/* ============ RESET & VARIABLES - STUDIO DARK THEME ============ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    background: #0B0D10;
    color: #E9EEF5;
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    width: 100%;
    position: relative;
}

/* Subtle background gradient - electric cyan glow */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(64, 224, 255, 0.03) 0%, transparent 45%),
        radial-gradient(circle at 80% 70%, rgba(64, 224, 255, 0.03) 0%, transparent 45%);
    pointer-events: none;
    z-index: 0;
}

main {
    flex: 1;
    position: relative;
    z-index: 1;
    width: 100%;
}

/* Studio Dark theme variables */
:root {
    --primary: #40E0FF;
    --primary-dark: #00B8D4;
    --primary-light: rgba(64, 224, 255, 0.15);
    --primary-glow: rgba(64, 224, 255, 0.25);
    --secondary: #40E0FF;
    --accent: #00B8D4;
    --warning: #FFB74D;
    --danger: #FF5252;
    --success: #4CAF50;
    --info: #40E0FF;
    --surface-0: #0B0D10;
    --surface-1: #151A21;
    --surface-2: #1E2630;
    --surface-3: #273140;
    --text-primary: #E9EEF5;
    --text-secondary: #C0C8D2;
    --text-tertiary: #9AA5B5;
    --text-muted: #6B7A8F;
    --border: #273140;
    --border-strong: #3A4A60;
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.7);
    --shadow-glow: 0 0 30px rgba(64, 224, 255, 0.25);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --cyan-gradient: linear-gradient(135deg, #40E0FF, #00B8D4);
}

/* Progress bar */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--cyan-gradient);
    z-index: 2000;
    transition: width 0.1s ease;
    box-shadow: 0 0 10px rgba(64, 224, 255, 0.5);
}

/* Skip to content */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--cyan-gradient);
    color: #0B0D10;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 0 0 8px 0;
    font-weight: 600;
    z-index: 1001;
    transition: top 0.3s;
}
.skip-to-content:focus { top: 0; }

/* Toast for copy */
#toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: var(--cyan-gradient);
    color: #0B0D10;
    padding: 12px 24px;
    border-radius: 40px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 9999;
    transition: transform 0.3s ease;
    max-width: 90%;
    white-space: nowrap;
}
#toast.show { transform: translateX(-50%) translateY(0); }

/* Container - narrower for readability */
.container {
    max-width: 1000px;
    margin: 20px auto;
    padding: 0 16px;
}
@media (min-width: 768px) {
    .container { margin: 40px auto; padding: 0 20px; }
}

/* ===== STUDIO DARK HEADER ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(11, 13, 16, 0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    width: 100%;
}
.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    flex-wrap: wrap;
}
.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}
.logo-link {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}
.logo-icon {
    width: 36px; height: 36px;
    background: var(--cyan-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0B0D10;
    font-size: 1.1rem;
    box-shadow: 0 0 15px rgba(64,224,255,0.3);
    transition: var(--transition);
}
.logo-link:hover .logo-icon {
    transform: rotate(5deg) scale(1.05);
    box-shadow: 0 0 25px rgba(64,224,255,0.5);
}
.brand-name {
    font-size: 1.2rem;
    font-weight: 800;
    color: #E9EEF5;
    letter-spacing: -0.3px;
    white-space: nowrap;
}
.brand-name span {
    color: #40E0FF;
    position: relative;
}
.slogan-badge {
    display: none;
    background: rgba(64,224,255,0.1);
    color: #40E0FF;
    font-size: 0.6rem;
    padding: 4px 8px;
    border-radius: 30px;
    border: 1px solid var(--border);
    align-items: center;
    gap: 4px;
}
@media (min-width:480px) { .slogan-badge { display: inline-flex; } }

/* Desktop navigation */
.nav-desktop { display: none; }
@media (min-width: 1024px) {
    .nav-desktop {
        display: flex;
        align-items: center;
        gap: 2px;
        margin: 0 auto;
        padding: 4px;
        background: rgba(21,26,33,0.6);
        border-radius: 60px;
        border: 1px solid var(--border);
        backdrop-filter: blur(8px);
    }
    .nav-link {
        color: #9AA5B5;
        text-decoration: none;
        font-size: 0.8rem;
        font-weight: 500;
        padding: 6px 12px;
        border-radius: 40px;
        display: inline-flex;
        align-items: center;
        gap: 4px;
        border: 1px solid transparent;
        transition: var(--transition);
    }
    .nav-link i { font-size: 0.75rem; color: #6B7A8F; }
    .nav-link:hover {
        color: #40E0FF;
        background: rgba(64,224,255,0.1);
        border-color: rgba(64,224,255,0.2);
        transform: translateY(-1px);
    }
    .nav-link:hover i { color: #40E0FF; }
    .nav-link.active {
        background: var(--cyan-gradient);
        color: #0B0D10;
        border-color: transparent;
        box-shadow: 0 4px 12px rgba(64,224,255,0.3);
    }
    .nav-link.active i { color: #0B0D10; }
    .nav-dropdown { position: relative; }
    .dropdown-menu {
        position: absolute;
        top: calc(100% + 8px);
        left: 50%;
        transform: translateX(-50%) translateY(10px);
        background: #151A21;
        border-radius: 16px;
        padding: 8px;
        min-width: 220px;
        box-shadow: var(--shadow-lg);
        border: 1px solid var(--border);
        opacity: 0;
        visibility: hidden;
        transition: all 0.2s;
        backdrop-filter: blur(12px);
        z-index: 100;
    }
    .nav-dropdown:hover .dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: translateX(-50%) translateY(0);
    }
    .dropdown-menu a {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 10px 16px;
        color: #9AA5B5;
        text-decoration: none;
        font-size: 0.8rem;
        border-radius: 10px;
    }
    .dropdown-menu a i { width: 20px; color: #40E0FF; }
    .dropdown-menu a:hover {
        background: rgba(64,224,255,0.1);
        color: #40E0FF;
        transform: translateX(4px);
    }
    .dropdown-group-title {
        font-size: 0.65rem;
        text-transform: uppercase;
        letter-spacing: 0.5px;
        font-weight: 700;
        color: #40E0FF;
        padding: 8px 12px 4px;
        margin-top: 4px;
        border-bottom: 1px solid var(--border);
    }
}

/* Action buttons */
.action-buttons {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
    flex-wrap: wrap;
}
.guides-link {
    padding: 8px 16px;
    border-radius: 40px;
    font-size: 0.8rem;
    font-weight: 600;
    background: var(--cyan-gradient);
    color: #0B0D10;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    min-height: 40px;
    text-decoration: none;
}
.guides-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(64,224,255,0.4);
}
.guides-link .link-text { display: none; }
@media (min-width:768px) { .guides-link .link-text { display: inline; } }

/* Auth button styles */
.auth-btn {
    padding: 8px 16px;
    border-radius: 40px;
    font-size: 0.8rem;
    font-weight: 600;
    background: #1E2630;
    border: 1px solid #273140;
    color: #E9EEF5;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    transition: var(--transition);
    height: 44px;
}
.auth-btn i { font-size: 0.8rem; color: #40E0FF; }
.auth-btn:hover {
    background: var(--cyan-gradient);
    border-color: transparent;
    color: #0B0D10;
    transform: translateY(-2px);
}
.user-profile {
    display: flex;
    align-items: center;
    gap: 4px;
    background: #1E2630;
    border: 1px solid #273140;
    border-radius: 60px;
    padding: 3px 3px 3px 10px;
    transition: var(--transition);
    height: 44px;
}
.user-profile:hover { border-color: #40E0FF; background: rgba(64,224,255,0.1); }
.user-avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--cyan-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0B0D10;
    font-weight: 600;
    font-size: 0.9rem;
}
.sign-out-btn {
    width: 36px; height: 36px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: #9AA5B5;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.sign-out-btn:hover { color: #FF5252; transform: scale(1.1); background: rgba(255,82,82,0.1); }

@media (max-width: 768px) {
    .auth-btn { padding: 6px 12px; height: 40px; font-size: 0.75rem; }
    .user-profile { padding: 2px 2px 2px 8px; height: 40px; }
    .user-avatar { width: 32px; height: 32px; font-size: 0.8rem; }
    .sign-out-btn { width: 32px; height: 32px; }
}
@media (max-width: 480px) {
    .auth-btn { padding: 6px 10px; height: 36px; }
    .auth-btn span { display: none; }
    .auth-btn i { font-size: 0.9rem; margin: 0; }
    .user-profile { padding: 2px; height: 36px; }
    .user-avatar { width: 28px; height: 28px; font-size: 0.7rem; }
    .sign-out-btn { width: 28px; height: 28px; }
}

/* Ko-fi link */
.kofi-link {
    position: relative;
    width: 40px; height: 40px;
    border-radius: 50%;
    background: #1E2630;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-decoration: none;
    flex-shrink: 0;
}
.kofi-link:hover {
    transform: translateY(-3px) scale(1.05);
    border-color: #40E0FF;
    background: var(--cyan-gradient);
    box-shadow: 0 5px 20px rgba(64,224,255,0.4);
}
.coffee-cup { position: relative; width: 20px; height: 20px; display: flex; justify-content: center; align-items: center; }
.cup-body { position: relative; width: 16px; height: 14px; background: linear-gradient(135deg, #FFD700, #FFA500); border-radius: 0 0 8px 8px; animation: cupFill 2s infinite alternate; }
.cup-body::before { content: ''; position: absolute; top: 2px; left: 2px; width: 12px; height: 10px; background: linear-gradient(135deg, #FFE55C, #FFB347); border-radius: 0 0 6px 6px; opacity: 0.8; }
.cup-handle { position: absolute; top: 2px; right: -4px; width: 4px; height: 7px; border: 2px solid #FFD700; border-left: none; border-radius: 0 4px 4px 0; }
.coffee-liquid { position: absolute; top: -2px; left: 2px; width: 12px; height: 3px; background: linear-gradient(90deg, #8B4513, #A0522D); border-radius: 2px; animation: liquidWave 2s infinite; }
.coffee-steam { position: absolute; top: -8px; left: 4px; display: flex; gap: 2px; opacity: 0; transition: opacity 0.3s; }
.kofi-link:hover .coffee-steam { opacity: 1; }
.coffee-steam span { width: 2px; height: 8px; background: linear-gradient(to top, rgba(255,255,255,0.8), transparent); border-radius: 1px; animation: steam 1.5s infinite; }
.coffee-steam span:nth-child(1) { animation-delay: 0s; }
.coffee-steam span:nth-child(2) { animation-delay: 0.3s; }
.coffee-steam span:nth-child(3) { animation-delay: 0.6s; }
@keyframes cupFill { 0% { transform: scaleY(1); } 100% { transform: scaleY(1.05); } }
@keyframes liquidWave { 0%,100% { transform: translateX(0) scaleX(1); } 25% { transform: translateX(1px) scaleX(1.05); } 75% { transform: translateX(-1px) scaleX(0.95); } }
@keyframes steam { 0% { transform: translateY(0) scaleX(1); opacity:0.8; } 100% { transform: translateY(-10px) scaleX(2); opacity:0; } }
.kofi-tooltip { position: absolute; bottom: -30px; left: 50%; transform: translateX(-50%) scale(0.8); background: var(--cyan-gradient); color: #0B0D10; font-size: 0.65rem; font-weight: 600; padding: 4px 10px; border-radius: 20px; white-space: nowrap; opacity: 0; visibility: hidden; transition: all 0.3s; pointer-events: none; }
.kofi-link:hover .kofi-tooltip { opacity: 1; visibility: visible; bottom: -40px; transform: translateX(-50%) scale(1); }

.mobile-menu-btn {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: #1E2630;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #40E0FF;
    transition: var(--transition);
    flex-shrink: 0;
    cursor: pointer;
}
@media (min-width: 1024px) { .mobile-menu-btn { display: none; } }

/* Mobile menu */
.mobile-menu {
    position: fixed;
    top: 0; right: -100%;
    width: 300px; height: 100vh;
    background: #151A21;
    z-index: 1001;
    transition: right 0.3s;
    padding: 80px 20px 20px;
    border-left: 1px solid var(--border);
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}
.mobile-menu.active { right: 0; }
.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}
.mobile-menu-close {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: #1E2630;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #40E0FF;
    cursor: pointer;
    transition: var(--transition);
}
.mobile-menu-close:hover { background: var(--cyan-gradient); color: #0B0D10; transform: rotate(90deg); }
.mobile-nav-links { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    color: #9AA5B5;
    text-decoration: none;
    font-size: 0.95rem;
    border-radius: 12px;
    transition: var(--transition);
    min-height: 48px;
}
.mobile-nav-link i { width: 20px; color: #40E0FF; }
.mobile-nav-link:hover { background: rgba(64,224,255,0.1); color: #40E0FF; transform: translateX(5px); }
.mobile-nav-link.active { background: rgba(64,224,255,0.15); color: #40E0FF; font-weight: 600; }
.new-badge {
    margin-left: auto;
    font-size: 0.55rem;
    background: #40E0FF;
    color: #0B0D10;
    padding: 2px 6px;
    border-radius: 10px;
}
.mobile-menu-overlay {
    position: fixed;
    top:0; left:0;
    width:100%; height:100%;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(4px);
    z-index:1000;
    opacity:0;
    visibility:hidden;
    transition: var(--transition);
}
.mobile-menu-overlay.active { opacity:1; visibility:visible; }

/* Back link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #40E0FF;
    text-decoration: none;
    margin-bottom: 20px;
    padding: 8px 16px;
    background: #151A21;
    border-radius: 40px;
    border: 1px solid var(--border);
    transition: var(--transition);
    font-size: 0.85rem;
    width: fit-content;
}
.back-link:hover { background: rgba(64,224,255,0.1); transform: translateX(-4px); border-color: #40E0FF; }

/* Jump to Section Dropdown */
.jump-dropdown-container {
    max-width: 800px;
    margin: 0 auto 20px;
    padding: 0 16px;
}
.jump-dropdown select {
    width: 100%;
    padding: 14px 18px;
    background: #1E2630;
    border: 1px solid var(--border);
    border-radius: 40px;
    color: #E9EEF5;
    font-size: 0.95rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2340E0FF' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 18px center;
    background-size: 16px;
    font-family: 'Inter', sans-serif;
}
.jump-dropdown select:focus { outline: none; border-color: #40E0FF; }

/* Article Card */
.article-card {
    background: #151A21;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    padding: 32px 24px;
    margin: 0 0 40px;
    box-shadow: var(--shadow-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
@media (min-width:768px) { .article-card { padding: 48px; } }

.trust-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(64,224,255,0.1);
    padding: 8px 16px;
    border-radius: 40px;
    border: 1px solid var(--border);
    font-size: 0.7rem;
    font-weight: 600;
    color: #40E0FF;
    margin-bottom: 24px;
}
.article-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}
@media (min-width:768px) { .article-title { font-size: 2.5rem; margin-bottom: 24px; } }
.title-highlight {
    background: var(--cyan-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.article-meta {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}
@media (min-width:640px) { .article-meta { flex-direction: row; align-items: center; gap: 24px; } }
.author { display: flex; align-items: center; gap: 12px; }
.author-avatar {
    width: 44px; height: 44px;
    background: var(--cyan-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0B0D10;
    font-weight: 700;
}
.author-name { font-weight: 700; color: #E9EEF5; font-size: 0.95rem; }
.author-title { font-size: 0.8rem; color: #9AA5B5; }
.meta-item { display: flex; align-items: center; gap: 8px; color: #9AA5B5; font-size: 0.85rem; }
.meta-item i { color: #40E0FF; width: 16px; }
.last-updated {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #1E2630;
    padding: 4px 10px;
    border-radius: 30px;
    font-size: 0.7rem;
    color: #9AA5B5;
    border: 1px solid var(--border);
}
.last-updated i { color: #40E0FF; }
.article-subtitle {
    font-size: 1rem;
    line-height: 1.7;
    color: #C0C8D2;
    margin-bottom: 30px;
    border-left: 4px solid #40E0FF;
    padding: 20px 24px;
    background: #1E2630;
    border-radius: var(--radius-lg);
    font-style: italic;
}

/* Story card */
.story-card {
    background: #1E2630;
    border-radius: var(--radius-lg);
    padding: 24px;
    margin: 24px 0;
    border: 1px solid var(--border);
    border-left: 4px solid #40E0FF;
}
.story-card i { color: #40E0FF; font-size: 1.8rem; margin-bottom: 12px; }
.story-card h3 { margin-top: 0; color: #E9EEF5; }

/* Headings */
h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin: 48px 0 20px;
    color: #40E0FF;
    display: flex;
    align-items: center;
    gap: 12px;
}
h2 i { color: #40E0FF; font-size: 1.5rem; }
h3 { font-size: 1.2rem; font-weight: 600; margin: 32px 0 16px; color: #E9EEF5; }
p { margin-bottom: 1.2rem; color: #C0C8D2; font-size: 0.95rem; line-height: 1.7; }
p strong { color: #40E0FF; }
ul, ol { margin: 20px 0 28px 24px; color: #C0C8D2; }
li { margin-bottom: 8px; }

/* Tip & warning boxes */
.tip-box, .warning-box {
    padding: 20px;
    border-radius: var(--radius-lg);
    margin: 24px 0;
    border: 1px solid var(--border);
}
.tip-box { background: #1E2630; border-left: 4px solid #40E0FF; }
.warning-box { background: rgba(255,82,82,0.1); border-left: 4px solid #FF5252; }
.tip-box i { color: #40E0FF; margin-right: 8px; }
.warning-box i { color: #FF5252; margin-right: 8px; }

/* Interactive Font Tester */
.font-tester {
    background: #1E2630;
    border-radius: var(--radius-lg);
    padding: 24px;
    margin: 24px 0;
    border: 1px solid var(--border);
}
.tester-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: center;
}
.tester-input {
    flex: 1;
    min-width: 200px;
    padding: 12px 16px;
    background: #151A21;
    border: 1px solid var(--border);
    border-radius: 40px;
    color: #E9EEF5;
    font-size: 0.95rem;
}
.tester-input:focus { outline: none; border-color: #40E0FF; }
.tester-buttons { display: flex; gap: 8px; }
.tester-btn {
    padding: 10px 20px;
    background: #151A21;
    border: 1px solid var(--border);
    border-radius: 40px;
    color: #9AA5B5;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}
.tester-btn:hover { border-color: #40E0FF; color: #40E0FF; }
.tester-btn.active { background: var(--cyan-gradient); color: #0B0D10; border-color: transparent; }
.tester-preview {
    background: #151A21;
    border-radius: var(--radius-md);
    padding: 32px;
    text-align: center;
    border: 1px solid var(--border);
}
.preview-text { font-size: 2.5rem; margin-bottom: 12px; transition: font-family 0.2s ease; word-break: break-word; }
@media (max-width: 640px) { .preview-text { font-size: 1.8rem; } }
.preview-label { font-size: 0.85rem; color: #9AA5B5; }

/* Anatomy diagram */
.anatomy-diagram {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin: 24px 0;
}
.anatomy-row {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
@media (min-width:640px) {
    .anatomy-row { flex-direction: row; align-items: center; gap: 24px; }
}
.anatomy-letter {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    text-align: center;
    min-width: 100px;
}
.anatomy-feet {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.foot-marker {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: #1E2630;
    border-radius: 30px;
    border: 1px solid var(--border);
    font-size: 0.8rem;
}
.foot-marker i { color: #FF5252; font-size: 0.7rem; }

/* Personality Matrix */
.personality-matrix {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    font-size: 0.9rem;
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
@media (min-width: 640px) {
    .personality-matrix { display: table; overflow-x: visible; }
}
.personality-matrix th {
    background: #1E2630;
    padding: 16px;
    text-align: left;
    font-weight: 700;
    color: #40E0FF;
    border-bottom: 2px solid var(--border);
}
.personality-matrix td {
    padding: 16px;
    border-bottom: 1px solid var(--border);
    color: #C0C8D2;
}
.personality-matrix tr:last-child td { border-bottom: none; }
.matrix-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 30px;
    font-size: 0.7rem;
    font-weight: 600;
}
.badge-serif { background: rgba(64,224,255,0.1); color: #40E0FF; }
.badge-sans { background: rgba(76,175,80,0.1); color: #4CAF50; }

/* Comparison boxes */
.comparison-box {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 24px 0;
}
@media (min-width:640px) {
    .comparison-box { flex-direction: row; gap: 20px; }
}
.comparison-item {
    flex: 1;
    background: #1E2630;
    padding: 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.comparison-item:hover { border-color: #40E0FF; transform: translateY(-4px); }
.comparison-item h4 { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; color: #40E0FF; }
.example-text {
    font-size: 1.8rem;
    margin: 16px 0;
    padding: 16px;
    background: #151A21;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    text-align: center;
}
@media (min-width:768px) { .example-text { font-size: 2rem; } }
.example-small { font-size: 0.9rem; margin-top: 12px; color: #9AA5B5; }

/* Font family cards */
.font-family-card {
    background: #1E2630;
    padding: 20px;
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
    border: 1px solid var(--border);
    transition: var(--transition);
}
.font-family-card:hover { border-color: #40E0FF; transform: translateY(-2px); }
.font-family-card:last-child { margin-bottom: 0; }
.font-preview {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: #E9EEF5;
}
.badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 30px;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    background: var(--cyan-gradient);
    color: #0B0D10;
    margin-right: 8px;
}

/* Pairing box */
.pairing-box {
    background: #1E2630;
    padding: 20px;
    border-radius: var(--radius-lg);
    margin: 24px 0;
    border: 1px solid var(--border);
}
.pairing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
@media (min-width:640px) {
    .pairing-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
}
.pairing-grid p { margin-bottom: 4px; }

/* Quick reference */
.quick-ref-box {
    background: #1E2630;
    border-radius: var(--radius-xl);
    padding: 24px;
    margin: 32px 0;
    border: 1px solid var(--border);
}
.quick-ref-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 16px;
}
@media (min-width:640px) { .quick-ref-grid { grid-template-columns: 1fr 1fr; gap: 24px; } }
.ref-column { background: #151A21; padding: 20px; border-radius: var(--radius-lg); border: 1px solid var(--border); }
.ref-column h4 { color: #40E0FF; margin-bottom: 12px; }
.ref-column ul { margin: 0; }

/* Author bio */
.author-bio {
    background: #1E2630;
    border-radius: var(--radius-xl);
    padding: 28px 24px;
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    align-items: center;
    border: 1px solid var(--border);
}
@media (min-width:640px) { .author-bio { flex-direction: row; gap: 32px; padding: 40px; } }
.author-avatar-large {
    width: 100px; height: 100px;
    background: var(--cyan-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0B0D10;
    font-size: 2.5rem;
    font-weight: 700;
    flex-shrink: 0;
}
.author-bio h3 { margin: 0 0 8px; color: #E9EEF5; }
.author-bio p { margin-bottom: 12px; color: #C0C8D2; }
.author-bio a { color: #40E0FF; text-decoration: none; font-weight: 600; }

/* Related guides */
.related-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin: 24px 0;
}
@media (min-width:640px) { .related-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; } }
@media (min-width:1024px) { .related-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; } }
.related-card {
    background: #1E2630;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    text-decoration: none;
    transition: var(--transition);
    display: block;
}
.related-card:hover { border-color: #40E0FF; transform: translateY(-4px); }
.related-card h4 { color: #E9EEF5; margin-bottom: 8px; font-size: 1rem; font-weight: 700; }
.related-card p { color: #9AA5B5; font-size: 0.85rem; margin-bottom: 12px; }
.related-card span { color: #40E0FF; font-size: 0.85rem; font-weight: 600; }

/* Hidden SEO H1 */
.seo-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

/* Mobile responsive overrides */
@media (max-width: 768px) {
    .header-container { padding: 10px 14px; }
    .brand-name { font-size: 1.1rem; }
    .logo-icon { width: 34px; height: 34px; font-size: 1rem; }
    .kofi-link, .mobile-menu-btn { width: 38px; height: 38px; }
    .article-title { font-size: 1.5rem; }
    h2 { font-size: 1.3rem; }
    .preview-text { font-size: 1.8rem; }
}
@media (max-width: 480px) {
    .header-container { padding: 6px 10px; gap: 4px; }
    .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
    .brand-name { font-size: 0.95rem; }
    .slogan-badge { display: none; }
    .article-card { padding: 20px 16px; }
    .container { padding: 0 12px; }
    .preview-text { font-size: 1.5rem; }
    .anatomy-letter { font-size: 3rem; }
    .tester-input { min-width: 100%; }
    .tester-buttons { width: 100%; justify-content: center; }
    .personality-matrix { font-size: 0.75rem; }
    .personality-matrix th, .personality-matrix td { padding: 10px 6px; }
    .matrix-badge { font-size: 0.6rem; padding: 3px 6px; }
}

/* Notch Support */
@supports (padding: max(0px)) {
    .header-container, .container {
        padding-left: max(16px, env(safe-area-inset-left));
        padding-right: max(16px, env(safe-area-inset-right));
    }
}

/* Focus visibility */
a:focus-visible, button:focus-visible {
    outline: 3px solid #40E0FF;
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header, .mobile-menu-btn, .kofi-link, .guides-link, .back-link,
    .progress-bar, .font-tester, .jump-dropdown-container {
        display: none !important;
    }
    body { background: white; color: black; }
    .article-card { background: white; color: black; box-shadow: none; padding: 0; }
}