/* ═══════════════════════════════════════════════════════════════════════════
   HTS Tariff Simulator - Styles
   F:\AI\TariffSim\styles.css
   ═══════════════════════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Design Tokens ────────────────────────────────────────────────────────── */
:root {
  --bg-deep:         #060c1a;
  --bg-dark:         #0a1228;
  --bg-card:         rgba(16, 26, 54, 0.85);
  --bg-card-hover:   rgba(22, 36, 72, 0.95);
  --bg-input:        rgba(10, 18, 40, 0.9);
  --bg-glass:        rgba(255,255,255,0.04);
  --border-color:    rgba(99, 140, 255, 0.18);
  --border-glow:     rgba(99, 140, 255, 0.45);

  --accent-cyan:     #00d4ff;
  --accent-blue:     #4f8fff;
  --accent-indigo:   #6366f1;
  --accent-purple:   #a855f7;
  --accent-green:    #10b981;
  --accent-orange:   #f59e0b;
  --accent-red:      #ef4444;
  --accent-yellow:   #fbbf24;

  --text-primary:    #e8edf8;
  --text-secondary:  #8899bb;
  --text-muted:      #4a5a80;

  --gradient-hero:   linear-gradient(135deg, #0a1228 0%, #0d1a3a 40%, #0a1825 100%);
  --gradient-accent: linear-gradient(135deg, #4f8fff, #00d4ff);
  --gradient-card:   linear-gradient(135deg, rgba(16,26,54,0.9), rgba(10,18,40,0.95));

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;

  --shadow-card:  0 8px 32px rgba(0,0,0,0.4), 0 1px 0 rgba(255,255,255,0.05) inset;
  --shadow-glow:  0 0 30px rgba(79,143,255,0.15);
  --shadow-input: 0 2px 16px rgba(0,0,0,0.3);
  --transition:   all 0.25s cubic-bezier(0.4,0,0.2,1);
}

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

html { scroll-behavior: smooth; font-size: 15px; }

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ── Animated background ──────────────────────────────────────────────────── */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: -1;
  background: var(--gradient-hero);
}
body::after {
  content: '';
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(ellipse 60% 40% at 20% 20%, rgba(79,143,255,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 80%, rgba(0,212,255,0.05) 0%, transparent 60%),
    radial-gradient(ellipse 40% 30% at 50% 100%, rgba(163,85,247,0.05) 0%, transparent 60%);
  animation: bgShift 20s ease-in-out infinite alternate;
}
@keyframes bgShift {
  0%   { opacity: 1; }
  100% { opacity: 0.6; }
}

/* ── Header / Hero ────────────────────────────────────────────────────────── */
.header {
  background: rgba(6, 12, 26, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 0 2rem;
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 4px 30px rgba(0,0,0,0.5);
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, #4f8fff, #00d4ff);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  box-shadow: 0 0 20px rgba(79,143,255,0.4);
}
.logo-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  background: linear-gradient(135deg, #ffffff, #00d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.logo-text p {
  font-size: 0.7rem;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}
.header-badge {
  display: flex; align-items: center; gap: 8px;
}
.badge {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border: 1px solid;
}
.badge-live { background: rgba(16,185,129,0.15); border-color: rgba(16,185,129,0.4); color: #10b981; }
.badge-cbp  { background: rgba(79,143,255,0.1);  border-color: rgba(79,143,255,0.3); color: #4f8fff; }

/* ── Hero Section ─────────────────────────────────────────────────────────── */
.hero {
  padding: 3.5rem 2rem 2rem;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}
.hero h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 0%, #b0ccff 50%, #00d4ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 1.5rem;
  line-height: 1.7;
}
.db-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 20px;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.3);
  font-size: 0.8rem;
  color: #10b981;
  font-weight: 500;
}
.db-status.hidden { display: none; }
#loading-spinner {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 2rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
}
.spinner {
  width: 36px; height: 36px;
  border: 3px solid rgba(79,143,255,0.2);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Main Layout ──────────────────────────────────────────────────────────── */
.main-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.5rem 2rem 4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
@media (max-width: 1024px) {
  .main-content { grid-template-columns: 1fr; }
}

/* ── Cards ────────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
  transition: var(--transition);
}
.card:hover { border-color: var(--border-glow); box-shadow: var(--shadow-card), var(--shadow-glow); }
.card-header {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 1.25rem;
}
.card-header h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}
.card-icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  background: var(--bg-glass);
}

/* ── Tabs ─────────────────────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 4px;
  background: rgba(0,0,0,0.3);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: 1.25rem;
}
.tab-btn {
  flex: 1;
  padding: 8px 12px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.tab-btn:hover { background: var(--bg-glass); color: var(--text-primary); }
.tab-btn.active {
  background: linear-gradient(135deg, rgba(79,143,255,0.25), rgba(0,212,255,0.15));
  color: var(--accent-cyan);
  border: 1px solid rgba(79,143,255,0.3);
}
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ── Inputs ───────────────────────────────────────────────────────────────── */
.search-input, .form-input, .form-select {
  width: 100%;
  padding: 11px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: 'Inter', sans-serif;
  outline: none;
  transition: var(--transition);
  box-shadow: var(--shadow-input);
}
.search-input:focus, .form-input:focus, .form-select:focus {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-input), 0 0 0 3px rgba(79,143,255,0.15);
}
.search-input::placeholder { color: var(--text-muted); }
.search-input:disabled, .form-input:disabled { opacity: 0.4; cursor: not-allowed; }
.form-select option { background: #0d1a3a; color: var(--text-primary); }

.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 5px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

/* ── Search Results ────────────────────────────────────────────────────────── */
#search-results {
  margin-top: 0.75rem;
  max-height: 380px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  scrollbar-width: thin;
  scrollbar-color: rgba(79,143,255,0.3) transparent;
}
.result-card {
  padding: 12px 14px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}
.result-card:hover {
  background: rgba(79,143,255,0.08);
  border-color: rgba(79,143,255,0.4);
  transform: translateX(3px);
}
.result-card.selected {
  background: rgba(79,143,255,0.12);
  border-color: var(--accent-blue);
  box-shadow: 0 0 12px rgba(79,143,255,0.2);
}
.result-hts {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: var(--accent-cyan);
  font-weight: 500;
  margin-bottom: 3px;
}
.result-desc {
  font-size: 0.84rem;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 5px;
}
.result-meta { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.rate-badge {
  font-size: 0.73rem;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 12px;
}
.rate-badge.has-rate { background: rgba(245,158,11,0.15); color: var(--accent-orange); border: 1px solid rgba(245,158,11,0.3); }
.rate-badge.free-rate { background: rgba(16,185,129,0.12); color: var(--accent-green);  border: 1px solid rgba(16,185,129,0.3); }
.uom-badge { font-size: 0.7rem; color: var(--text-muted); background: var(--bg-glass); padding: 2px 7px; border-radius: 8px; }
.no-results { text-align: center; color: var(--text-muted); font-size: 0.85rem; padding: 1.5rem; }

/* ── Detail Panel ─────────────────────────────────────────────────────────── */
#detail-panel.hidden, #calculation-panel.hidden, #results-panel.hidden { display: none; }

#detail-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
}
.detail-hts-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.4rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}
.detail-desc {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}
.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.detail-item {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}
.detail-item label { font-size: 0.7rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; display: block; margin-bottom: 3px; }
.detail-item span { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); }

.tariff-flags {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 1rem;
}
.tariff-flag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid;
  display: none;
}
.flag-232 { background: rgba(245,158,11,0.1); border-color: rgba(245,158,11,0.4); color: var(--accent-orange); }
.flag-301 { background: rgba(239,68,68,0.1);  border-color: rgba(239,68,68,0.4);  color: var(--accent-red); }

.cbp-btn-row { display: flex; gap: 8px; }
.cbp-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid;
}
.cbp-btn-primary {
  background: rgba(79,143,255,0.1);
  border-color: rgba(79,143,255,0.35);
  color: var(--accent-blue);
}
.cbp-btn-primary:hover { background: rgba(79,143,255,0.2); }

/* ── Calculation Panel ───────────────────────────────────────────────────── */
.calc-section-title {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  margin-top: 1.25rem;
}
.calc-section-title:first-child { margin-top: 0; }

.calc-btn {
  width: 100%;
  padding: 13px;
  margin-top: 1.25rem;
  background: linear-gradient(135deg, #4f8fff, #00d4ff);
  border: none;
  border-radius: var(--radius-md);
  color: #000;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.02em;
  box-shadow: 0 4px 20px rgba(79,143,255,0.35);
}
.calc-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(79,143,255,0.45);
}
.calc-btn:active { transform: translateY(0); }

.browse-btn {
  display: none;
  align-items: center; gap: 6px;
  padding: 8px 16px;
  background: rgba(163,85,247,0.1);
  border: 1px solid rgba(163,85,247,0.35);
  border-radius: var(--radius-sm);
  color: var(--accent-purple);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 0.5rem;
}
.browse-btn:hover { background: rgba(163,85,247,0.2); }

/* ── Results Panel ────────────────────────────────────────────────────────── */
#results-panel {
  grid-column: 1 / -1;
  background: var(--bg-card);
  border: 1px solid rgba(79,143,255,0.3);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-card), 0 0 40px rgba(79,143,255,0.08);
  backdrop-filter: blur(16px);
}
.results-header { margin-bottom: 1.25rem; }
.results-header h3 {
  font-size: 1.1rem; font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.4rem;
}
.entry-summary {
  display: flex; gap: 16px; flex-wrap: wrap;
  font-size: 0.8rem; color: var(--text-secondary);
}
.entry-summary strong { color: var(--text-primary); }

.shipment-banner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}
.ship-val label { font-size: 0.72rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; display: block; margin-bottom: 4px; }
.ship-val span  { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); display: block; }
.total-duty span { color: var(--accent-cyan); font-size: 1.3rem; }
.eff-rate span  { color: var(--accent-purple); }

.duty-breakdown { display: flex; flex-direction: column; gap: 10px; margin-bottom: 1.25rem; }
.duty-line {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 12px 14px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.duty-line:hover { background: rgba(255,255,255,0.04); }
.duty-line-left { display: flex; gap: 10px; align-items: flex-start; flex: 1; }
.duty-icon { font-size: 1.1rem; margin-top: 2px; flex-shrink: 0; }
.duty-label { font-size: 0.88rem; font-weight: 600; color: var(--text-primary); margin-bottom: 2px; }
.duty-hts9903 { font-size: 0.73rem; color: var(--text-muted); }
.duty-hts9903 code { font-family: 'JetBrains Mono', monospace; color: var(--text-secondary); }
.duty-note { font-size: 0.75rem; color: var(--text-secondary); margin-top: 3px; line-height: 1.4; }
.duty-line-right { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; flex-shrink: 0; }
.duty-rate { font-size: 0.9rem; font-weight: 700; }
.duty-amount { font-size: 1rem; font-weight: 700; color: var(--text-primary); font-family: 'JetBrains Mono', monospace; }
.uncertain-badge {
  font-size: 0.68rem;
  background: rgba(245,158,11,0.12);
  border: 1px solid rgba(245,158,11,0.3);
  color: var(--accent-yellow);
  padding: 2px 7px;
  border-radius: 8px;
}
.total-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  background: linear-gradient(135deg, rgba(79,143,255,0.08), rgba(0,212,255,0.06));
  border: 1px solid rgba(79,143,255,0.3);
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  font-weight: 600;
  font-size: 1rem;
}
.total-amount {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: 'JetBrains Mono', monospace;
}

/* ── Disclaimer ───────────────────────────────────────────────────────────── */
.disclaimer-box {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(245,158,11,0.07);
  border: 1px solid rgba(245,158,11,0.25);
  border-radius: var(--radius-md);
}
.disclaimer-icon { font-size: 1.3rem; flex-shrink: 0; margin-top: 2px; }
.disclaimer-text strong { font-size: 0.88rem; color: var(--accent-yellow); display: block; margin-bottom: 4px; }
.disclaimer-text p { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.5; margin-bottom: 8px; }
.disclaimer-links { display: flex; gap: 8px; flex-wrap: wrap; }
.cbp-verify-btn {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 6px;
  background: rgba(79,143,255,0.1);
  border: 1px solid rgba(79,143,255,0.3);
  color: var(--accent-blue);
  text-decoration: none;
  transition: var(--transition);
}
.cbp-verify-btn:hover { background: rgba(79,143,255,0.2); }

/* ── Status Message ───────────────────────────────────────────────────────── */
.status-msg {
  display: none;
  text-align: center;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
  margin: 0.5rem auto;
  max-width: 600px;
}
.status-success { background: rgba(16,185,129,0.1); color: var(--accent-green);  border: 1px solid rgba(16,185,129,0.3); }
.status-error   { background: rgba(239,68,68,0.1);  color: var(--accent-red);    border: 1px solid rgba(239,68,68,0.3); display: block !important; }
.status-warning { background: rgba(245,158,11,0.1); color: var(--accent-yellow); border: 1px solid rgba(245,158,11,0.3); display: block !important; }
.status-info    { background: rgba(79,143,255,0.1); color: var(--accent-blue);   border: 1px solid rgba(79,143,255,0.2); }

/* ── Footer ───────────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 1.25rem 2rem;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: rgba(6,12,26,0.9);
}
.footer a { color: var(--accent-blue); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* ── Scrollbar ────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(79,143,255,0.3); border-radius: 3px; }