/* ══════════════════════════════════════════════════════════════
   P2P Bolivia ML — Documentation Premium CSS
   Dark theme · Sidebar · Scroll animations · Premium design
   ══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

:root {
  --bg: #050a14; --bg2: #0a0f1e; --bg3: #0d1425;
  --surface: rgba(12,20,38,.92); --surface2: rgba(18,28,50,.85);
  --glass: rgba(12,20,38,.6);
  --border: rgba(56,79,125,.18); --border-hover: rgba(59,130,246,.3);
  --text: #e2e8f0; --text2: #7a8baa; --text3: #4a5a78; --text-bright: #f8fafc;
  --blue: #3b82f6; --violet: #8b5cf6; --purple: #a855f7; --pink: #ec4899;
  --amber: #f59e0b; --green: #10b981; --red: #ef4444; --cyan: #06b6d4;
  --sidebar-w: 260px;
  --gradient-main: linear-gradient(135deg, #3b82f6, #8b5cf6, #ec4899);
  --radius: 16px; --radius-sm: 12px; --radius-xs: 8px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; scrollbar-width: thin; scrollbar-color: rgba(59,130,246,.3) transparent; }
body { font-family:'Inter',sans-serif; background:var(--bg); color:var(--text); min-height:100vh; line-height:1.65; }
::selection { background: rgba(59,130,246,.3); color: var(--text-bright); }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(59,130,246,.25); border-radius: 3px; }

/* ─── Animations ─── */
@keyframes fadeInUp { from { opacity:0; transform:translateY(20px); } to { opacity:1; transform:translateY(0); } }
@keyframes gradientShift { 0% { background-position:0% 50%; } 50% { background-position:100% 50%; } 100% { background-position:0% 50%; } }
.animate-in { opacity:0; transform:translateY(16px); transition: opacity .5s ease, transform .5s ease; }
.animate-in.visible { opacity:1; transform:translateY(0); }

/* ═══ SIDEBAR ═══ */
.sidebar {
  position: fixed; left: 0; top: 0; bottom: 0; width: var(--sidebar-w); z-index: 100;
  background: var(--surface); backdrop-filter: blur(20px);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow-y: auto;
}
.sidebar-header { padding: 24px 20px 16px; border-bottom: 1px solid rgba(255,255,255,.04); }
.sidebar-logo { display: flex; align-items: center; gap: 10px; font-size: .9rem; font-weight: 800; }
.sidebar-logo svg { width: 28px; height: 28px; }
.sidebar-logo span { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.sidebar-version { font-size: .62rem; color: var(--text3); margin-top: 4px; font-weight: 500; }

.sidebar-nav { flex: 1; padding: 16px 12px; display: flex; flex-direction: column; gap: 2px; }
.sidebar-nav a {
  display: block; padding: 8px 14px; border-radius: 8px;
  font-size: .76rem; font-weight: 500; color: var(--text2);
  text-decoration: none; transition: all var(--transition);
}
.sidebar-nav a:hover { color: var(--text); background: rgba(59,130,246,.06); }
.sidebar-nav a.active {
  color: var(--blue); background: rgba(59,130,246,.1);
  font-weight: 700; border-left: 3px solid var(--blue);
}

.sidebar-footer { padding: 16px 12px; border-top: 1px solid rgba(255,255,255,.04); display: flex; flex-direction: column; gap: 4px; }
.sidebar-footer a {
  display: block; padding: 8px 14px; border-radius: 8px;
  font-size: .7rem; font-weight: 600; color: var(--text2);
  text-decoration: none; transition: all var(--transition);
}
.sidebar-footer a:hover { color: var(--blue); background: rgba(59,130,246,.06); }

/* ═══ CONTENT ═══ */
.content { margin-left: var(--sidebar-w); min-height: 100vh; }

/* ═══ HERO ═══ */
.hero {
  position: relative; padding: 100px 60px 80px; overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 800px 500px at 30% 30%, rgba(59,130,246,.1), transparent),
    radial-gradient(ellipse 600px 400px at 70% 70%, rgba(139,92,246,.08), transparent),
    radial-gradient(ellipse 500px 300px at 50% 50%, rgba(236,72,153,.05), transparent);
}
.hero-content { position: relative; z-index: 1; max-width: 900px; }
.hero-badge {
  display: inline-block; font-size: .65rem; font-weight: 700; color: var(--text2);
  background: var(--glass); border: 1px solid var(--border); border-radius: 20px;
  padding: 5px 16px; margin-bottom: 20px; letter-spacing: .04em;
}
.hero-title { font-size: 3.2rem; font-weight: 900; letter-spacing: -.04em; line-height: 1.1; margin-bottom: 16px; }
.gradient-text {
  background: var(--gradient-main); background-size: 200% 200%;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  animation: gradientShift 5s ease infinite;
}
.hero-subtitle { font-size: 1.1rem; color: var(--text2); line-height: 1.7; max-width: 700px; margin-bottom: 32px; }
.hero-subtitle strong { color: var(--text); }

.hero-stats { display: flex; gap: 32px; margin-bottom: 36px; }
.hero-stat { text-align: center; }
.hero-stat-val { font-size: 1.6rem; font-weight: 900; color: var(--text-bright); font-family: 'JetBrains Mono', monospace; }
.hero-stat-label { font-size: .62rem; color: var(--text3); font-weight: 600; text-transform: uppercase; letter-spacing: .06em; margin-top: 2px; }

.hero-actions { display: flex; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 10px 24px;
  border-radius: 10px; font-size: .8rem; font-weight: 700; text-decoration: none;
  transition: all var(--transition); cursor: pointer; border: none; font-family: 'Inter', sans-serif;
}
.btn-primary { background: var(--blue); color: white; box-shadow: 0 4px 16px rgba(59,130,246,.3); }
.btn-primary:hover { background: #2563eb; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(59,130,246,.4); }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--blue); color: var(--blue); }
.btn-lg { padding: 14px 32px; font-size: .9rem; }

/* ═══ SECTIONS ═══ */
.doc-section { padding: 60px; border-bottom: 1px solid rgba(255,255,255,.03); }
.section-header { display: flex; align-items: baseline; gap: 14px; margin-bottom: 32px; }
.section-number {
  font-size: 2rem; font-weight: 900; font-family: 'JetBrains Mono', monospace;
  background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  opacity: .4; line-height: 1;
}
.section-header h2 { font-size: 1.6rem; font-weight: 800; letter-spacing: -.03em; }
.section-intro { color: var(--text2); margin-bottom: 24px; font-size: .92rem; }
.section-intro code { background: rgba(59,130,246,.1); color: var(--blue); padding: 2px 8px; border-radius: 4px; font-family: 'JetBrains Mono', monospace; font-size: .82rem; }

/* ─── Doc Cards ─── */
.doc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.doc-card {
  background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 28px; transition: all var(--transition);
}
.doc-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.doc-card-icon { font-size: 1.8rem; margin-bottom: 12px; }
.doc-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.doc-card p { font-size: .82rem; color: var(--text2); line-height: 1.7; }
.doc-card ul { list-style: none; margin-top: 8px; }
.doc-card ul li { font-size: .8rem; color: var(--text2); padding: 3px 0; padding-left: 16px; position: relative; }
.doc-card ul li::before { content: '→'; position: absolute; left: 0; color: var(--blue); font-weight: 700; }

.data-sources { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }
.data-src { font-size: .78rem; color: var(--text2); display: flex; align-items: center; gap: 8px; }
.ds-badge { font-size: .6rem; font-weight: 700; padding: 2px 8px; border-radius: 4px; text-transform: uppercase; letter-spacing: .04em; }
.ds-binance { background: rgba(245,158,11,.1); color: var(--amber); }
.ds-coingecko { background: rgba(16,185,129,.1); color: var(--green); }
.ds-tech { background: rgba(59,130,246,.1); color: var(--blue); }

/* ═══ ARCHITECTURE ═══ */
.arch-diagram {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 40px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.arch-layer { width: 100%; max-width: 800px; }
.arch-layer-title { text-align: center; margin-bottom: 12px; }
.arch-layer-badge {
  display: inline-block; font-size: .65rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .08em; padding: 4px 16px; border-radius: 16px;
  background: color-mix(in srgb, var(--c) 10%, transparent);
  color: var(--c); border: 1px solid color-mix(in srgb, var(--c) 20%, transparent);
}
.arch-items { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; }
.arch-models-row { gap: 14px; }
.arch-item {
  display: flex; align-items: center; gap: 10px; padding: 12px 18px;
  border-radius: var(--radius-xs); border: 1px solid var(--border);
  transition: all var(--transition); font-size: .78rem;
}
.arch-item:hover { transform: translateY(-2px); }
.ai-icon { font-size: 1.2rem; }
.ai-text strong { display: block; color: var(--text-bright); font-size: .78rem; }
.ai-text small { font-size: .62rem; color: var(--text3); }
.ai-data { background: rgba(6,182,212,.05); border-color: rgba(6,182,212,.12); }
.ai-model { background: rgba(139,92,246,.05); border-color: rgba(139,92,246,.12); }
.ai-lstm:hover { border-color: var(--blue); }
.ai-transformer:hover { border-color: var(--amber); }
.ai-tl:hover { border-color: var(--violet); }
.ai-eval { background: rgba(16,185,129,.05); border-color: rgba(16,185,129,.12); }
.arch-connector { color: var(--text3); font-size: 1.2rem; font-weight: 700; }
.arch-arrow-down { display: flex; justify-content: center; padding: 4px 0; opacity: .5; }

/* ═══ MODELS ═══ */
.model-detail {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 32px; margin-bottom: 20px;
  transition: all var(--transition);
}
.model-detail:hover { border-color: var(--border-hover); }
.model-detail-header { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; }
.model-badge { width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; flex-shrink: 0; }
.model-badge-lstm { background: rgba(59,130,246,.1); }
.model-badge-tf { background: rgba(245,158,11,.1); }
.model-badge-tl { background: rgba(139,92,246,.1); }
.model-detail-header h3 { font-size: 1.05rem; font-weight: 800; }
.model-subtitle { font-size: .76rem; color: var(--text2); margin-top: 2px; }
.tag-winner { font-size: .6rem; font-weight: 700; padding: 4px 12px; border-radius: 8px; background: rgba(16,185,129,.1); color: var(--green); border: 1px solid rgba(16,185,129,.2); margin-left: auto; }

.model-content { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.model-desc p { font-size: .82rem; color: var(--text2); line-height: 1.7; margin-bottom: 16px; }

.model-specs { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.spec { display: flex; justify-content: space-between; padding: 5px 0; border-bottom: 1px solid rgba(255,255,255,.03); font-size: .74rem; }
.spec:last-child { border: none; }
.spec-k { color: var(--text2); }
.spec-v { font-weight: 700; font-family: 'JetBrains Mono', monospace; font-size: .7rem; color: var(--text-bright); }

.model-formula { background: rgba(0,0,0,.2); border-radius: var(--radius-sm); padding: 20px; }
.model-formula h4 { font-size: .76rem; font-weight: 700; color: var(--text2); margin-bottom: 12px; text-transform: uppercase; letter-spacing: .06em; }
.formula-block { margin-bottom: 14px; }
.formula-block:last-child { margin-bottom: 0; }
.formula {
  font-family: 'JetBrains Mono', monospace; font-size: .78rem; color: var(--blue);
  background: rgba(59,130,246,.06); padding: 8px 14px; border-radius: 6px;
  border-left: 3px solid var(--blue); margin-bottom: 4px;
}
.formula-label { font-size: .62rem; color: var(--text3); padding-left: 14px; }

/* TL Phases */
.tl-phases { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.tl-phase { background: rgba(0,0,0,.15); border-radius: var(--radius-sm); padding: 16px; }
.tl-phase-header { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.tl-phase-badge { font-size: .6rem; font-weight: 700; padding: 3px 10px; border-radius: 6px; }
.tl-phase-1 { background: rgba(59,130,246,.12); color: var(--blue); }
.tl-phase-2 { background: rgba(139,92,246,.12); color: var(--violet); }
.tl-phase-title { font-size: .76rem; font-weight: 700; }

/* ═══ RESULTS ═══ */
.results-notice {
  display: flex; align-items: center; gap: 10px; padding: 14px 20px;
  background: rgba(16,185,129,.06); border: 1px solid rgba(16,185,129,.15);
  border-radius: var(--radius-sm); margin-bottom: 24px;
  font-size: .8rem; color: var(--text2);
}
.results-notice strong { color: var(--green); }
.subsection-title { font-size: 1.1rem; font-weight: 800; margin-top: 32px; margin-bottom: 8px; }
.subsection-desc { font-size: .82rem; color: var(--text2); margin-bottom: 16px; }

.results-table-wrap { overflow-x: auto; margin-bottom: 24px; }
.results-table {
  width: 100%; border-collapse: collapse; font-size: .8rem;
  background: var(--surface2); border-radius: var(--radius-sm); overflow: hidden;
}
.results-table th, .results-table td { padding: 12px 18px; text-align: left; border-bottom: 1px solid rgba(255,255,255,.04); }
.results-table th { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--text2); background: rgba(0,0,0,.2); }
.results-table td { font-family: 'JetBrains Mono', monospace; font-size: .76rem; }
.results-table td strong { font-family: 'Inter', sans-serif; font-weight: 700; color: var(--text); }
.results-table tr:hover td { background: rgba(59,130,246,.03); }
.col-lstm { color: var(--blue); } .col-tf { color: var(--amber); } .col-tl { color: var(--violet); }
td.best { font-weight: 800; position: relative; }
td.best::after { content: '✓'; margin-left: 6px; font-size: .6rem; color: var(--green); }

.stat-test-box {
  background: rgba(59,130,246,.05); border: 1px solid rgba(59,130,246,.15);
  border-radius: var(--radius-sm); padding: 20px 24px; margin-bottom: 24px;
}
.stat-test-box h4 { font-size: .85rem; font-weight: 700; margin-bottom: 8px; }
.stat-test-box p { font-size: .82rem; color: var(--text2); }
.stat-test-box strong { color: var(--green); }

/* ═══ METHODOLOGY ═══ */
.methodology-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.method-card {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 28px; transition: all var(--transition);
}
.method-card:hover { border-color: var(--border-hover); }
.method-card h4 { font-size: .9rem; font-weight: 700; margin-bottom: 12px; }
.method-card ul { list-style: none; }
.method-card li { font-size: .78rem; color: var(--text2); padding: 4px 0 4px 18px; position: relative; line-height: 1.6; }
.method-card li::before { content: '•'; position: absolute; left: 0; color: var(--blue); font-weight: 700; }
.method-card li strong { color: var(--text); }

/* ═══ API DOCS ═══ */
.api-endpoints { display: flex; flex-direction: column; gap: 12px; }
.api-endpoint {
  display: flex; align-items: center; gap: 14px; padding: 14px 20px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); transition: all var(--transition);
}
.api-endpoint:hover { border-color: var(--border-hover); }
.api-method {
  font-size: .6rem; font-weight: 800; padding: 4px 10px; border-radius: 4px;
  text-transform: uppercase; letter-spacing: .06em; flex-shrink: 0;
}
.api-method.get { background: rgba(16,185,129,.12); color: var(--green); }
.api-method.post { background: rgba(59,130,246,.12); color: var(--blue); }
.api-path { font-family: 'JetBrains Mono', monospace; font-size: .82rem; font-weight: 600; color: var(--text-bright); }
.api-desc { font-size: .76rem; color: var(--text2); margin-left: auto; }

.api-detail {
  background: rgba(0,0,0,.15); border-radius: var(--radius-sm);
  padding: 20px 24px; margin-top: -6px; margin-bottom: 8px;
}
.api-detail h4 { font-size: .7rem; font-weight: 700; color: var(--text2); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px; margin-top: 14px; }
.api-detail h4:first-child { margin-top: 0; }
pre {
  background: rgba(0,0,0,.3); border: 1px solid rgba(255,255,255,.05);
  border-radius: var(--radius-xs); padding: 16px 20px; overflow-x: auto;
  margin-bottom: 4px;
}
code {
  font-family: 'JetBrains Mono', monospace; font-size: .74rem;
  color: var(--cyan); line-height: 1.7;
}

/* ═══ INSTALLATION ═══ */
.install-steps { display: flex; flex-direction: column; gap: 16px; }
.install-step {
  display: flex; gap: 20px; padding: 20px 24px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--radius); transition: all var(--transition);
}
.install-step:hover { border-color: var(--border-hover); }
.step-number {
  width: 36px; height: 36px; border-radius: 10px; flex-shrink: 0;
  background: rgba(59,130,246,.1); color: var(--blue);
  display: flex; align-items: center; justify-content: center;
  font-weight: 900; font-size: .9rem; font-family: 'JetBrains Mono', monospace;
}
.step-content { flex: 1; }
.step-content h4 { font-size: .88rem; font-weight: 700; margin-bottom: 10px; }
.step-content pre { margin-top: 8px; }

/* ═══ DASHBOARD CTA ═══ */
.dashboard-cta {
  text-align: center; padding: 60px 40px;
  background: linear-gradient(135deg, rgba(59,130,246,.06), rgba(139,92,246,.06), rgba(236,72,153,.06));
  border: 1px solid var(--border); border-radius: var(--radius);
}
.dashboard-cta h2 { font-size: 1.6rem; font-weight: 900; margin-bottom: 10px; }
.dashboard-cta p { color: var(--text2); margin-bottom: 24px; font-size: .92rem; }

/* ═══ FOOTER ═══ */
.doc-footer { padding: 32px 60px; text-align: center; border-top: 1px solid var(--border); }
.doc-footer p { font-size: .72rem; color: var(--text3); }
.doc-footer-tech { margin-top: 4px; font-size: .62rem; color: var(--text3); opacity: .6; }

/* ═══ RESPONSIVE ═══ */
@media (max-width: 1100px) {
  .sidebar { display: none; }
  .content { margin-left: 0; }
  .doc-section { padding: 40px 28px; }
  .hero { padding: 60px 28px 50px; }
  .model-content { grid-template-columns: 1fr; }
  .tl-phases { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .doc-grid, .methodology-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 2rem; }
  .hero-stats { flex-wrap: wrap; gap: 20px; }
  .arch-items { flex-direction: column; }
  .arch-connector { transform: rotate(90deg); }
  .model-specs { grid-template-columns: 1fr; }
}