/* ══════════════════════════════════════════════════════════════════════
   UNPChainDB Website – Custom Styles
   ══════════════════════════════════════════════════════════════════════ */

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

:root {
  --bg:          #06060e;
  --bg-surface:  #0c0c1d;
  --bg-card:     rgba(255,255,255,0.04);
  --border:      rgba(255,255,255,0.08);
  --text:        #e2e8f0;
  --text-muted:  #94a3b8;
  --primary:     #3b82f6;
  --accent:      #8b5cf6;
  --pink:        #ec4899;
  --cyan:        #22d3ee;
  --glow:        rgba(99,102,241,0.15);
  --radius:      12px;
  --radius-lg:   20px;
  --transition:  0.3s cubic-bezier(.4,0,.2,1);
  --font:        'Inter', system-ui, -apple-system, sans-serif;
  --mono:        'JetBrains Mono', 'Fira Code', monospace;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: var(--cyan); text-decoration: none; transition: color var(--transition); }
a:hover { color: #67e8f9; }

code { font-family: var(--mono); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ── Gradient Text ──────────────────────────────────────────────────── */
.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--accent), var(--pink));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── Particle Canvas ────────────────────────────────────────────────── */
#particles {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ── Navigation ─────────────────────────────────────────────────────── */
#navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 24px;
  backdrop-filter: blur(16px) saturate(1.8);
  -webkit-backdrop-filter: blur(16px) saturate(1.8);
  background: rgba(6,6,14,0.7);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition);
}
#navbar.scrolled { background: rgba(6,6,14,0.92); box-shadow: 0 4px 30px rgba(0,0,0,0.4); }

.nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex; align-items: center;
  text-decoration: none;
}
.nav-logo { width: 100px; height: auto; }
.footer-logo { width: 100px; height: auto; margin-bottom: 8px; }

.nav-links { display: flex; gap: 32px; }
.nav-links a { color: var(--text-muted); font-size: 0.9rem; font-weight: 500; transition: color var(--transition); }
.nav-links a:hover { color: #fff; }

.nav-github { color: var(--text-muted); transition: color var(--transition); }
.nav-github:hover { color: #fff; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text); transition: var(--transition); }

/* ── Hero ───────────────────────────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  z-index: 1;
}

.hero-content { position: relative; z-index: 2; max-width: 800px; }

.hero-badge {
  display: inline-block;
  padding: 6px 20px;
  border-radius: 999px;
  background: rgba(99,102,241,0.12);
  border: 1px solid rgba(99,102,241,0.25);
  color: var(--cyan);
  font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 28px;
  animation: pulse-glow 3s ease-in-out infinite;
}

#hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 36px;
  min-height: 1.6em;
}

.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 0.95rem; font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 0 24px rgba(99,102,241,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(99,102,241,0.5);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: #fff;
  background: rgba(139,92,246,0.08);
}

.hero-stats {
  display: flex; gap: 40px; justify-content: center; flex-wrap: wrap;
  margin-top: 60px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.stat { text-align: center; }
.stat-value { display: block; font-size: 1.5rem; font-weight: 800; color: #fff; }
.stat-label { font-size: 0.78rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }

.hero-glow {
  position: absolute;
  top: 30%; left: 50%;
  width: 600px; height: 600px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(99,102,241,0.15), transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: breathe 6s ease-in-out infinite;
}

/* ── Sections ───────────────────────────────────────────────────────── */
section {
  position: relative;
  z-index: 1;
  padding: 100px 0;
}

.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
  display: inline-block;
  font-size: 0.78rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--cyan);
  margin-bottom: 12px;
}
.section-header h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; margin-bottom: 12px; }
.section-header p { color: var(--text-muted); font-size: 1.05rem; max-width: 560px; margin: 0 auto; }

/* ── Features ───────────────────────────────────────────────────────── */
#features { background: var(--bg-surface); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, transparent, rgba(99,102,241,0.3), transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition);
}
.feature-card:hover::before { opacity: 1; }
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.3);
  border-color: rgba(99,102,241,0.25);
}

.feature-icon {
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 14px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(139,92,246,0.15));
  color: var(--cyan);
}
.feature-icon svg { width: 26px; height: 26px; }

.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.feature-card p { color: var(--text-muted); font-size: 0.92rem; line-height: 1.65; }

/* ── How It Works ───────────────────────────────────────────────────── */
.steps { max-width: 640px; margin: 0 auto 60px; }

.step {
  display: flex; gap: 24px; align-items: flex-start;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition);
}
.step:hover { border-color: rgba(99,102,241,0.35); }

.step-number {
  flex-shrink: 0;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  font-size: 1.1rem; font-weight: 800;
  color: #fff;
}

.step-content h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
.step-content p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }

.step-detail {
  margin-top: 12px;
  padding: 8px 14px;
  border-radius: 8px;
  background: rgba(0,0,0,0.3);
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--cyan);
  overflow-x: auto;
  max-width: 100%;
  word-break: break-all;
}

.step-connector {
  display: flex; align-items: center; justify-content: center;
  padding: 4px 0 4px 48px;
}
.connector-line {
  width: 2px; height: 32px;
  background: linear-gradient(to bottom, var(--primary), var(--accent));
  border-radius: 1px;
  opacity: 0.5;
}

/* Flow diagram */
.flow-diagram {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  flex-wrap: wrap;
  padding: 36px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-width: 800px;
  margin: 0 auto;
}
.flow-node {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 16px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.3);
  font-size: 0.85rem; font-weight: 600;
  transition: all var(--transition);
  min-width: 110px;
}
.flow-node:hover { border-color: var(--accent); transform: scale(1.06); }
.flow-icon { font-size: 1.5rem; }
.fn-data { border-color: rgba(59,130,246,0.3); }
.fn-encrypt { border-color: rgba(139,92,246,0.3); }
.fn-chain { border-color: rgba(236,72,153,0.3); }
.fn-mongo { border-color: rgba(34,211,238,0.3); }

.flow-arrow { font-size: 1.4rem; color: var(--text-muted); animation: arrow-pulse 2s ease-in-out infinite; }
.flow-branch { transform: translateY(8px); }

/* ── SDK Tabs ───────────────────────────────────────────────────────── */
#sdks { background: var(--bg-surface); }

.sdk-tabs { max-width: 800px; margin: 0 auto; overflow: hidden; }

.tab-buttons {
  display: flex; gap: 4px; flex-wrap: wrap;
  padding: 6px;
  background: rgba(0,0,0,0.3);
  border-radius: 14px;
  margin-bottom: 24px;
  border: 1px solid var(--border);
}
.tab-btn {
  flex: 1; min-width: 80px;
  padding: 10px 16px;
  border: none; background: none;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.88rem; font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: all var(--transition);
}
.tab-btn:hover { color: #fff; background: rgba(255,255,255,0.05); }
.tab-btn.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(59,130,246,0.3), rgba(139,92,246,0.3));
  box-shadow: 0 0 20px rgba(99,102,241,0.2);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn 0.4s ease; }

.code-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 20px;
  background: #1a1a2e;
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  font-size: 0.78rem;
  position: relative;
}

.code-window-dots {
  display: flex; gap: 6px; align-items: center; margin-right: 14px;
}
.code-window-dots span {
  width: 12px; height: 12px; border-radius: 50%;
  display: inline-block;
}
.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }

.code-header-left {
  display: flex; align-items: center;
}

.code-lang { color: var(--cyan); font-weight: 600; }
.code-file { color: var(--text-muted); font-family: var(--mono); font-size: 0.75rem; }

.code-copy-btn {
  display: flex; align-items: center; gap: 5px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.72rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.code-copy-btn:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border-color: rgba(255,255,255,0.2);
}
.code-copy-btn.copied {
  background: rgba(34,211,238,0.15);
  color: var(--cyan);
  border-color: rgba(34,211,238,0.3);
}
.code-copy-btn svg {
  width: 14px; height: 14px;
}

.tab-panel pre {
  margin: 0;
  border-radius: 0 0 var(--radius) var(--radius) !important;
  border: 1px solid var(--border) !important;
  border-top: none !important;
  overflow-x: auto;
  max-width: 100%;
  background: #1a1b26 !important;
  position: relative;
}
.tab-panel pre code {
  font-size: 0.85rem !important;
  line-height: 1.7 !important;
  display: block;
  padding: 20px 20px 20px 54px !important;
  font-family: var(--mono) !important;
  text-shadow: none !important;
}

/* Line numbers */
.tab-panel pre.line-numbers {
  padding-left: 54px !important;
}
.tab-panel pre .line-numbers-rows {
  border-right: 1px solid rgba(255,255,255,0.08) !important;
  top: 20px !important;
  left: 0 !important;
  width: 40px !important;
}
.tab-panel pre .line-numbers-rows > span::before {
  color: rgba(255,255,255,0.2) !important;
  padding-right: 10px !important;
}

.code-line-numbers {
  position: absolute;
  top: 0; left: 0;
  padding: 20px 0;
  width: 40px;
  text-align: right;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.18);
  user-select: none;
  pointer-events: none;
  border-right: 1px solid rgba(255,255,255,0.06);
}

/* ── Vibrant Syntax Colors (One Dark inspired) ──────────────────────── */
.tab-panel code .token.comment,
.tab-panel code .token.prolog,
.tab-panel code .token.doctype,
.tab-panel code .token.cdata       { color: #6a737d !important; font-style: italic; }

.tab-panel code .token.keyword,
.tab-panel code .token.tag          { color: #c678dd !important; }

.tab-panel code .token.string,
.tab-panel code .token.attr-value   { color: #98c379 !important; }

.tab-panel code .token.number,
.tab-panel code .token.boolean      { color: #d19a66 !important; }

.tab-panel code .token.function     { color: #61afef !important; }

.tab-panel code .token.class-name,
.tab-panel code .token.builtin      { color: #e5c07b !important; }

.tab-panel code .token.operator,
.tab-panel code .token.punctuation  { color: #abb2bf !important; }

.tab-panel code .token.variable,
.tab-panel code .token.property     { color: #e06c75 !important; }

.tab-panel code .token.namespace    { color: #e5c07b !important; opacity: 1 !important; }

.tab-panel code .token.parameter    { color: #e06c75 !important; font-style: italic; }

.tab-panel code .token.return-type,
.tab-panel code .token.type-list    { color: #e5c07b !important; }

.tab-panel code .token.generic-method .token.function { color: #61afef !important; }

.tab-panel pre code,
.tab-panel code                       { color: #abb2bf !important; }

/* ── Install Grid ───────────────────────────────────────────────────── */
.install-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: 20px;
}

.install-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color var(--transition);
}
.install-card:hover { border-color: rgba(99,102,241,0.3); }

.install-lang {
  font-size: 0.85rem; font-weight: 700; color: var(--cyan);
  margin-bottom: 12px;
  text-transform: uppercase; letter-spacing: 0.05em;
}

.install-card pre {
  margin: 0 0 12px;
  border-radius: 8px !important;
  font-size: 0.82rem !important;
  overflow-x: auto;
  max-width: 100%;
  position: relative;
  background: #0d1117 !important;
}

.install-card pre code {
  white-space: pre;
  word-break: normal;
  overflow-wrap: normal;
  padding-right: 40px !important;
}

.install-copy-btn {
  position: absolute;
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  padding: 4px 6px !important;
  border-radius: 4px;
  opacity: 0;
  transition: opacity var(--transition), background var(--transition);
}
.install-card pre:hover .install-copy-btn {
  opacity: 1;
}

.install-card {
  overflow: hidden;
  min-width: 0;
}

.install-link {
  font-size: 0.82rem; font-weight: 600;
  color: var(--accent);
}
.install-link:hover { color: var(--pink); }

/* ── API Table ──────────────────────────────────────────────────────── */
.api-table-wrap { overflow-x: auto; }

.api-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.api-table th, .api-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.api-table th { color: var(--text-muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; background: rgba(0,0,0,0.2); }
.api-table td code { color: var(--cyan); font-size: 0.85rem; }
.api-table tr:last-child td { border-bottom: none; }
.api-table tr:hover { background: rgba(99,102,241,0.05); }
.api-mongo td { opacity: 0.85; }
.api-table .yes { color: var(--accent); font-weight: 600; }

/* ── Footer ─────────────────────────────────────────────────────────── */
footer {
  position: relative; z-index: 1;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 60px 0 32px;
}

.footer-inner { display: flex; gap: 60px; flex-wrap: wrap; margin-bottom: 40px; }
.footer-brand { flex: 1; min-width: 240px; font-size: 1.25rem; font-weight: 700; }
.footer-desc { font-size: 0.85rem; color: var(--text-muted); margin-top: 8px; font-weight: 400; }
.footer-links { display: flex; gap: 60px; flex-wrap: wrap; }
.footer-col { display: flex; flex-direction: column; gap: 8px; }
.footer-col h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin-bottom: 4px; }
.footer-col a { color: var(--text); font-size: 0.88rem; transition: color var(--transition); }
.footer-col a:hover { color: var(--cyan); }
.footer-meta { font-size: 0.8rem; color: var(--text-muted); }

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem; color: var(--text-muted);
}

/* ── Animations ─────────────────────────────────────────────────────── */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 10px rgba(99,102,241,0.1); }
  50%      { box-shadow: 0 0 25px rgba(99,102,241,0.25); }
}

@keyframes breathe {
  0%, 100% { opacity: 0.7; transform: translate(-50%, -50%) scale(1); }
  50%      { opacity: 1;   transform: translate(-50%, -50%) scale(1.15); }
}

@keyframes arrow-pulse {
  0%, 100% { opacity: 0.5; transform: translateX(0); }
  50%      { opacity: 1;   transform: translateX(4px); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

/* ── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 64px; left: 0; right: 0;
    background: rgba(6,6,14,0.96);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
  }
  .hero-stats { gap: 24px; }
  .features-grid { grid-template-columns: 1fr; }
  .install-grid { grid-template-columns: 1fr; }
  .flow-diagram { gap: 8px; }
  .flow-node { min-width: 80px; padding: 10px 12px; font-size: 0.75rem; }
  .footer-inner { flex-direction: column; gap: 32px; }
  .footer-links { gap: 32px; }
  .tab-buttons { gap: 2px; }
  .tab-btn { padding: 8px 10px; font-size: 0.78rem; min-width: 60px; }
  .install-card pre code { font-size: 0.75rem !important; }
  .container { padding: 0 16px; }
  .api-table th, .api-table td { padding: 10px 12px; font-size: 0.82rem; }
}

@media (max-width: 480px) {
  .step { flex-direction: column; gap: 12px; }
  .step-connector { padding-left: 0; }
  .install-card pre code { font-size: 0.7rem !important; }
  .hero-stats { gap: 16px; }
  .stat-value { font-size: 1.2rem; }
  .tab-btn { min-width: 50px; padding: 6px 8px; font-size: 0.72rem; }
}