/* ═══════════════════════════════════════════════════════════════════════════
   VECTA｜美股成长组合 — Design System
   Premium dark-mode glassmorphism theme
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── CSS Custom Properties ─────────────────────────────────────────────── */
:root {
  /* Background */
  --bg-primary: #0a0f1a;
  --bg-secondary: #111827;
  --bg-tertiary: #1a2235;

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.035);
  --glass-border: rgba(255, 255, 255, 0.07);
  --glass-hover: rgba(255, 255, 255, 0.06);

  /* Text */
  --text-primary: #e5e7eb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  /* Accent */
  --accent-green: #4ade80;
  --accent-green-dim: rgba(74, 222, 128, 0.15);
  --accent-red: #f87171;
  --accent-red-dim: rgba(248, 113, 113, 0.15);
  --accent-blue: #60a5fa;
  --accent-blue-dim: rgba(96, 165, 250, 0.12);
  --accent-orange: #fb923c;
  --accent-orange-dim: rgba(251, 146, 60, 0.12);
  --accent-purple: #a78bfa;

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --section-gap: 4rem;
  --card-radius: 16px;
  --card-padding: 28px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 15px;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Subtle background gradient */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(96, 165, 250, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(74, 222, 128, 0.04), transparent),
    linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  pointer-events: none;
  z-index: -1;
}

a { color: var(--accent-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Container ─────────────────────────────────────────────────────────── */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Section ───────────────────────────────────────────────────────────── */
.section {
  margin-bottom: var(--section-gap);
}

.section-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-title .icon {
  font-size: 1.3rem;
}

/* ── Glassmorphism Card ────────────────────────────────────────────────── */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  padding: var(--card-padding);
  transition: all 0.35s var(--ease-out);
}

.glass-card:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

/* ── Hero Section ──────────────────────────────────────────────────────── */
.hero {
  padding: 3.5rem 0 2rem;
  text-align: center;
}

.hero-brand {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.hero-description {
  font-size: 0.88rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 1.5rem;
  line-height: 1.6;
}

.hero-updated {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 2rem;
}

/* ── Warning Badge ─────────────────────────────────────────────────────── */
.warning-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--accent-orange-dim);
  color: var(--accent-orange);
  border: 1px solid rgba(251, 146, 60, 0.2);
  margin-bottom: 2rem;
}

/* ── KPI Grid ──────────────────────────────────────────────────────────── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 1.5rem;
}

.kpi-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 20px 16px;
  text-align: center;
  transition: all 0.3s var(--ease-out);
}

.kpi-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
  border-color: rgba(255, 255, 255, 0.12);
}

.kpi-value {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 4px;
}

.kpi-value.positive { color: var(--accent-green); }
.kpi-value.negative { color: var(--accent-red); }
.kpi-value.neutral  { color: var(--accent-blue); }

.kpi-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

/* Secondary KPI row */
.kpi-secondary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.kpi-secondary .kpi-mini {
  text-align: center;
  padding: 12px 8px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.kpi-mini .mini-value {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
}

.kpi-mini .mini-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Chart Section ─────────────────────────────────────────────────────── */
.chart-container {
  position: relative;
  width: 100%;
  height: 380px;
  margin-bottom: 1rem;
}

.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
}

.chart-legend {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 1rem;
  font-size: 0.82rem;
}

.chart-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
}

.chart-legend-dot {
  width: 10px;
  height: 3px;
  border-radius: 2px;
}

.chart-legend-dot.vecta { background: var(--accent-blue); }
.chart-legend-dot.sp500 { background: #6b7280; }

.chart-risk-note {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 8px 16px;
  background: var(--accent-red-dim);
  border-radius: 8px;
  border: 1px solid rgba(248, 113, 113, 0.1);
}

/* ── Portfolio Grid ────────────────────────────────────────────────────── */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.position-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 18px 20px;
  transition: all 0.3s var(--ease-out);
}

.position-card:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.position-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 10px;
}

.position-ticker {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.position-name {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 1px;
}

.position-pnl {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 3px 10px;
  border-radius: 6px;
}

.position-pnl.positive {
  color: var(--accent-green);
  background: var(--accent-green-dim);
}

.position-pnl.negative {
  color: var(--accent-red);
  background: var(--accent-red-dim);
}

.position-meta {
  display: flex;
  gap: 16px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.position-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.position-theme {
  display: inline-block;
  font-size: 0.68rem;
  color: var(--accent-blue);
  background: var(--accent-blue-dim);
  padding: 2px 8px;
  border-radius: 4px;
  margin-top: 8px;
  font-weight: 500;
}

/* ── Adjustments Timeline ──────────────────────────────────────────────── */
.adjustments-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.adjustment-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  font-size: 0.85rem;
  transition: background 0.2s;
}

.adjustment-item:hover {
  background: var(--glass-hover);
}

.adj-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 90px;
}

.adj-ticker {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-primary);
  min-width: 50px;
}

.adj-action {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 4px;
  white-space: nowrap;
}

.adj-action.buy {
  color: var(--accent-green);
  background: var(--accent-green-dim);
}

.adj-action.sell {
  color: var(--accent-red);
  background: var(--accent-red-dim);
}

.adj-action.pyramid {
  color: var(--accent-blue);
  background: var(--accent-blue-dim);
}

.adj-reason {
  font-size: 0.78rem;
  color: var(--text-secondary);
  flex: 1;
}

/* ── Guide Section ─────────────────────────────────────────────────────── */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.guide-step {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 24px 20px;
  text-align: center;
  transition: all 0.3s var(--ease-out);
}

.guide-step:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.1);
}

.guide-step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-blue-dim);
  color: var(--accent-blue);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.guide-step-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.guide-step-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── AI Commentary ─────────────────────────────────────────────────────── */
.ai-commentary-box {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-left: 3px solid var(--accent-purple);
  border-radius: 0 var(--card-radius) var(--card-radius) 0;
  padding: 24px 28px;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--text-secondary);
  font-style: italic;
}

.ai-commentary-date {
  margin-top: 12px;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-style: normal;
  font-family: var(--font-mono);
}

/* ── Disclaimer ────────────────────────────────────────────────────────── */
.disclaimer-box {
  background: rgba(248, 113, 113, 0.06);
  border: 1px solid rgba(248, 113, 113, 0.15);
  border-radius: var(--card-radius);
  padding: 24px 28px;
}

.disclaimer-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-red);
  margin-bottom: 12px;
}

.disclaimer-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ── Footer ────────────────────────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--glass-border);
}

.footer-brand {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.footer-note {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ── Loading State ─────────────────────────────────────────────────────── */
.loading-state {
  text-align: center;
  padding: 4rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.loading-spinner {
  display: inline-block;
  width: 28px;
  height: 28px;
  border: 3px solid var(--glass-border);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 12px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.error-state {
  text-align: center;
  padding: 4rem 0;
  color: var(--accent-red);
  font-size: 0.9rem;
}

/* ── Scroll Animations ─────────────────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.fade-in.visible .kpi-card:nth-child(1) { transition-delay: 0s; }
.fade-in.visible .kpi-card:nth-child(2) { transition-delay: 0.08s; }
.fade-in.visible .kpi-card:nth-child(3) { transition-delay: 0.16s; }
.fade-in.visible .kpi-card:nth-child(4) { transition-delay: 0.24s; }

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 680px) {
  body { font-size: 14px; }

  .container { padding: 0 16px; }

  .hero { padding: 2.5rem 0 1.5rem; }

  .hero-brand { font-size: 1.5rem; }

  .hero-tagline { font-size: 0.92rem; }

  .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .kpi-value { font-size: 1.4rem; }

  .kpi-secondary {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .chart-container { height: 280px; }

  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .adjustment-item {
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px 14px;
  }

  .adj-date { min-width: auto; }
  .adj-reason { width: 100%; flex-basis: 100%; }

  .guide-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .glass-card { padding: 20px 18px; }

  .section { margin-bottom: 2.5rem; }

  .section-title { font-size: 1.15rem; }
}

@media (max-width: 380px) {
  .kpi-value { font-size: 1.2rem; }
  .hero-brand { font-size: 1.3rem; }
}