/* ============================================================
   SecuBlog - Cybersecurity Blog & Attack Simulation Platform
   Dark Terminal Theme
   ============================================================ */

/* --- CSS Variables --- */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #1c2128;
    --bg-hover: #21262d;
    --border-color: #30363d;
    --border-accent: #3fb950;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent-red: #ff4444;
    --accent-green: #00ff41;
    --accent-blue: #58a6ff;
    --accent-yellow: #f0c040;
    --accent-purple: #bc8cff;
    --accent-orange: #ff8c42;
    --font-mono: 'JetBrains Mono', 'Consolas', 'Courier New', monospace;
    --font-sans: 'JetBrains Mono', system-ui, sans-serif;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-card: 0 2px 12px rgba(0,0,0,0.4);
    --shadow-glow-red: 0 0 20px rgba(255,68,68,0.3);
    --shadow-glow-green: 0 0 20px rgba(0,255,65,0.2);
    --transition: all 0.2s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-mono);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-green);
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

/* --- Matrix Background --- */
#matrix-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.04;
    pointer-events: none;
}

/* --- Container --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Header --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13,17,23,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    flex-shrink: 0;
}

.logo:hover {
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-text {
    letter-spacing: 1px;
}

.logo-text .accent {
    color: var(--accent-red);
}

/* Mobile menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu {
    display: none;
    flex-direction: column;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 8px;
}

.mobile-nav-link {
    padding: 10px 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-decoration: none;
    border-radius: var(--radius-sm);
}

.mobile-nav-link.active,
.mobile-nav-link:hover {
    background: var(--bg-hover);
    color: var(--accent-green);
    text-decoration: none;
}

/* --- Hero Section --- */
.hero {
    text-align: center;
    padding: 80px 20px 60px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(255,68,68,0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 50%, rgba(0,255,65,0.05) 0%, transparent 60%);
    pointer-events: none;
}

.hero-badge {
    display: inline-block;
    padding: 4px 14px;
    border: 1px solid var(--accent-red);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--accent-red);
    margin-bottom: 20px;
    animation: pulse-border 2s ease infinite;
}

@keyframes pulse-border {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255,68,68,0.3); }
    50% { box-shadow: 0 0 0 6px rgba(255,68,68,0); }
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -1px;
    line-height: 1.2;
}

.hero-title .line1 { color: var(--text-primary); }
.hero-title .line2 {
    color: var(--accent-green);
    font-family: var(--font-mono);
}

.hero-title .glitch {
    position: relative;
    display: inline-block;
    animation: glitch 3s infinite;
}

@keyframes glitch {
    0%, 90%, 100% { transform: translate(0); }
    92% { transform: translate(-2px, 1px); color: var(--accent-red); }
    94% { transform: translate(2px, -1px); color: var(--accent-green); }
    96% { transform: translate(-1px, 2px); }
    98% { transform: translate(1px, -2px); color: var(--accent-blue); }
}

.hero-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 30px;
    line-height: 1.8;
}

.hero-tags {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.hero-tag {
    padding: 4px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-card);
}

/* --- Layout Grid --- */
.layout-grid {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 24px;
    align-items: start;
    padding: 24px 0;
}

.content-area {
    min-width: 0;
}

/* --- Cards --- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
}

.card:hover {
    border-color: rgba(0,255,65,0.3);
    box-shadow: var(--shadow-glow-green);
}

/* --- Article Cards --- */
.article-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 16px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.article-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent-red);
    transform: scaleY(0);
    transition: transform 0.2s;
}

.article-card:hover {
    border-color: rgba(255,68,68,0.4);
    background: var(--bg-hover);
    text-decoration: none;
    transform: translateX(4px);
}

.article-card:hover::before {
    transform: scaleY(1);
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.article-category {
    padding: 2px 10px;
    background: rgba(255,68,68,0.12);
    border: 1px solid rgba(255,68,68,0.3);
    border-radius: var(--radius-sm);
    color: var(--accent-red);
    font-size: 0.75rem;
}

.article-views {
    color: var(--text-muted);
}

.article-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
    line-height: 1.4;
}

.article-title::before {
    content: '# ';
    color: var(--accent-green);
    font-weight: 400;
}

.article-excerpt {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.read-more {
    color: var(--accent-green);
    font-size: 0.8rem;
}

/* --- Sidebar --- */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: sticky;
    top: 80px;
}

.sidebar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
}

.sidebar-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    letter-spacing: 0.5px;
}

/* Stats */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.stat-item {
    text-align: center;
    padding: 10px 4px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.stat-num {
    display: block;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-green);
}

.stat-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Attack simulation list */
.sim-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sim-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition);
}

.sim-item:hover {
    text-decoration: none;
    transform: translateX(4px);
    border-color: currentColor;
}

.sim-xss { color: #ff6b6b; border-color: rgba(255,107,107,0.3); }
.sim-xss:hover { background: rgba(255,107,107,0.1); }

.sim-sqli { color: #ffa94d; border-color: rgba(255,169,77,0.3); }
.sim-sqli:hover { background: rgba(255,169,77,0.1); }

.sim-bf { color: #9775fa; border-color: rgba(151,117,250,0.3); }
.sim-bf:hover { background: rgba(151,117,250,0.1); }

.sim-phish { color: #4dabf7; border-color: rgba(77,171,247,0.3); }
.sim-phish:hover { background: rgba(77,171,247,0.1); }

.sim-csrf { color: #69db7c; border-color: rgba(105,219,124,0.3); }
.sim-csrf:hover { background: rgba(105,219,124,0.1); }

.sim-icon {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    background: transparent;
    border: 1px solid currentColor;
    border-radius: 4px;
    border-radius: 3px;
}
.sim-arrow { margin-left: auto; opacity: 0.5; }

/* Tip card */
.tip-card {
    border-color: rgba(240,192,64,0.3);
}

.tip-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.7;
    padding: 10px;
    background: rgba(240,192,64,0.05);
    border-left: 3px solid var(--accent-yellow);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn:hover { text-decoration: none; }

.btn-primary {
    background: var(--accent-red);
    color: #fff;
    box-shadow: 0 0 16px rgba(255,68,68,0.3);
}
.btn-primary:hover {
    background: #ff6666;
    box-shadow: 0 0 24px rgba(255,68,68,0.5);
    color: #fff;
}

.btn-secondary {
    background: var(--bg-hover);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.btn-green {
    background: rgba(0,255,65,0.1);
    color: var(--accent-green);
    border: 1px solid rgba(0,255,65,0.3);
}
.btn-green:hover {
    background: rgba(0,255,65,0.2);
    color: var(--accent-green);
}

.btn-danger {
    background: rgba(255,68,68,0.1);
    color: var(--accent-red);
    border: 1px solid rgba(255,68,68,0.3);
}
.btn-danger:hover {
    background: rgba(255,68,68,0.2);
    color: var(--accent-red);
}

/* --- Form Elements --- */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    transition: var(--transition);
    outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 3px rgba(0,255,65,0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* --- Attack Simulation Page --- */
.sim-page {
    padding: 40px 0;
}

.sim-page-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.sim-page-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 32px;
}

.sim-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 24px;
}

.sim-panel-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
    font-weight: 600;
}

.sim-panel-body {
    padding: 24px;
}

/* Terminal style */
.terminal-window {
    background: #0a0e14;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.terminal-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: #1e2530;
    border-bottom: 1px solid var(--border-color);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }

.terminal-title {
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.terminal-body {
    padding: 16px;
    font-size: 0.875rem;
    min-height: 120px;
    color: #e6e6e6;
    font-family: var(--font-mono);
}

/* Payload buttons */
.payload-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.payload-btn {
    padding: 5px 12px;
    background: rgba(255,68,68,0.1);
    border: 1px solid rgba(255,68,68,0.3);
    border-radius: var(--radius-sm);
    color: var(--accent-red);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.payload-btn:hover {
    background: rgba(255,68,68,0.2);
    color: var(--accent-red);
}

/* Result display */
.result-success {
    background: rgba(0,255,65,0.08);
    border: 1px solid rgba(0,255,65,0.3);
    border-radius: var(--radius-md);
    padding: 16px;
    color: var(--accent-green);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.result-danger {
    background: rgba(255,68,68,0.08);
    border: 1px solid rgba(255,68,68,0.3);
    border-radius: var(--radius-md);
    padding: 16px;
    color: var(--accent-red);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

/* Progress bar */
.progress-bar-wrap {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    height: 24px;
    overflow: hidden;
    margin: 12px 0;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-purple), var(--accent-blue));
    border-radius: var(--radius-sm);
    transition: width 0.05s linear;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 8px;
    font-size: 0.7rem;
    color: #fff;
    font-weight: 600;
    min-width: 40px;
}

/* --- Guestbook --- */
.guestbook-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
}

.guestbook-entry {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    margin-bottom: 12px;
    transition: var(--transition);
}

.guestbook-entry:hover {
    border-color: rgba(0,255,65,0.3);
}

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

.guestbook-nickname {
    font-weight: 600;
    color: var(--accent-blue);
    font-size: 0.875rem;
}

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

.guestbook-content {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* --- Admin --- */
.admin-login {
    max-width: 400px;
    margin: 80px auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.admin-table th,
.admin-table td {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.admin-table th {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 500;
}

.admin-table tr:hover td {
    background: var(--bg-hover);
}

/* --- Article Detail --- */
.article-full {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.article-full h1 {
    font-size: 1.8rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.article-full h2,
.article-full h3,
.article-full h4 {
    margin: 24px 0 12px;
    color: var(--accent-green);
}

.article-full p {
    margin-bottom: 16px;
    line-height: 1.9;
    color: var(--text-secondary);
}

.article-full ul {
    margin: 12px 0 16px 20px;
}

.article-full li {
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.article-full code.inline-code {
    background: rgba(255,68,68,0.1);
    border: 1px solid rgba(255,68,68,0.2);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    color: var(--accent-red);
    font-size: 0.85em;
}

.article-full pre.code-block {
    background: #0a0e14;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    overflow-x: auto;
    margin: 16px 0;
}

.article-full pre code {
    color: #e6e6e6;
    font-size: 0.875rem;
}

/* --- Alert/Notice --- */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: rgba(0,255,65,0.08);
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.alert-danger {
    background: rgba(255,68,68,0.08);
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.alert-warning {
    background: rgba(240,192,64,0.08);
    border-color: var(--accent-yellow);
    color: var(--accent-yellow);
}

.alert-info {
    background: rgba(88,166,255,0.08);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

/* --- Footer --- */
.site-footer {
    margin-top: 60px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    padding: 40px 0 20px;
    position: relative;
    overflow: hidden;
}

.footer-scanline {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-green), transparent);
    animation: scanline 3s linear infinite;
}

@keyframes scanline {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.footer-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 30px;
    align-items: start;
}

.footer-logo {
    font-size: 1.2rem;
    font-weight: 700;
    display: block;
    margin-bottom: 8px;
}

.footer-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.8rem;
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--accent-green);
}

.footer-right {
    text-align: right;
}

.footer-copy {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-note {
    font-size: 0.7rem;
    color: var(--text-muted);
    opacity: 0.6;
}

/* --- Phishing Quiz --- */
.phishing-quiz-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 16px;
}

.phishing-url {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    word-break: break-all;
    background: var(--bg-secondary);
    padding: 10px;
    border-radius: var(--radius-sm);
    margin: 10px 0;
    color: var(--text-secondary);
}

.phishing-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 16px;
}

.phishing-option {
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.phishing-option:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.phishing-option.correct {
    border-color: var(--accent-green);
    background: rgba(0,255,65,0.1);
    color: var(--accent-green);
}

.phishing-option.wrong {
    border-color: var(--accent-red);
    background: rgba(255,68,68,0.1);
    color: var(--accent-red);
}

/* Score display */
.score-display {
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 1.1rem;
    margin-bottom: 24px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.score-label {
    color: var(--text-secondary);
}

.score-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-green);
}

/* --- CSRF Demo --- */
.csrf-demo-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin: 24px 0;
}

.csrf-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.csrf-panel-header {
    padding: 12px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
    font-weight: 600;
}

.csrf-panel-body {
    padding: 20px;
}

.balance-display {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-green);
    text-align: center;
    padding: 20px;
    background: rgba(0,255,65,0.05);
    border: 1px solid rgba(0,255,65,0.2);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .layout-grid {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: static;
    }
    .footer-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-right {
        text-align: center;
    }
    .footer-links {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    .phishing-options {
        grid-template-columns: 1fr;
    }
    .csrf-demo-container {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   LIGHT THEME
   ============================================================ */
[data-theme="light"] {
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-hover: #f5f7fa;
    --border-color: #d0d7de;
    --border-accent: #1a7f37;
    --text-primary: #1f2328;
    --text-secondary: #57606a;
    --text-muted: #8b949e;
    --accent-red: #cf222e;
    --accent-green: #1a7f37;
    --accent-blue: #0969da;
    --accent-yellow: #bf8700;
    --accent-purple: #8250df;
    --accent-orange: #bc4c00;
    --shadow-card: 0 2px 12px rgba(0,0,0,0.1);
    --shadow-glow-red: 0 0 15px rgba(207,34,46,0.2);
    --shadow-glow-green: 0 0 15px rgba(26,127,55,0.2);
}
[data-theme="light"] .site-header {
    background: rgba(255,255,255,0.95);
    border-bottom-color: var(--border-color);
}
[data-theme="light"] .logo-text {
    color: var(--text-primary);
}
[data-theme="light"] .hero {
    background: linear-gradient(135deg, #1a7f37, #0969da);
}
[data-theme="light"] .hero::after {
    background: rgba(240,242,245,0.85);
}
[data-theme="light"] #matrix-bg {
    display: none;
}

/* ============================================================
   CYBER-BLUE THEME
   ============================================================ */
[data-theme="cyber-blue"] {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #1a2234;
    --bg-hover: #243044;
    --border-color: #1e3a5f;
    --border-accent: #00d4ff;
    --text-primary: #e0f2fe;
    --text-secondary: #7dd3fc;
    --text-muted: #38bdf8;
    --accent-red: #f43f5e;
    --accent-green: #22d3ee;
    --accent-blue: #38bdf8;
    --accent-yellow: #fbbf24;
    --accent-purple: #a78bfa;
    --accent-orange: #fb923c;
    --shadow-card: 0 2px 12px rgba(0,0,0,0.5);
    --shadow-glow-red: 0 0 20px rgba(244,63,94,0.3);
    --shadow-glow-green: 0 0 20px rgba(34,211,238,0.2);
}
[data-theme="cyber-blue"] .site-header {
    background: rgba(10,14,23,0.95);
    border-bottom: 1px solid var(--border-color);
}
[data-theme="cyber-blue"] .hero::before {
    background:
        radial-gradient(ellipse at 20% 50%, rgba(56,189,248,0.1) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 50%, rgba(34,211,238,0.08) 0%, transparent 60%);
}
[data-theme="cyber-blue"] .article-card::before {
    background: var(--accent-blue);
}
[data-theme="cyber-blue"] .article-card:hover {
    border-color: rgba(56,189,248,0.4);
}
[data-theme="cyber-blue"] .btn-primary {
    background: linear-gradient(135deg, #0ea5e9, #06b6d4);
    box-shadow: 0 0 16px rgba(14,165,233,0.4);
}
[data-theme="cyber-blue"] .btn-primary:hover {
    box-shadow: 0 0 24px rgba(14,165,233,0.6);
}
[data-theme="cyber-blue"] .stat-num {
    color: var(--accent-blue);
}
[data-theme="cyber-blue"] .logo-text .accent {
    color: var(--accent-blue);
}
[data-theme="cyber-blue"] .hero-badge {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}
[data-theme="cyber-blue"] .txt-icon {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}
[data-theme="cyber-blue"] .nav-link > span:first-child {
    color: var(--accent-blue);
}
[data-theme="cyber-blue"] .nav-link.active {
    color: var(--accent-blue);
    background: rgba(56,189,248,0.08);
    border-color: rgba(56,189,248,0.2);
}

/* ============================================================
   HACKER-PURPLE THEME
   ============================================================ */
[data-theme="hacker-purple"] {
    --bg-primary: #0f0a1a;
    --bg-secondary: #1a1225;
    --bg-card: #231a33;
    --bg-hover: #2d2240;
    --border-color: #3d2d5c;
    --border-accent: #a855f7;
    --text-primary: #f3e8ff;
    --text-secondary: #c4b5fd;
    --text-muted: #a78bfa;
    --accent-red: #f472b6;
    --accent-green: #c084fc;
    --accent-blue: #818cf8;
    --accent-yellow: #fcd34d;
    --accent-purple: #c084fc;
    --accent-orange: #fb923c;
    --shadow-card: 0 2px 12px rgba(0,0,0,0.5);
    --shadow-glow-red: 0 0 20px rgba(244,114,182,0.3);
    --shadow-glow-green: 0 0 20px rgba(192,132,252,0.2);
}
[data-theme="hacker-purple"] .site-header {
    background: rgba(15,10,26,0.95);
    border-bottom: 1px solid var(--border-color);
}
[data-theme="hacker-purple"] .hero::before {
    background:
        radial-gradient(ellipse at 20% 50%, rgba(168,85,247,0.12) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 50%, rgba(192,132,252,0.08) 0%, transparent 60%);
}
[data-theme="hacker-purple"] .article-card::before {
    background: linear-gradient(180deg, #a855f7, #ec4899);
}
[data-theme="hacker-purple"] .article-card:hover {
    border-color: rgba(168,85,247,0.4);
}
[data-theme="hacker-purple"] .btn-primary {
    background: linear-gradient(135deg, #9333ea, #c026d3);
    box-shadow: 0 0 16px rgba(147,51,234,0.4);
}
[data-theme="hacker-purple"] .btn-primary:hover {
    box-shadow: 0 0 24px rgba(147,51,234,0.6);
}
[data-theme="hacker-purple"] .stat-num {
    color: var(--accent-purple);
}
[data-theme="hacker-purple"] .logo-text .accent {
    color: var(--accent-purple);
}
[data-theme="hacker-purple"] .hero-badge {
    border-color: var(--accent-purple);
    color: var(--accent-purple);
}
[data-theme="hacker-purple"] .txt-icon {
    border-color: var(--accent-purple);
    color: var(--accent-purple);
}
[data-theme="hacker-purple"] .nav-link > span:first-child {
    color: var(--accent-purple);
}
[data-theme="hacker-purple"] .nav-link.active {
    color: var(--accent-purple);
    background: rgba(168,85,247,0.08);
    border-color: rgba(168,85,247,0.2);
}
[data-theme="hacker-purple"] .reading-progress-bar {
    background: linear-gradient(90deg, #a855f7, #ec4899);
}

/* ============================================================
   SKELETON LOADING
   ============================================================ */
.skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-hover) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1em;
    margin-bottom: 8px;
    border-radius: 4px;
}

.skeleton-text.short { width: 60%; }
.skeleton-text.medium { width: 80%; }
.skeleton-text.long { width: 100%; }

.skeleton-title {
    height: 1.5em;
    width: 70%;
    margin-bottom: 12px;
    border-radius: 6px;
}

.skeleton-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 16px;
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.skeleton-image {
    width: 100%;
    height: 200px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}

.skeleton-btn {
    height: 40px;
    width: 120px;
    border-radius: var(--radius-md);
}

/* Loading state for article cards */
.article-card.skeleton {
    pointer-events: none;
}

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scale-in {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* Staggered animation delays */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* Hover lift effect */
.hover-lift {
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

/* Pulse animation for important elements */
.pulse {
    animation: pulse-effect 2s ease-in-out infinite;
}

@keyframes pulse-effect {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Number counter animation */
.count-up {
    display: inline-block;
    transition: transform 0.3s ease;
}

.count-up.counting {
    transform: scale(1.1);
}

/* ============================================================
   BUTTON RIPPLE EFFECT
   ============================================================ */
.btn-ripple {
    position: relative;
    overflow: hidden;
}

.btn-ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255,255,255,0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
}

.btn-ripple:active::after {
    width: 200%;
    height: 200%;
}

/* ============================================================
   ENHANCED ARTICLE CARDS
   ============================================================ */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.article-card-v2 {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.article-card-v2::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-blue));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.article-card-v2:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: 0 12px 40px rgba(0,255,136,0.15);
}

.article-card-v2:hover::before {
    transform: scaleX(1);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.card-icon {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 8px;
    border: 1px solid var(--accent-green);
    border-radius: 6px;
    color: var(--accent-green);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,255,136,0.08);
    border-radius: 10px;
}

.card-cat {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    background: rgba(0,255,136,0.1);
    padding: 3px 10px;
    border-radius: 12px;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-excerpt {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.7;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
}

.card-footer {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.card-views {
    display: flex;
    align-items: center;
    gap: 4px;
}

.card-views .icon {
    font-size: 0.9rem;
}

.card-arrow {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 1.2rem;
    color: var(--text-muted);
    opacity: 0;
    transform: translateX(-8px);
    transition: all 0.2s;
}

.article-card-v2:hover .card-arrow {
    opacity: 1;
    transform: translateX(0);
    color: var(--accent);
}

/* Category-specific colors */
.article-card-v2[data-category="Web安全"]::before { background: linear-gradient(90deg, #ff6b6b, #ffa94d); }
.article-card-v2[data-category="密码安全"]::before { background: linear-gradient(90deg, #7950f2, #e64980); }
.article-card-v2[data-category="渗透测试"]::before { background: linear-gradient(90deg, #15aabf, #69db7c); }
.article-card-v2[data-category="社会工程"]::before { background: linear-gradient(90deg, #4dabf7, #fab005); }
.article-card-v2[data-category="CTF"]::before { background: linear-gradient(90deg, #ff8c42, #ff6b6b); }

@media (max-width: 640px) {
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   HEADER SEARCH
   ============================================================ */
.header-search {
    position: relative;
    display: flex;
    align-items: center;
    max-width: 260px;
    flex: 1;
}
.header-search input {
    flex: 1;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 8px 14px;
    font-size: 0.85rem;
    color: var(--text-primary);
    outline: none;
    transition: all 0.2s;
    min-width: 0;
}
.header-search input:focus {
    border-color: var(--accent-green);
    background: var(--bg-card);
    width: 320px;
}
.header-search input::placeholder {
    color: var(--text-muted);
}
.header-search button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.search-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: var(--shadow-card);
    z-index: 1000;
    overflow: hidden;
    display: none;
    min-width: 300px;
}
.search-dropdown:empty { display: none; }
.search-dropdown .dropdown-item {
    display: block;
    padding: 10px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.88rem;
    transition: background 0.15s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.search-dropdown .dropdown-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}
.search-dropdown .dropdown-divider {
    border-top: 1px solid var(--border-color);
    margin: 4px 0;
}

/* ============================================================
   MEMBER MENU
   ============================================================ */
.member-menu {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background: var(--bg-hover);
    transition: all 0.15s;
    font-size: 0.85rem;
}
.member-menu:hover {
    border-color: var(--accent-green);
    background: var(--bg-card);
}
.member-avatar { font-size: 1.1rem; }
.member-name { color: var(--text-primary); font-weight: 500; }
.member-points {
    color: var(--accent-yellow);
    font-size: 0.78rem;
    font-weight: 600;
}
.member-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 180px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: var(--shadow-card);
    z-index: 1000;
    overflow: hidden;
}
.member-menu:hover .member-dropdown { display: block; }
.dropdown-item {
    display: block;
    padding: 10px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.88rem;
    transition: background 0.15s;
}
.dropdown-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.dropdown-divider { border-top: 1px solid var(--border-color); margin: 4px 0; }

/* ============================================================
   THEME TOGGLE
   ============================================================ */
.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    padding: 0;
}
.theme-toggle:hover {
    border-color: var(--accent-yellow);
    transform: rotate(20deg);
}

/* Theme toggle icons */
.theme-icon-light::before {
    content: '';
    width: 0.35em;
    height: 0.35em;
    border: 2px solid var(--accent-yellow);
    border-radius: 50%;
}
.theme-icon-light::after {
    content: '';
    position: absolute;
    width: 0.12em;
    height: 0.15em;
    background: var(--accent-yellow);
    box-shadow: 0.35em 0 0 var(--accent-yellow), -0.35em 0 0 var(--accent-yellow), 0.18em -0.3em 0 var(--accent-yellow), -0.18em -0.3em 0 var(--accent-yellow), 0.18em 0.3em 0 var(--accent-yellow), -0.18em 0.3em 0 var(--accent-yellow);
}
.theme-icon-dark::before {
    content: '';
    width: 0.45em;
    height: 0.45em;
    border: 2px solid var(--text-secondary);
    border-radius: 50%;
    clip-path: polygon(50% 0%, 100% 0%, 100% 100%, 50% 100%, 0% 100%, 0% 0%);
}

/* ============================================================
   MOBILE MENU
   ============================================================ */
.mobile-search {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
}
.mobile-search input {
    flex: 1;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 0.9rem;
    color: var(--text-primary);
}
.mobile-search button {
    background: var(--accent-green);
    border: none;
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
}
.nav-login {
    color: var(--accent-green) !important;
    border: 1px solid var(--accent-green) !important;
}
.nav-login:hover {
    background: rgba(0,255,65,0.1) !important;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
    .layout-grid {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: static;
    }
    .footer-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-right {
        text-align: center;
    }
    .footer-links {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    .phishing-options {
        grid-template-columns: 1fr;
    }
    .csrf-demo-container {
        grid-template-columns: 1fr;
    }
    .header-search {
        display: none;
    }
    /* Sim pages responsive */
    .sim-cards-grid {
        grid-template-columns: 1fr;
    }
    .sim-panel-body {
        padding: 16px;
    }
    .payload-presets {
        gap: 6px;
    }
    .payload-btn {
        font-size: 0.68rem;
        padding: 4px 8px;
    }
}

@media (max-width: 640px) {
    .main-nav {
        display: none;
    }
    .mobile-menu-btn {
        display: flex;
    }
    .hero {
        padding: 40px 16px;
    }
    .article-full {
        padding: 20px;
    }
    .hero-title {
        font-size: 1.8rem;
    }
    .stat-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    /* Sim page mobile fixes */
    .sim-page-title {
        font-size: 1.3rem;
    }
    .sim-panel-header {
        font-size: 0.8rem;
        padding: 10px 14px;
    }
    .sim-panel-body {
        padding: 12px;
    }
    .form-input, .form-textarea, .form-select {
        font-size: 16px; /* Prevent iOS zoom */
    }
    .btn {
        padding: 10px 16px;
        font-size: 0.85rem;
    }
    .terminal-body {
        font-size: 0.75rem;
        padding: 10px;
        overflow-x: auto;
    }
    .score-display {
        flex-direction: column;
        text-align: center;
    }
    .balance-display {
        font-size: 1.4rem;
    }
    .result-success, .result-danger {
        font-size: 0.8rem;
        padding: 12px;
        word-break: break-word;
    }
    .progress-bar-wrap {
        height: 20px;
    }
}

/* ============================================================
   TEXT-BASED ICONS (Terminal Style)
   ============================================================ */
.logo-shield {
    width: 24px;
    height: 28px;
    border: 2px solid var(--accent-green);
    border-radius: 4px 4px 12px 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.logo-shield::after {
    content: 'S';
    font-weight: 700;
    font-size: 14px;
    color: var(--accent-green);
}

/* 文本图标 - 使用绿色边框样式 */
.txt-icon {
    font-size: 0.75em;
    font-weight: 700;
    padding: 2px 6px;
    border: 1px solid var(--accent-green);
    border-radius: 4px;
    margin-right: 6px;
    color: var(--accent-green);
    background: transparent;
}

/* 导航栏紧凑化 */
.main-nav {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-wrap: nowrap;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-family: var(--font-mono);
    transition: var(--transition);
    text-decoration: none;
    border: 1px solid transparent;
    white-space: nowrap;
}

.nav-link > span:first-child {
    color: var(--accent-green);
    font-size: 0.7rem;
    font-weight: 600;
    opacity: 0.9;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
    text-decoration: none;
}

.nav-link.active {
    color: var(--accent-green);
    background: rgba(0,255,65,0.08);
    border-color: rgba(0,255,65,0.2);
}

/* 搜索按钮 */
.header-search button {
    background: none;
    border: 1px solid var(--accent-green);
    border-radius: 4px;
    padding: 4px 8px;
    color: var(--accent-green);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-mono);
}

.header-search button:hover {
    background: var(--accent-green);
    color: var(--bg-primary);
}

/* ============================================================
   MOBILE BOTTOM NAVIGATION
   ============================================================ */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 8px 0;
    padding-bottom: max(8px, env(safe-area-inset-bottom));
    z-index: 1000;
    backdrop-filter: blur(12px);
}

.mobile-bottom-nav-inner {
    display: flex;
    justify-content: space-around;
    align-items: center;
    max-width: 500px;
    margin: 0 auto;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 12px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.7rem;
    transition: all 0.2s;
    border-radius: 8px;
    min-width: 50px;
}

.mobile-nav-item:active {
    transform: scale(0.95);
}

.mobile-nav-item.active {
    color: var(--accent-green);
}

.mobile-nav-item .icon {
    font-size: 1.1rem;
    font-weight: 700;
}

.mobile-nav-item .label {
    font-size: 0.65rem;
    white-space: nowrap;
}

/* Show bottom nav on mobile */
@media (max-width: 640px) {
    .mobile-bottom-nav {
        display: block;
    }

    /* Add bottom padding to body for bottom nav */
    body {
        padding-bottom: 70px;
    }

    .site-footer {
        padding-bottom: 80px;
    }

    /* Hide theme toggle on mobile bottom nav */
    .theme-toggle-mobile {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 2px;
        padding: 6px 12px;
        color: var(--text-muted);
        background: none;
        border: none;
        cursor: pointer;
        font-size: 0.65rem;
        font-family: var(--font-mono);
    }

    .theme-toggle-mobile .icon {
        font-size: 1.1rem;
    }
}

/* ============================================================
   THEME SELECTOR DROPDOWN
   ============================================================ */
.theme-selector {
    position: relative;
}

.theme-selector-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
}

.theme-selector-btn:hover {
    border-color: var(--accent-yellow);
    transform: rotate(15deg);
}

.theme-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: var(--shadow-card);
    z-index: 1000;
    overflow: hidden;
}

.theme-selector:hover .theme-dropdown {
    display: block;
}

.theme-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.15s;
}

.theme-option:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.theme-option.active {
    color: var(--accent-green);
    background: rgba(0,255,65,0.08);
}

.theme-option .theme-preview {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.theme-preview-dark {
    background: linear-gradient(135deg, #0d1117, #1c2128);
    border-color: #00ff41;
}

.theme-preview-light {
    background: linear-gradient(135deg, #f0f2f5, #ffffff);
    border-color: #1a7f37;
}

.theme-preview-cyber-blue {
    background: linear-gradient(135deg, #0a0e17, #1a2234);
    border-color: #00d4ff;
}

.theme-preview-hacker-purple {
    background: linear-gradient(135deg, #0f0a1a, #231a33);
    border-color: #a855f7;
}

/* ============================================================
   TOUCH-FRIENDLY IMPROVEMENTS
   ============================================================ */
@media (max-width: 640px) {
    /* Larger touch targets */
    .btn {
        min-height: 44px;
        min-width: 44px;
    }

    .form-input,
    .form-textarea,
    .form-select {
        min-height: 44px;
        font-size: 16px; /* Prevent iOS zoom */
    }

    /* Larger checkboxes and radios */
    input[type="checkbox"],
    input[type="radio"] {
        width: 22px;
        height: 22px;
    }

    /* Swipe indicators */
    .swipe-hint {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px;
        background: var(--bg-secondary);
        border-radius: var(--radius-md);
        font-size: 0.85rem;
        color: var(--text-muted);
        margin-bottom: 16px;
    }

    .swipe-hint::before {
        content: '←';
        animation: swipe-hint-left 1.5s ease-in-out infinite;
    }

    @keyframes swipe-hint-left {
        0%, 100% { transform: translateX(0); opacity: 0.5; }
        50% { transform: translateX(-10px); opacity: 1; }
    }
}

/* ============================================================
   LAZY LOADING PLACEHOLDER
   ============================================================ */
.lazy-placeholder {
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
}

.lazy-placeholder::before {
    content: '...';
    color: var(--text-muted);
    font-size: 1.5rem;
    animation: loading-dots 1s ease-in-out infinite;
}

@keyframes loading-dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

/* Image lazy loading fade-in */
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease;
}

img[data-src].loaded {
    opacity: 1;
}

/* ============================================================
   TOAST NOTIFICATIONS
   ============================================================ */
.toast-container {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    padding: 12px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    font-size: 0.875rem;
    color: var(--text-primary);
    animation: toast-in 0.3s ease, toast-out 0.3s ease 2.7s forwards;
    pointer-events: auto;
}

.toast.success {
    border-color: var(--accent-green);
    background: rgba(0,255,65,0.1);
    color: var(--accent-green);
}

.toast.error {
    border-color: var(--accent-red);
    background: rgba(255,68,68,0.1);
    color: var(--accent-red);
}

.toast.warning {
    border-color: var(--accent-yellow);
    background: rgba(240,192,64,0.1);
    color: var(--accent-yellow);
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes toast-out {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}

/* ============================================================
   IMPROVED SCROLLBAR
   ============================================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) var(--bg-secondary);
}

/* ============================================================
   FOCUS VISIBLE (Accessibility)
   ============================================================ */
:focus-visible {
    outline: 2px solid var(--accent-green);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--accent-green);
    outline-offset: 2px;
}

/* ============================================================
   PRINT STYLES
   ============================================================ */
@media print {
    .site-header,
    .site-footer,
    .sidebar,
    .mobile-bottom-nav,
    .theme-selector,
    .reading-progress {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    .article-full {
        border: none;
        padding: 0;
    }

    a {
        color: #000;
        text-decoration: underline;
    }
}