title { color: var(--red); }

.ss-item {
    padding: 7px 12px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    margin-bottom: 6px;
    transition: var(--transition-fast);
    cursor: default;
}

.ss-source .ss-item { background: rgba(255,136,0,0.12); color: var(--orange); border: 1px solid rgba(255,136,0,0.2); }
.ss-sink   .ss-item { background: rgba(255,68,68,0.12);  color: var(--red);    border: 1px solid rgba(255,68,68,0.2); }

.ss-item:hover { transform: translateX(3px); }

.ss-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 0 10px;
    color: var(--text-muted);
    font-size: 0.72rem;
    text-align: center;
}

.ss-arrow .arrow-symbol {
    font-size: 2rem;
    background: linear-gradient(180deg, var(--orange), var(--red));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ======================================================
   TABS
   ====================================================== */
.tabs { margin: 20px 0; }

.tab-nav {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border);
    overflow-x: auto;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 10px 20px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-muted);
    border: none;
    background: transparent;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }

.tab-pane { display: none; padding: 20px 0; }
.tab-pane.active { display: block; }

/* ======================================================
   HINT SYSTEM
   ====================================================== */
.hint-wrapper { margin: 16px 0; }

.hint-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: rgba(255,204,0,0.08);
    border: 1px solid rgba(255,204,0,0.25);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--yellow);
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition-fast);
    user-select: none;
    width: 100%;
}

.hint-toggle:hover { background: rgba(255,204,0,0.15); }

.hint-toggle .hint-chevron { margin-left: auto; transition: transform 0.3s; }
.hint-toggle.open .hint-chevron { transform: rotate(180deg); }

.hint-body {
    display: none;
    background: rgba(255,204,0,0.04);
    border: 1px solid rgba(255,204,0,0.2);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    padding: 18px;
}

.hint-body.visible { display: block; }

.hint-item {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 0.87rem;
    line-height: 1.55;
    color: var(--text-muted);
}

.hint-item:last-child { margin-bottom: 0; }

.hint-item .hint-num {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(255,204,0,0.2);
    color: var(--yellow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    font-weight: 800;
    flex-shrink: 0;
    margin-top: 1px;
}

/* ======================================================
   LAB SECTION
   ====================================================== */
.lab-container {
    background: linear-gradient(135deg, rgba(108,99,255,0.04), rgba(0,221,255,0.03));
    border: 2px solid rgba(108,99,255,0.35);
    border-radius: var(--radius-xl);
    margin-top: 48px;
    overflow: hidden;
    box-shadow: 0 0 40px rgba(108,99,255,0.08);
}

.lab-banner {
    background: linear-gradient(135deg, rgba(108,99,255,0.18) 0%, rgba(0,221,255,0.08) 100%);
    padding: 22px 28px;
    display: flex;
    align-items: center;
    gap: 16px;
    border-bottom: 1px solid rgba(108,99,255,0.2);
}

.lab-banner-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--primary), #9b59ff);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    flex-shrink: 0;
    box-shadow: 0 4px 16px rgba(108,99,255,0.4);
}

.lab-banner-text { flex: 1; }
.lab-banner-text h3 { font-size: 1.15rem; font-weight: 800; color: var(--text-bright); margin-bottom: 4px; }
.lab-banner-text p  { font-size: 0.83rem; color: var(--text-muted); }

.lab-difficulty {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
    flex-shrink: 0;
}

.lab-diff-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
}

.diff-dots { display: flex; gap: 4px; }
.diff-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
}

.diff-dot.active-easy   { background: var(--success); box-shadow: 0 0 6px var(--success); }
.diff-dot.active-medium { background: var(--yellow);  box-shadow: 0 0 6px var(--yellow); }
.diff-dot.active-hard   { background: var(--red);     box-shadow: 0 0 6px var(--red); }

.lab-body { padding: 28px; }

.lab-objective {
    background: var(--dark4);
    border-left: 3px solid var(--primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 14px 18px;
    margin-bottom: 22px;
}

.lab-objective-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--primary);
    font-weight: 800;
    margin-bottom: 6px;
}

.lab-objective p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Browser mock */
.lab-browser {
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin: 20px 0;
    box-shadow: var(--shadow-md);
}

.browser-chrome {
    background: var(--dark3);
    padding: 10px 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border);
}

.browser-dots { display: flex; gap: 5px; }
.browser-dot  { width: 11px; height: 11px; border-radius: 50%; }
.bd-close  { background: #ff5f57; }
.bd-min    { background: #febc2e; }
.bd-max    { background: #28c840; }

.browser-url-bar {
    flex: 1;
    background: var(--dark5);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 5px 12px;
    font-size: 0.78rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.browser-url-bar .url-lock { color: var(--success); font-size: 0.75rem; }
.browser-url-bar .url-text { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.browser-content {
    background: #f0f2f5;
    padding: 0;
    min-height: 200px;
    font-family: Arial, Helvetica, sans-serif;
    color: #333;
}

/* Lab panel grid */
.lab-panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 20px 0;
}

.lab-panel {
    background: var(--dark3);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.lab-panel-header {
    background: var(--dark4);
    padding: 10px 16px;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    font-weight: 700;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.lab-panel-body { padding: 16px; }

.lab-textarea {
    width: 100%;
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px;
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.83rem;
    resize: vertical;
    min-height: 80px;
    transition: border-color 0.3s;
    line-height: 1.5;
}

.lab-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(108,99,255,0.15);
}

.lab-input {
    width: 100%;
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    transition: border-color 0.3s;
}

.lab-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(108,99,255,0.15);
}

.lab-output {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.75;
    min-height: 100px;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--text-muted);
}

.lo-safe    { color: var(--green); }
.lo-danger  { color: var(--red); }
.lo-info    { color: var(--cyan); }
.lo-warning { color: var(--yellow); }

/* Lab buttons */
.lab-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 18px;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.lbtn-primary { background: var(--primary); color: white; }
.lbtn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(108,99,255,0.4); }

.lbtn-danger  { background: var(--danger); color: white; }
.lbtn-danger:hover { background: #b00000; transform: translateY(-1px); }

.lbtn-success { background: var(--success); color: white; }
.lbtn-reset   { background: var(--dark5); color: var(--text-muted); border: 1px solid var(--border); }
.lbtn-reset:hover { border-color: var(--primary); color: var(--text); }

/* Quick payloads */
.payload-grid { display: flex; flex-direction: column; gap: 6px; }

.payload-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--dark4);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.payload-item:hover { background: var(--dark5); border-color: var(--primary); }

.pi-code {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--cyan);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pi-label { flex-shrink: 0; }

/* Lab alerts */
.lab-alert {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    margin: 10px 0;
    font-size: 0.88rem;
    line-height: 1.55;
    animation: alertSlide 0.3s ease;
}

@keyframes alertSlide { from { opacity: 0; transform: translateX(-10px); } to { opacity: 1; transform: translateX(0); } }

.la-success { background: rgba(0,200,83,0.12);  border: 1px solid rgba(0,200,83,0.3);  color: var(--success); }
.la-danger  { background: rgba(213,0,0,0.12);   border: 1px solid rgba(213,0,0,0.3);   color: #ff5555; }
.la-warning { background: rgba(255,109,0,0.12); border: 1px solid rgba(255,109,0,0.3); color: var(--orange); }
.la-info    { background: rgba(68,136,255,0.12);border: 1px solid rgba(68,136,255,0.3);color: var(--blue); }

.la-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }

/* ======================================================
   DOM URL DISPLAY
   ====================================================== */
.dom-url-display {
    background: var(--dark4);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--cyan);
    word-break: break-all;
    margin: 10px 0;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.dom-url-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
    flex-shrink: 0;
    margin-top: 2px;
}

/* ======================================================
   MODAL (XSS Simulation)
   ====================================================== */
.xss-modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.75);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.xss-modal-overlay.show { display: flex; }

.xss-modal {
    background: #1a1a2e;
    border: 1px solid rgba(213,0,0,0.4);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 440px;
    width: 90%;
    text-align: center;
    animation: modalPop 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 60px rgba(213,0,0,0.2);
}

@keyframes modalPop {
    from { transform: scale(0.7) translateY(20px); opacity: 0; }
    to   { transform: scale(1) translateY(0); opacity: 1; }
}

.xss-modal-header {
    font-size: 3.5rem;
    margin-bottom: 12px;
    animation: shake 0.4s ease 0.2s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px) rotate(-3deg); }
    75% { transform: translateX(5px) rotate(3deg); }
}

.xss-modal h3 { color: var(--red); font-size: 1.3rem; margin-bottom: 8px; }
.xss-modal p  { color: var(--text-muted); font-size: 0.88rem; line-height: 1.55; margin-bottom: 12px; }

.xss-modal-cookie {
    background: var(--code-bg);
    border: 1px solid rgba(213,0,0,0.3);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--red);
    word-break: break-all;
    text-align: left;
    margin: 12px 0;
}

.xss-modal-close {
    padding: 10px 28px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 700;
    transition: var(--transition);
    margin-top: 8px;
}

.xss-modal-close:hover { background: #b00000; transform: translateY(-1px); }

/* ======================================================
   CHECKLIST
   ====================================================== */
.checklist { list-style: none; }

.checklist li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 9px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.checklist li:last-child { border-bottom: none; }

.cl-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    flex-shrink: 0;
    margin-top: 2px;
    font-weight: 800;
}

.cl-yes  { background: rgba(0,200,83,0.2);   color: var(--success); }
.cl-no   { background: rgba(213,0,0,0.2);    color: var(--red); }
.cl-warn { background: rgba(255,204,0,0.2);  color: var(--yellow); }
.cl-info { background: rgba(68,136,255,0.2); color: var(--blue); }

/* ======================================================
   PREVENTION CARDS
   ====================================================== */
.prevention-card {
    background: var(--dark3);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    border-top: 3px solid var(--success);
    transition: var(--transition);
}

.prevention-card:hover { border-color: var(--success); transform: translateY(-2px); }

.prev-icon {
    width: 42px;
    height: 42px;
    border-radius: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 14px;
}

.prevention-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 6px;
}

.prevention-card p {
    font-size: 0.83rem;
    color: var(--text-muted);
    line-height: 1.55;
}

/* ======================================================
   COMPARISON TABLE (special)
   ====================================================== */
.comparison-wrap {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.comparison-table th {
    padding: 14px 18px;
    text-align: center;
    font-weight: 800;
    font-size: 0.82rem;
    border-bottom: 2px solid var(--border);
    background: var(--dark4);
}

.comparison-table th:first-child { text-align: left; }
.comparison-table td { padding: 13px 18px; border-bottom: 1px solid var(--border); text-align: center; }
.comparison-table td:first-child { text-align: left; font-weight: 600; color: var(--text); }
.comparison-table tr:last-child td { border-bottom: none; }
.comparison-table tr:hover td { background: var(--dark3); }

/* ======================================================
   PAYLOAD SHOWCASE
   ====================================================== */
.payload-showcase .pi-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 16px;
    background: var(--dark3);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 7px;
    transition: var(--transition-fast);
}

.payload-showcase .pi-item:hover { border-color: var(--border2); background: var(--dark4); }
.payload-showcase .pi-code { flex: 1; font-family: var(--font-mono); font-size: 0.8rem; color: var(--cyan); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ======================================================
   SCROLL TO TOP
   ====================================================== */
.scroll-top-btn {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 46px;
    height: 46px;
    background: linear-gradient(135deg, var(--primary), #9b59ff);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 1.1rem;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    box-shadow: 0 4px 16px rgba(108,99,255,0.4);
    z-index: 500;
}

.scroll-top-btn:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(108,99,255,0.5); }
.scroll-top-btn.show  { display: flex; animation: fadeInUp 0.3s ease; }

@keyframes fadeInUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ======================================================
   SPECIAL VISUAL ELEMENTS
   ====================================================== */

/* Glowing separator */
.glow-line {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), var(--cyan), transparent);
    margin: 40px 0;
    opacity: 0.5;
}

/* Feature highlight */
.feature-highlight {
    background: linear-gradient(135deg, rgba(108,99,255,0.08), rgba(0,221,255,0.04));
    border: 1px solid rgba(108,99,255,0.2);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin: 20px 0;
    position: relative;
    overflow: hidden;
}

.feature-highlight::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--cyan));
}

/* Context badge for code */
.context-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* Number steps */
.numbered-steps { counter-reset: steps; }

.numbered-step {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    align-items: flex-start;
}

.numbered-step::before {
    counter-increment: steps;
    content: counter(steps);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-light);
    border: 2px solid var(--primary);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
    flex-shrink: 0;
}

.numbered-step-content h4 { font-size: 0.95rem; font-weight: 700; color: var(--text-bright); margin-bottom: 5px; }
.numbered-step-content p  { font-size: 0.85rem; color: var(--text-muted); line-height: 1.55; }

/* ======================================================
   STORED XSS COMMENT UI
   ====================================================== */
.comment-system {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    font-family: Arial, Helvetica, sans-serif;
    color: #333;
}

.cs-header {
    background: #1877f2;
    padding: 12px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
}

.cs-header .cs-logo { font-weight: 900; font-size: 1rem; }
.cs-header .cs-nav  { display: flex; gap: 12px; font-size: 0.82rem; opacity: 0.85; margin-left: auto; }

.cs-post-area {
    padding: 16px 18px;
    border-bottom: 1px solid #eee;
    background: #f8f9fa;
}

.cs-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    margin-bottom: 8px;
    font-size: 0.88rem;
    font-family: Arial;
    background: white;
}

.cs-textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    margin-bottom: 10px;
    font-size: 0.88rem;
    resize: vertical;
    min-height: 72px;
    font-family: Arial;
}

.cs-post-btn {
    padding: 8px 20px;
    background: #1877f2;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 700;
}

.cs-comments { padding: 12px 18px; max-height: 260px; overflow-y: auto; }

.cs-comment {
    display: flex;
    gap: 10px;
    margin-bottom: 14px;
    padding-bottom: 14px;
    border-bottom: 1px solid #f0f0f0;
}

.cs-comment:last-child { border-bottom: none; margin-bottom: 0; }

.cs-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.85rem;
    color: white;
    flex-shrink: 0;
}

.cs-comment-body { flex: 1; }

.cs-comment-bubble {
    background: #f0f2f5;
    border-radius: 0 12px 12px 12px;
    padding: 8px 12px;
    margin-bottom: 4px;
    display: inline-block;
    max-width: 100%;
}

.cs-comment-name {
    font-weight: 700;
    font-size: 0.82rem;
    color: #1877f2;
    margin-bottom: 3px;
}

.cs-comment-text {
    font-size: 0.85rem;
    word-break: break-word;
}

.cs-comment-time {
    font-size: 0.72rem;
    color: #999;
    margin-left: 4px;
}

/* ======================================================
   BLIND XSS & SELF XSS VISUALS
   ====================================================== */
.xss-type-visual {
    background: var(--dark3);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin: 20px 0;
    position: relative;
    overflow: hidden;
}

.xss-type-visual::before {
    content: attr(data-type);
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-dim);
    font-weight: 700;
}

.scenario-box {
    background: var(--dark4);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px;
    margin: 12px 0;
}

.scenario-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-muted);
    font-weight: 700;
    margin-bottom: 8px;
}

.scenario-actors {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.actor-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.actor-icon {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
}

.actor-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-align: center;
}

.actor-arrow {
    font-size: 1.5rem;
    color: var(--text-dim);
    flex-shrink: 0;
}

/* ======================================================
   RESPONSIVE
   ====================================================== */
@media (max-width: 1100px) {
    .page { padding: 36px 30px 60px; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
    .grid-3 { grid-template-columns: 1fr 1fr; }
    .lab-panels { grid-template-columns: 1fr; }
    .source-sink-diagram { flex-direction: column; }
    .ss-arrow { flex-direction: row; padding: 6px 0; }
}

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-lg); }
    .main-wrap { margin-left: 0; }
    .nav-menu-btn { display: flex; }
    .nav-progress-wrapper { display: none; }
    .page { padding: 20px 18px 50px; }
    .page-title { font-size: 1.9rem; }
    .hero h1 { font-size: 2rem; }
    .hero-emoji { font-size: 3.5rem; }
    .hero-stat { padding: 12px 16px; }
    .grid-2 { grid-template-columns: 1fr; }
    .grid-3 { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: 1fr 1fr; }
    .lab-difficulty { display: none; }
    .hero-stats { gap: 0; }
    .nav-handbook-btn span { display: none; }
    .nav-handbook-btn .external-icon { display: none; }
}

@media (max-width: 480px) {
    .grid-4 { grid-template-columns: 1fr; }
    .page-title { font-size: 1.6rem; }
    .hero h1 { font-size: 1.7rem; }
    .flow-horizontal { flex-direction: column; }
    .flow-arrow { transform: rotate(90deg); }
}

/* ======================================================
   ANIMATIONS & UTILITIES
   ====================================================== */
.fade-in  { animation: fadeIn  0.4s ease forwards; }
.slide-up { animation: slideUp 0.4s ease forwards; }

@keyframes fadeIn  { from { opacity: 0; }                        to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.text-primary  { color: var(--primary); }
.text-red      { color: var(--red); }
.text-green    { color: var(--green); }
.text-yellow   { color: var(--yellow); }
.text-cyan     { color: var(--cyan); }
.text-orange   { color: var(--orange); }
.text-muted    { color: var(--text-muted); }
.text-bright   { color: var(--text-bright); }
.text-center   { text-align: center; }
.text-mono     { font-family: var(--font-mono); }

.mt-0  { margin-top: 0; }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-0  { margin-bottom: 0; }
.mb-8  { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }

.w-full { width: 100%; }
.flex   { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-gap-8  { gap: 8px; }
.flex-gap-12 { gap: 12px; }
.flex-gap-16 { gap: 16px; }
.flex-wrap   { flex-wrap: wrap; }

.hidden { display: none; }

/* ======================================================
   PRINT
   ====================================================== */
@media print {
    .navbar, .sidebar, .scroll-top-btn { display: none; }
    .main-wrap { margin: 0; }
    .page { display: block !important; break-after: page; }
}