/* =========================================================
   RutRoh — 2026 Design System
   Premium dark UI with depth, motion, and presence.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ---- TOKENS ---- */
:root {
    /* Surfaces */
    --bg: #06060a;
    --bg-subtle: #0a0a10;
    --surface: #0f0f16;
    --surface-raised: #141420;
    --surface-hover: #1a1a28;
    --surface-glass: rgba(14,14,22,0.7);

    /* Borders */
    --border: rgba(255,255,255,0.06);
    --border-hover: rgba(255,255,255,0.12);
    --border-vivid: rgba(129,140,248,0.25);

    /* Text */
    --text: #f0f0f5;
    --text-secondary: #a8a8b8;
    --text-muted: #64647a;
    --text-dim: #44445a;

    /* Accent */
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-dim: rgba(129,140,248,0.08);
    --accent-glow: rgba(129,140,248,0.12);
    --accent-strong: rgba(129,140,248,0.25);

    /* Status */
    --green: #34d399;
    --green-dim: rgba(52,211,153,0.08);
    --orange: #fbbf24;
    --orange-dim: rgba(251,191,36,0.08);
    --red: #f87171;
    --red-dim: rgba(248,113,113,0.08);

    /* Phoebe */
    --phoebe-gold: #f5a623;
    --phoebe-orange: #e8793a;
    --phoebe-glow: rgba(245,166,35,0.15);

    /* Effects */
    --radius: 14px;
    --radius-lg: 20px;
    --radius-pill: 100px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.5);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.6);
    --shadow-glow: 0 0 60px rgba(129,140,248,0.06);
    --shadow-accent: 0 4px 32px rgba(129,140,248,0.15);

    /* Gradients */
    --gradient-hero: linear-gradient(180deg, rgba(129,140,248,0.04) 0%, transparent 60%);
    --gradient-card: linear-gradient(145deg, var(--surface) 0%, rgba(129,140,248,0.015) 100%);
    --gradient-shine: linear-gradient(90deg, transparent, rgba(255,255,255,0.03), transparent);
    --gradient-text: linear-gradient(135deg, #f0f0f5 30%, #818cf8 100%);
    --gradient-accent-bar: linear-gradient(90deg, transparent, var(--accent-glow), transparent);

    /* Motion */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 0.15s;
    --duration: 0.25s;
    --duration-slow: 0.5s;
}

/* ---- RESET ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ---- GLOBAL LINKS ---- */
a { color: var(--accent); text-decoration: none; transition: color var(--duration); }
a:hover { color: var(--accent-hover); }

/* ---- SELECTION ---- */
::selection { background: rgba(129,140,248,0.3); color: #fff; }

/* =========================================================
   NAVIGATION
   ========================================================= */
nav {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 0 28px;
    height: 60px;
    display: flex;
    align-items: center;
    gap: 24px;
    border-bottom: 1px solid var(--border);
    background: rgba(6,6,10,0.75);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
}

nav .logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
nav .logo img { height: 22px; opacity: 0.9; transition: opacity var(--duration); }
nav .logo:hover img { opacity: 1; }

nav .nav-links { display: flex; gap: 4px; margin-left: auto; }
nav .nav-links a {
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 500;
    padding: 7px 14px;
    border-radius: 10px;
    transition: all var(--duration) var(--ease-out);
    text-decoration: none;
    position: relative;
}
nav .nav-links a:hover {
    color: var(--text);
    background: rgba(255,255,255,0.04);
}
nav .nav-links a.active {
    color: var(--accent);
    background: var(--accent-dim);
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
    text-align: center;
    padding: 100px 24px 80px;
    position: relative;
    overflow: hidden;
}

/* Ambient glow orbs */
.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(129,140,248,0.07) 0%, rgba(52,211,153,0.03) 40%, transparent 70%);
    pointer-events: none;
    animation: hero-breathe 8s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    top: 20%;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(245,166,35,0.04) 0%, transparent 70%);
    pointer-events: none;
    animation: hero-breathe 12s ease-in-out infinite reverse;
}

@keyframes hero-breathe {
    0%, 100% { opacity: 1; transform: translateX(-50%) scale(1); }
    50% { opacity: 0.6; transform: translateX(-50%) scale(1.1); }
}

.hero img.logo-hero {
    width: 180px;
    max-width: 50%;
    margin-bottom: 28px;
    filter: drop-shadow(0 0 40px rgba(129,140,248,0.1));
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 16px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 1;
}

.hero .subtitle {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--text-secondary);
    max-width: 540px;
    margin: 0 auto 32px;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.hero .badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--green);
    padding: 10px 22px;
    border-radius: var(--radius-pill);
    font-size: 0.78rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
    position: relative;
    z-index: 1;
    box-shadow: var(--shadow-md);
}

.hero .badge::before {
    content: '';
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 12px rgba(52,211,153,0.6);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; box-shadow: 0 0 4px rgba(52,211,153,0.6); }
    50% { opacity: 0.6; box-shadow: 0 0 16px rgba(52,211,153,0.4), 0 0 4px rgba(52,211,153,0.8); }
}

/* =========================================================
   SECTIONS
   ========================================================= */
.section {
    max-width: 1000px;
    margin: 0 auto;
    padding: 72px 24px;
}

.section-header {
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 8px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.section-divider {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
    margin: 0;
}

/* =========================================================
   CARD GRID
   ========================================================= */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 16px;
}

.card {
    background: var(--gradient-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--duration-slow) var(--ease-out);
    position: relative;
    overflow: hidden;
}

/* Top shine line */
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-accent-bar);
    opacity: 0;
    transition: opacity var(--duration-slow);
}

/* Hover glow */
.card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 120%, var(--accent-dim) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--duration-slow);
    pointer-events: none;
}

.card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow), var(--shadow-md);
}

.card:hover::before { opacity: 1; }
.card:hover::after { opacity: 1; }

.card .icon {
    font-size: 1.8rem;
    margin-bottom: 14px;
    display: block;
    position: relative;
    z-index: 1;
}

.card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
    position: relative;
    z-index: 1;
}

.card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.card .status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    margin-top: 14px;
    position: relative;
    z-index: 1;
}

.card .status::before {
    content: '';
    width: 5px;
    height: 5px;
    border-radius: 50%;
}

.card .status.active { background: var(--green-dim); color: var(--green); }
.card .status.active::before { background: var(--green); box-shadow: 0 0 6px rgba(52,211,153,0.5); }
.card .status.building { background: var(--accent-dim); color: var(--accent); }
.card .status.building::before { background: var(--accent); }
.card .status.planned { background: var(--orange-dim); color: var(--orange); }
.card .status.planned::before { background: var(--orange); }

/* =========================================================
   STATS ROW
   ========================================================= */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.stat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    transition: all var(--duration) var(--ease-out);
    position: relative;
    overflow: hidden;
}

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

.stat .value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: -0.04em;
    line-height: 1.2;
}

.stat .label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 4px;
    font-weight: 500;
}

/* =========================================================
   BLOG LIST
   ========================================================= */
.blog-container {
    max-width: 740px;
    margin: 0 auto;
    padding: 56px 24px 96px;
}

.blog-container > h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 8px;
}

.blog-container > .desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 40px;
}

.post-list { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.post-list li { display: block; }

.post-list li a {
    display: block;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 28px;
    transition: all var(--duration-slow) var(--ease-out);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.post-list li a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent);
    opacity: 0;
    transition: opacity var(--duration);
    border-radius: 0 2px 2px 0;
}

.post-list li a::after {
    content: '\2192';
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%) translateX(8px);
    opacity: 0;
    color: var(--accent);
    font-size: 1.2rem;
    transition: all var(--duration) var(--ease-out);
}

.post-list li a:hover {
    border-color: var(--border-hover);
    transform: translateX(6px);
    box-shadow: var(--shadow-sm);
    background: var(--surface-raised);
}

.post-list li a:hover::before { opacity: 1; }
.post-list li a:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
}

.post-list h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
    letter-spacing: -0.01em;
    padding-right: 32px;
}

.post-list .meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.post-list .date {
    font-size: 0.73rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.post-list .tag {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-dim);
    padding: 2px 10px;
    border-radius: var(--radius-pill);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.post-list p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin: 0;
}

/* =========================================================
   BLOG POST (ARTICLE)
   ========================================================= */
.article-container {
    max-width: 700px;
    margin: 0 auto;
    padding: 56px 24px 96px;
}

.article-container .article-header {
    margin-bottom: 44px;
    padding-bottom: 36px;
    border-bottom: 1px solid var(--border);
}

.article-container h1 {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.2;
    margin-bottom: 16px;
}

.article-container .article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.article-container .article-meta .date {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.article-container .article-meta .author {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.article-container .article-meta .reading-time {
    font-size: 0.73rem;
    color: var(--text-muted);
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 3px 12px;
    border-radius: var(--radius-pill);
    font-family: 'JetBrains Mono', monospace;
}

.article-container .hero-image {
    width: 100%;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-bottom: 36px;
}

/* Article body */
.article-body h2 {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 48px 0 18px;
    padding-top: 8px;
}

.article-body h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 32px 0 12px;
}

.article-body p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
    line-height: 1.8;
}

.article-body strong { color: var(--text); font-weight: 600; }

.article-body a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(129,140,248,0.3);
    transition: text-decoration-color var(--duration);
}

.article-body a:hover { text-decoration-color: var(--accent); }

.article-body ul, .article-body ol {
    margin: 0 0 20px 20px;
    color: var(--text-secondary);
}

.article-body li {
    margin-bottom: 10px;
    font-size: 0.95rem;
    line-height: 1.7;
}

.article-body li::marker { color: var(--accent); }

.article-body hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
    margin: 40px 0;
}

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

.article-body blockquote {
    border-left: 3px solid var(--accent);
    padding: 16px 24px;
    margin: 28px 0;
    background: var(--accent-dim);
    border-radius: 0 var(--radius) var(--radius) 0;
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
}

.article-body code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.84em;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    padding: 2px 7px;
    border-radius: 6px;
    color: var(--accent);
}

.article-body pre {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    overflow-x: auto;
    margin: 28px 0;
}

.article-body pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.82rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.article-body img {
    max-width: 100%;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin: 28px 0;
}

/* Article footer */
.article-footer {
    margin-top: 56px;
    padding-top: 36px;
    border-top: 1px solid var(--border);
}

.article-footer .back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: all var(--duration);
    padding: 8px 16px;
    border-radius: 10px;
    margin-left: -16px;
}

.article-footer .back-link:hover {
    color: var(--accent);
    background: var(--accent-dim);
    text-decoration: none;
}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 36px 24px;
    text-align: center;
    color: var(--text-dim);
    font-size: 0.78rem;
}

.site-footer a { color: var(--text-muted); }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .hero .subtitle { font-size: 1rem; }
    .hero { padding: 72px 20px 60px; }
    .card-grid { grid-template-columns: 1fr; }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .article-container h1 { font-size: 1.6rem; }
    nav { padding: 0 16px; height: 54px; }
    nav .nav-links a { padding: 6px 10px; font-size: 0.78rem; }
}

@media (max-width: 480px) {
    .stats-row { grid-template-columns: 1fr; }
    .hero h1 { font-size: 1.7rem; }
    .section { padding: 48px 16px; }
}