/* ==========================================================================
   Katakata Font-Lab - Beautiful Design System & Typography Stylesheet
   ========================================================================== */

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

:root {
    --bg-mesh-1: rgba(191, 239, 255, 0.6);
    --bg-mesh-2: rgba(209, 250, 229, 0.5);
    --bg-mesh-3: rgba(254, 240, 138, 0.4);
    --bg-mesh-4: rgba(251, 207, 232, 0.5);
    
    --card-bg: rgba(255, 255, 255, 0.75);
    --card-border: rgba(255, 255, 255, 0.8);
    --card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.04);
    
    --text-main: #1e293b;     /* slate-800 */
    --text-muted: #475569;    /* slate-600 */
    --text-light: #64748b;    /* slate-500 */
    --border-color: #e2e8f0;  /* slate-200 */
    
    --primary: #6366f1;       /* Indigo */
    --primary-hover: #4f46e5;
    --primary-light: #e0e7ff;
    
    --accent-sky: #0ea5e9;
    --accent-emerald: #10b981;
}

body {
    font-family: 'Zen Maru Gothic', 'Noto Sans JP', sans-serif;
    color: var(--text-main);
    background-color: #fcfbfa;
    background-image: 
        radial-gradient(circle at 10% 15%, var(--bg-mesh-1) 0%, transparent 45%),
        radial-gradient(circle at 85% 15%, var(--bg-mesh-2) 0%, transparent 45%),
        radial-gradient(circle at 50% 85%, var(--bg-mesh-3) 0%, transparent 55%),
        radial-gradient(circle at 85% 85%, var(--bg-mesh-4) 0%, transparent 45%);
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-size: cover;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
    overflow-x: hidden;
    font-feature-settings: "palt", "chws";
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* Subtle dot grid overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image: radial-gradient(#cbd5e1 1.2px, transparent 1.2px);
    background-size: 28px 28px;
    opacity: 0.35;
    pointer-events: none;
}

/* --- Dark Mode Variables --- */
body.dark-mode {
    --bg-mesh-1: rgba(56, 189, 248, 0.12);
    --bg-mesh-2: rgba(16, 185, 129, 0.08);
    --bg-mesh-3: rgba(245, 158, 11, 0.08);
    --bg-mesh-4: rgba(236, 72, 153, 0.08);
    
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.05);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
    
    --text-main: #f8fafc;     /* slate-50 */
    --text-muted: #cbd5e1;    /* slate-300 */
    --text-light: #94a3b8;    /* slate-400 */
    --border-color: #334155;  /* slate-700 */
    
    --primary-light: rgba(99, 102, 241, 0.15);
    
    background-color: #0b0f19;
}

body.dark-mode::before {
    background-image: radial-gradient(#334155 1.2px, transparent 1.2px);
    opacity: 0.25;
}

/* --- Accessiblity: Focus Styles --- */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 3px solid #38bdf8;
    outline-offset: 4px;
    border-radius: 8px;
}

/* --- Header Style --- */
.fontlab-header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 4px 24px -12px rgba(0, 0, 0, 0.04);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background 0.4s ease, border-color 0.4s ease;
}
body.dark-mode .fontlab-header {
    background: rgba(11, 15, 25, 0.8);
    border-bottom-color: rgba(255, 255, 255, 0.05);
}

.header-container {
    max-w: 1200px;
    margin: 0 auto;
    padding: 0.8rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: var(--text-main);
}
.logo-icon {
    background: linear-gradient(135deg, var(--primary), #a78bfa);
    color: white;
    width: 38px;
    height: 38px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}
.logo-text {
    font-family: 'Zen Maru Gothic', sans-serif;
    font-weight: 900;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.header-nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 800;
    transition: color 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 0.5rem;
}
.header-nav-link:hover {
    color: var(--primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.header-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}
.header-btn:hover {
    transform: scale(1.05);
    background: white;
    border-color: var(--primary);
    color: var(--primary);
}
body.dark-mode .header-btn:hover {
    background: #1e293b;
}

@media (max-width: 768px) {
    .header-nav { display: none; }
    .header-btn {
        width: 48px;
        height: 48px;
    }
}

/* --- Layout Container --- */
.container {
    max-w: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem 6rem 1.5rem;
    width: 100%;
}

/* --- Hero Section --- */
.hero {
    text-align: center;
    padding: 3rem 1rem 4rem 1rem;
}
.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 900;
    font-size: 0.75rem;
    padding: 0.4rem 1.25rem;
    border-radius: 999px;
    margin-bottom: 1.5rem;
    box-shadow: inset 0 0 0 1px rgba(99, 102, 241, 0.1);
}
.hero-title {
    font-family: 'Zen Maru Gothic', sans-serif;
    font-weight: 900;
    font-size: 2.75rem;
    line-height: 1.3;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-main) 30%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-desc {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-muted);
    max-w: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

@media (max-width: 768px) {
    .hero-title { font-size: 2rem; }
    .hero-desc { font-size: 0.95rem; }
}

/* --- Section Styling --- */
.section-title {
    font-weight: 900;
    font-size: 1.75rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}
.section-title-icon {
    background: var(--primary-light);
    color: var(--primary);
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* --- Glassmorphism Card System --- */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 28px;
    padding: 2.2rem;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
}
.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.9);
}
body.dark-mode .glass-card:hover {
    border-color: rgba(255, 255, 255, 0.1);
}

/* ==========================================================================
   INTERACTIVE SIMULATOR (Column 1)
   ========================================================================== */
.simulator-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 2rem;
    margin-bottom: 5rem;
}

@media (max-width: 1024px) {
    .simulator-layout {
        grid-template-columns: 1fr;
    }
}

/* Simulator Canvas */
.canvas-card {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.canvas-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}
.device-toggles {
    display: flex;
    background: rgba(0,0,0,0.03);
    padding: 0.2rem;
    border-radius: 12px;
}
body.dark-mode .device-toggles {
    background: rgba(255,255,255,0.03);
}
.device-btn {
    border: none;
    background: transparent;
    color: var(--text-light);
    width: 38px;
    height: 38px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}
.device-btn.active {
    background: white;
    color: var(--primary);
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}
body.dark-mode .device-btn.active {
    background: #1e293b;
}

.preview-container-wrapper {
    background: rgba(255, 255, 255, 0.5);
    border: 1px dashed var(--border-color);
    border-radius: 20px;
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 350px;
    transition: background 0.4s ease;
}
body.dark-mode .preview-container-wrapper {
    background: rgba(15, 23, 42, 0.3);
}

.preview-container {
    width: 100%;
    max-width: 100%;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
    min-height: 250px;
    color: #1e293b; /* Always high contrast in preview paper */
}
.preview-container.mobile-mode {
    max-width: 375px;
    min-height: 500px;
    padding: 1.5rem 1rem;
}

/* Editable Areas */
.preview-title {
    outline: none;
    margin-bottom: 1rem;
    word-break: break-word;
}
.preview-paragraph {
    outline: none;
    margin-bottom: 2rem;
    word-break: break-word;
}
.preview-button-wrapper {
    display: flex;
    justify-content: flex-start;
}
.preview-button {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 9999px;
    padding: 0.8rem 2rem;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

/* Control Panel */
.control-card {
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}
.control-title {
    font-weight: 900;
    font-size: 1.1rem;
    border-bottom: 1.5px dashed var(--border-color);
    padding-bottom: 0.6rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.control-label {
    font-size: 0.8rem;
    font-weight: 900;
    color: var(--text-light);
    display: flex;
    justify-content: space-between;
}
.control-value {
    color: var(--primary);
    font-weight: bold;
}

.control-select {
    width: 100%;
    padding: 0.8rem 1rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-main);
    font-weight: bold;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s;
}
.control-select:focus {
    border-color: var(--primary);
}

.control-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
}
.control-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    transition: transform 0.1s;
}
.control-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

/* 3D bounce buttons */
.btn-primary-3d {
    background: var(--primary);
    color: white;
    border: none;
    border-bottom: 4px solid var(--primary-hover);
    padding: 0.9rem 1.5rem;
    border-radius: 16px;
    font-weight: 800;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.15s cubic-bezier(0.34, 1.56, 0.64, 1);
    min-height: 48px;
    width: 100%;
}
.btn-primary-3d:hover {
    transform: translateY(-2px);
    border-bottom-width: 6px;
}
.btn-primary-3d:active {
    transform: translateY(2px);
    border-bottom-width: 1px;
}

/* ==========================================================================
   FONT SHOWCASE - 見本市 (Column 2)
   ========================================================================== */
.font-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
    margin-bottom: 5rem;
}

.font-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    border-top: 4px solid var(--primary);
}
.font-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 36px rgba(99, 102, 241, 0.08);
}
.font-card.rounded-gothic { border-top-color: #0ea5e9; }
.font-card.zen-maru { border-top-color: #10b981; }
.font-card.hand-writing { border-top-color: #f59e0b; }
.font-card.dela-gothic { border-top-color: #ec4899; }

.font-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}
.font-name {
    font-weight: 900;
    font-size: 1.35rem;
}
.font-type-badge {
    background: rgba(0, 0, 0, 0.04);
    font-size: 0.7rem;
    font-weight: 900;
    padding: 0.25rem 0.75rem;
    border-radius: 99px;
    color: var(--text-light);
}
body.dark-mode .font-type-badge {
    background: rgba(255, 255, 255, 0.04);
}

.font-meta-tag {
    display: inline-flex;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 900;
    margin-bottom: 1rem;
}
.tag-mplus { background: #e0f2fe; color: #0369a1; }
.tag-zen { background: #d1fae5; color: #047857; }
.tag-noto { background: #e0e7ff; color: #4338ca; }
.tag-kiwi { background: #fef3c7; color: #b45309; }
.tag-yomogi { background: #fae8ff; color: #a21caf; }
.tag-dela { background: #ffe4e6; color: #be123c; }

body.dark-mode .tag-mplus { background: rgba(14, 165, 233, 0.15); color: #38bdf8; }
body.dark-mode .tag-zen { background: rgba(16, 185, 129, 0.15); color: #34d399; }
body.dark-mode .tag-noto { background: rgba(99, 102, 241, 0.15); color: #818cf8; }
body.dark-mode .tag-kiwi { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
body.dark-mode .tag-yomogi { background: rgba(217, 70, 239, 0.15); color: #e879f9; }
body.dark-mode .tag-dela { background: rgba(244, 63, 94, 0.15); color: #fb7185; }

.font-preview-box {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.6;
    transition: background 0.4s ease;
}
body.dark-mode .font-preview-box {
    background: rgba(15, 23, 42, 0.25);
}

/* Weight Meter */
.font-meter-section {
    border-t: 1px dashed var(--border-color);
    padding-top: 1rem;
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.meter-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    font-weight: 900;
}
.meter-label { color: var(--text-light); }
.meter-value { font-weight: bold; }
.meter-bar-container {
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}
.meter-bar {
    height: 100%;
    background: var(--primary);
    border-radius: 3px;
}
.meter-bar.blue { background: #0ea5e9; }
.meter-bar.green { background: #10b981; }
.meter-bar.amber { background: #f59e0b; }
.meter-bar.rose { background: #f43f5e; }

/* ==========================================================================
   TECHNICAL ARTICLES - 技術コラム (Column 3)
   ========================================================================== */
.article-section {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.article-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 32px;
    padding: 3rem;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}
@media (max-width: 768px) {
    .article-card {
        padding: 1.5rem;
    }
}

.article-header {
    border-b: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
}
.article-meta {
    display: flex;
    gap: 1rem;
    align-items: center;
    font-size: 0.8rem;
    font-weight: 900;
    color: var(--text-light);
    margin-bottom: 0.75rem;
}
.article-badge {
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.2rem 0.75rem;
    border-radius: 99px;
}
.article-title {
    font-weight: 900;
    font-size: 1.8rem;
    line-height: 1.4;
    color: var(--text-main);
}
@media (max-width: 768px) {
    .article-title {
        font-size: 1.35rem;
    }
}

.article-body {
    font-size: 1.05rem;
    line-height: 1.95;
    color: var(--text-muted);
}
.article-body p {
    margin-bottom: 1.5rem;
}
.article-body h3 {
    font-weight: 900;
    font-size: 1.25rem;
    color: var(--text-main);
    margin: 2.5rem 0 1rem 0;
    padding-left: 0.6rem;
    border-left: 4px solid var(--primary);
}
.article-body strong {
    font-weight: 900;
    background: linear-gradient(transparent 60%, rgba(254, 240, 138, 0.6) 60%);
    padding: 0 0.2rem;
    color: var(--text-main);
}
body.dark-mode .article-body strong {
    background: linear-gradient(transparent 60%, rgba(99, 102, 241, 0.3) 60%);
}

.article-body code {
    background: rgba(0, 0, 0, 0.04);
    padding: 0.2rem 0.4rem;
    border-radius: 6px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 0.9rem;
    color: #c2410c;
}
body.dark-mode .article-body code {
    background: rgba(255, 255, 255, 0.06);
    color: #f97316;
}

/* Fenced code block style */
.article-code-block {
    background: #0f172a;
    color: #e2e8f0;
    padding: 1.5rem;
    border-radius: 20px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.7;
    overflow-x: auto;
    margin: 1.5rem 0;
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
}
.code-block-header {
    position: absolute;
    top: 0.5rem;
    right: 1rem;
    font-size: 0.7rem;
    color: #64748b;
    font-weight: bold;
    text-transform: uppercase;
}

footer p.text-slate-400 {
    color: #64748b !important;
}

/* ==========================================================================
   REFACORING STYLES (v3.9.0) - Loaders, Tabs & Dark Paper
   ========================================================================== */

/* 1. Loading Status Overlay */
.preview-container-wrapper {
    position: relative;
}
.font-load-status {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(15, 23, 42, 0.85);
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.font-load-status.active {
    opacity: 1;
    transform: translateY(0);
}
.font-load-status.success {
    background: #10b981;
}

.spinner-icon {
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

.preview-container {
    transition: opacity 0.2s ease, all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.preview-container.loading {
    opacity: 0.6;
}

/* 2. Paper Dark Mode Sync */
body.dark-mode .preview-container {
    background: #1e293b !important;
    border-color: #334155 !important;
    color: #f8fafc !important;
}
body.dark-mode .preview-container .preview-button {
    background: #f8fafc;
    color: #1e293b;
    box-shadow: 0 4px 14px rgba(255, 255, 255, 0.1);
}

/* 3. Code Copier Tabs */
.code-tabs {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background: #0f172a;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    margin: 0.5rem 0;
}
.code-tabs-header {
    display: flex;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 0.25rem;
}
.code-tab-btn {
    border: none;
    background: transparent;
    color: #64748b;
    font-weight: 800;
    font-size: 0.75rem;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
}
.code-tab-btn:hover {
    color: #e2e8f0;
}
.code-tab-btn.active {
    background: rgba(255, 255, 255, 0.08);
    color: white;
}
.code-tab-panel {
    display: none;
}
.code-tab-panel.active {
    display: block;
}

/* 4. Showcase Title & Paragraph Sync */
.font-preview-box {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.font-preview-title {
    font-size: 1.15rem;
    font-weight: bold;
    color: var(--text-main);
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 0.4rem;
}
.font-preview-para {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-muted);
}

/* --- Footer --- */
.fontlab-footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 4rem 1.5rem;
    text-align: center;
    margin-top: auto;
}
.footer-text {
    font-weight: 900;
    color: var(--text-light);
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}
.footer-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px 24px;
}
.footer-nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    min-height: 48px;
    padding: 4px 12px;
    transition: color 0.2s;
}
.footer-nav-link:hover {
    color: var(--primary);
}

/* --- Scroll To Top --- */
.scroll-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--card-bg);
    color: var(--primary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transform: translateY(15px);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
    z-index: 100;
}
.scroll-btn.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}
.scroll-btn:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    background: white;
}
body.dark-mode .scroll-btn:hover {
    background: #1e293b;
}

@media (max-width: 768px) {
    .scroll-btn {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 48px;
        height: 48px;
    }
}

/* --- Code Highlight Token Colors (v4.0.0) --- */
.hl-selector { color: #f472b6 !important; font-weight: bold; }  /* Pink */
.hl-property { color: #38bdf8 !important; }  /* Light Blue */
.hl-value { color: #fbbf24 !important; }     /* Amber */
.hl-comment { color: #64748b !important; font-style: italic; } /* Slate */
.hl-tag { color: #f472b6 !important; }       /* Pink */
.hl-attr { color: #fbbf24 !important; }      /* Amber */
.hl-string { color: #34d399 !important; }    /* Emerald */