/* ─────────────────────────────────────────────
   PaperChase Design System v3 — Stripe White+Purple
   Inspired by Stripe's clean fintech aesthetic
   ───────────────────────────────────────────── */

/* ── CSS Custom Properties ────────────────── */
:root {
  /* Backgrounds */
  --pc-bg: #ffffff;
  --pc-surface: #ffffff;
  --pc-surface-2: #f8fafc;
  --pc-surface-3: #f1f5f9;
  --pc-surface-hover: #f0f4f8;

  /* Brand — Purple */
  --pc-purple: #533afd;
  --pc-purple-hover: #4434d4;
  --pc-purple-light: #b9b9f9;
  --pc-purple-soft: #d6d9fc;
  --pc-purple-bg: rgba(83, 58, 253, 0.06);

  /* Text */
  --pc-heading: #061b31;
  --pc-text: #273951;
  --pc-text-2: #64748b;
  --pc-text-3: #94a3b8;
  --pc-text-inverse: #ffffff;

  /* Status */
  --pc-green: #15be53;
  --pc-green-bg: rgba(21, 190, 83, 0.1);
  --pc-red: #ef4444;
  --pc-red-bg: rgba(239, 68, 68, 0.1);
  --pc-yellow: #f59e0b;
  --pc-yellow-bg: rgba(245, 158, 11, 0.1);
  --pc-blue: #3b82f6;
  --pc-blue-bg: rgba(59, 130, 246, 0.1);

  /* Borders */
  --pc-border: #e2e8f0;
  --pc-border-2: #cbd5e1;
  --pc-border-focus: #533afd;

  /* Shadows */
  --pc-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --pc-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --pc-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --pc-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --pc-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --pc-shadow-purple: 0 13px 27px -5px rgba(50, 50, 93, 0.2), 0 8px 16px -8px rgba(0, 0, 0, 0.08);

  /* Typography */
  --pc-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --pc-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --pc-font-features: 'cv01', 'ss03';

  /* Radii */
  --pc-radius-sm: 4px;
  --pc-radius: 6px;
  --pc-radius-lg: 8px;

  /* Layout */
  --pc-max-width: 1200px;
  --pc-topbar-height: 56px;
}

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

html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  background: var(--pc-bg);
  color: var(--pc-text);
  font-family: var(--pc-font);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Topbar / Navigation ─────────────────── */
.topbar {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--pc-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.topbar-inner {
  max-width: var(--pc-max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: var(--pc-topbar-height);
}
.logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--pc-heading);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-right: 24px;
  letter-spacing: -0.3px;
}
.logo .logo-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--pc-purple);
  border-radius: 50%;
}
.topbar-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--pc-text-2);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: var(--pc-radius);
  transition: all 0.15s;
  white-space: nowrap;
}
.nav-link:hover { background: var(--pc-surface-hover); color: var(--pc-heading); }
.nav-link.active {
  background: var(--pc-purple-bg);
  color: var(--pc-purple);
  font-weight: 600;
}
.topbar-spacer { flex: 1; }
.topbar-auth { display: flex; align-items: center; gap: 6px; margin-left: 12px; }
.btn-login {
  font-size: 13px;
  font-weight: 500;
  color: var(--pc-text-2);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: var(--pc-radius);
  transition: all 0.15s;
}
.btn-login:hover { background: var(--pc-surface-hover); color: var(--pc-heading); }
.btn-register {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  background: var(--pc-purple);
  text-decoration: none;
  padding: 7px 16px;
  border-radius: var(--pc-radius);
  transition: all 0.15s;
}
.btn-register:hover { background: var(--pc-purple-hover); }

/* ── Container ───────────────────────────── */
.wrap { position: relative; z-index: 1; }
.container {
  max-width: var(--pc-max-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ── Page Header ─────────────────────────── */
.page-header {
  padding: 32px 0 0;
  margin-bottom: 24px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.page-title-wrap { display: flex; flex-direction: column; gap: 6px; }
.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--pc-heading);
  letter-spacing: -0.5px;
  line-height: 1.2;
}
.page-sub {
  font-size: 13px;
  color: var(--pc-text-2);
  display: flex;
  align-items: center;
  gap: 6px;
}
.live {
  display: inline-block;
  width: 7px;
  height: 7px;
  background: var(--pc-green);
  border-radius: 50%;
  animation: blink 2s infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:.3} }

.countdown-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  margin-left: auto;
  flex-shrink: 0;
}
.countdown-lbl {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--pc-text-3);
}
.countdown-num {
  font-size: 16px;
  font-weight: 700;
  font-family: var(--pc-mono);
  color: var(--pc-heading);
  white-space: nowrap;
}

/* ── Buttons ─────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--pc-font);
  font-size: 13px;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: var(--pc-radius);
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  line-height: 1;
}
.btn-primary {
  background: var(--pc-purple);
  color: #fff;
}
.btn-primary:hover { background: var(--pc-purple-hover); }
.btn-secondary {
  background: transparent;
  color: var(--pc-purple);
  border: 1px solid var(--pc-purple-light);
}
.btn-secondary:hover { background: var(--pc-purple-bg); }
.btn-ghost {
  background: transparent;
  color: var(--pc-text-2);
  border: 1px solid var(--pc-border);
}
.btn-ghost:hover { background: var(--pc-surface-hover); color: var(--pc-heading); }
.btn-sm { font-size: 11px; padding: 4px 10px; }
.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--pc-radius);
  background: transparent;
  border: 1px solid var(--pc-border);
  color: var(--pc-text-2);
  cursor: pointer;
  transition: all 0.15s;
}
.btn-icon:hover { background: var(--pc-surface-hover); color: var(--pc-heading); }

/* ── Cards ───────────────────────────────── */
.card {
  background: var(--pc-surface);
  border: 1px solid var(--pc-border);
  border-radius: var(--pc-radius-lg);
  padding: 20px;
  transition: box-shadow 0.2s;
}
.card-hover:hover {
  box-shadow: var(--pc-shadow-purple);
  border-color: var(--pc-purple-light);
}
.card-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--pc-text-3);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--pc-border);
}

/* ── Grids ───────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 16px; }

/* ── Tables ──────────────────────────────── */
.table-wrap {
  border: 1px solid var(--pc-border);
  border-radius: var(--pc-radius-lg);
  overflow: hidden;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
thead th {
  background: var(--pc-surface-2);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--pc-text-3);
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--pc-border);
}
tbody td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--pc-border);
  color: var(--pc-text);
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--pc-surface-hover); }

/* ── Stats / KPI ─────────────────────────── */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--pc-border);
  border-radius: var(--pc-radius-lg);
  overflow: hidden;
  margin-bottom: 20px;
}
.stat-item {
  background: var(--pc-surface);
  padding: 14px 18px;
  text-align: center;
}
.stat-lbl {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--pc-text-3);
  margin-bottom: 4px;
}
.stat-val {
  font-size: 20px;
  font-weight: 700;
  font-family: var(--pc-mono);
  color: var(--pc-heading);
}

/* ── Badges ──────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 3px;
  gap: 4px;
}
.badge-green { background: var(--pc-green-bg); color: var(--pc-green); }
.badge-red { background: var(--pc-red-bg); color: var(--pc-red); }
.badge-yellow { background: var(--pc-yellow-bg); color: var(--pc-yellow); }
.badge-blue { background: var(--pc-blue-bg); color: var(--pc-blue); }
.badge-purple { background: var(--pc-purple-bg); color: var(--pc-purple); }

/* ── Tabs ────────────────────────────────── */
.tabs-wrap {
  border-bottom: 1px solid var(--pc-border);
  margin-bottom: 24px;
  display: flex;
  gap: 0;
}
.tab {
  padding: 10px 20px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--pc-text-2);
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  text-decoration: none;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: var(--pc-font);
}
.tab:hover { color: var(--pc-heading); }
.tab.active { color: var(--pc-purple); border-bottom-color: var(--pc-purple); }

/* ── Section toggle ──────────────────────── */
.section { display: none; }
.section.active { display: block; }

/* ── Filters ─────────────────────────────── */
.filter-bar {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  align-items: center;
}
.filter-btn {
  font-size: 11px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid var(--pc-border);
  background: var(--pc-surface);
  color: var(--pc-text-2);
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--pc-font);
}
.filter-btn:hover { background: var(--pc-surface-hover); }
.filter-btn.active { background: var(--pc-purple); color: #fff; border-color: var(--pc-purple); }
.filter-count { font-size: 11px; color: var(--pc-text-3); margin-left: auto; }

/* ── Loading ─────────────────────────────── */
.loading {
  padding: 60px 20px;
  text-align: center;
  color: var(--pc-text-2);
  font-size: 13px;
}
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--pc-border);
  border-top-color: var(--pc-purple);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 10px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Price / Number Helpers ──────────────── */
.mono { font-family: var(--pc-mono); }
.text-green { color: var(--pc-green); }
.text-red { color: var(--pc-red); }
.text-yellow { color: var(--pc-yellow); }
.text-purple { color: var(--pc-purple); }
.text-muted { color: var(--pc-text-2); }
.text-muted-2 { color: var(--pc-text-3); }
.text-heading { color: var(--pc-heading); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.text-xs { font-size: 11px; }
.text-sm { font-size: 13px; }
.text-lg { font-size: 16px; }
.text-xl { font-size: 20px; }
.text-2xl { font-size: 24px; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ── Flex / Spacing ──────────────────────── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mr-2 { margin-right: 8px; }
.ml-auto { margin-left: auto; }
.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

/* ── Price row ───────────────────────────── */
.price-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 0;
  border-bottom: 1px solid var(--pc-border);
}
.price-row:last-child { border-bottom: none; }
.price-sym { font-weight: 600; font-size: 13px; color: var(--pc-heading); font-family: var(--pc-mono); }
.price-val { font-size: 13px; color: var(--pc-text); font-family: var(--pc-mono); }

/* ── Progress bar ────────────────────────── */
.progress-track { height: 4px; background: var(--pc-surface-3); border-radius: 2px; overflow: hidden; }
.progress-fill { height: 100%; border-radius: 2px; transition: width 0.5s; }

/* ── AI Summary ──────────────────────────── */
.ai-summary {
  background: var(--pc-surface-3);
  border: 1px solid var(--pc-border);
  border-left: 3px solid var(--pc-purple);
  border-radius: var(--pc-radius);
  padding: 10px 14px;
  margin-bottom: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--pc-text-2);
}

/* ── Section title ───────────────────────── */
.section-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--pc-text-3);
  margin-bottom: 12px;
}
.divider {
  height: 1px;
  background: var(--pc-border);
  margin: 16px 0;
}

/* ── Disclaimer ──────────────────────────── */
.disclaimer {
  background: var(--pc-yellow-bg);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--pc-radius);
  padding: 10px 14px;
  margin: 16px 0 4px;
  font-size: 11px;
  color: var(--pc-text-2);
  line-height: 1.5;
}
.disclaimer strong { color: var(--pc-yellow); }

/* ── News item ───────────────────────────── */
.news-item {
  padding: 8px 0;
  border-bottom: 1px solid var(--pc-border);
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.news-item:last-child { border-bottom: none; }
.news-source {
  font-size: 10px;
  color: var(--pc-text-3);
  min-width: 70px;
  margin-top: 1px;
  text-transform: uppercase;
  font-weight: 600;
}
.news-title {
  font-size: 12px;
  line-height: 1.5;
  flex: 1;
  color: var(--pc-text-2);
  text-decoration: none;
}
.news-title:hover { color: var(--pc-purple); }

/* ── Source note ─────────────────────────── */
.source-note {
  font-size: 10px;
  color: var(--pc-text-3);
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--pc-border);
  line-height: 1.5;
}
.source-note strong { color: var(--pc-text-2); text-transform: uppercase; letter-spacing: 0.03em; }

/* ── Responsive ──────────────────────────── */
@media (max-width: 900px) {
  .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .topbar-inner { padding: 0 16px; gap: 2px; }
  .logo { font-size: 14px; margin-right: 12px; }
  .nav-link { font-size: 11px; padding: 4px 8px; }
  .page-header { flex-direction: column; align-items: flex-start; }
  .page-title { font-size: 22px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .container { padding: 0 16px 60px; }
  .page-title { font-size: 20px; }
  .stats-bar { grid-template-columns: 1fr 1fr; }
}