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

:root {
  --primary: #0284c7;
  --primary-light: #38bdf8;
  --primary-dark: #0369a1;
  --success: #059669;
  --danger: #dc2626;
  --warning: #d97706;
  --bg: #f0f4f8;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --text: #1e293b;
  --text-sec: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --shadow: 0 4px 24px rgba(2,132,199,.08);
  --radius: 16px;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-alt: #334155;
  --text: #e2e8f0;
  --text-sec: #94a3b8;
  --text-muted: #64748b;
  --border: #334155;
  --shadow: 0 4px 24px rgba(0,0,0,.3);
}

/* ---- RESET & BASE FOR LOOKUP AREA ---- */
.pn-app *, .pn-app *::before, .pn-app *::after {box-sizing: border-box;margin: 0;padding: 0;font-size: 15px;}

.pn-app {
  font-family: 'Inter', system-ui, sans-serif;
  /* background: var(--bg); */
  color: var(--text);
  transition: background 0.3s, color 0.3s;
  line-height: 1.6;
}

/* ---- SPINNER ANIMATION ---- */
@keyframes spin { to { transform: rotate(360deg); } }
.pn-spinner { animation: spin 0.8s linear infinite; }

/* ---- FADE IN ---- */
@keyframes pn-fadeIn {
  from { opacity: 0; transform: translateY(16px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.pn-fade-in { animation: pn-fadeIn 0.4s ease forwards; }

/* ---- COLLAPSIBLE ---- */
.pn-collapse {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.3s ease;
}
.pn-collapse.open {
  max-height: 3000px;
  opacity: 1;
}

/* =============================================
   LAYOUT
   ============================================= */
.pn-wrap { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.pn-wrap-sm { max-width: 720px; margin: 0 auto; padding: 0 20px; }
.pn-wrap-md { max-width: 900px; margin: 0 auto; padding: 0 20px; }

/* =============================================
   HEADER / NAV (Modified for Nukeviet integration)
   ============================================= */
.pn-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(255,255,255,0.88);
  border-bottom: 1px solid rgba(226,232,240,0.7);
  transition: background 0.3s, border-color 0.3s;
}
[data-theme="dark"] .pn-nav {
  background: rgba(15,23,42,0.88);
  border-color: rgba(51,65,85,0.7);
}
.pn-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.pn-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.pn-brand-icon {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  box-shadow: 0 2px 8px rgba(2,132,199,0.35);
  flex-shrink: 0;
}
.pn-brand-name {
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  color: var(--text);
}
.pn-brand-name span { color: var(--primary); }

.pn-theme-btn {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-sec);
  font-size: 0.95rem;
  transition: all 0.2s;
}
.pn-theme-btn:hover { border-color: var(--primary); color: var(--primary); }

/* =============================================
   HERO
   ============================================= */
.pn-hero {
  padding: 60px 20px 80px;
  /* background: radial-gradient(ellipse at top right, rgba(2,132,199,0.12) 0%, transparent 70%); */
}
[data-theme="dark"] .pn-hero {
  background: radial-gradient(ellipse at top right, rgba(2,132,199,0.07) 0%, transparent 70%);
}
.pn-hero-text {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 40px;
}
.pn-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 99px;
  background: rgba(2,132,199,0.1);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid rgba(2,132,199,0.2);
  margin-bottom: 20px;
}
.pn-hero-title {
  font-size: 30px;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  color: var(--text);
}
.pn-hero-title .gradient-text {
  background: linear-gradient(135deg, var(--primary), #2563eb);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.pn-hero-sub {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-sec);
  margin-bottom: 10px;
}
.pn-hero-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* =============================================
   LOOKUP CARD
   ============================================= */
.pn-card {
  background: var(--surface);
  border-radius: 22px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  max-width: 640px;
  margin: 0 auto;
}

/* Source tabs */
.pn-source-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--surface-alt);
}
.pn-source-tab {
  flex: 1;
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 19px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  position: relative;
  color: var(--text-muted);
  background: none;
  transition: all 0.2s;
}
.pn-source-tab.active {
  color: var(--primary);
  background: var(--surface);
}
.pn-tab-bar {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--primary);
  box-shadow: 0 -2px 8px rgba(2,132,199,0.45);
  display: none;
}
.pn-source-tab.active .pn-tab-bar { display: block; }

.pn-card-body { padding: 28px; }

/* Vehicle selector */
.pn-vehicle-label {
  font-size: 14px;
  font-weight: 600;
  display: block;
  margin-bottom: 12px;
  color: var(--text);
}
.pn-vehicle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 22px;
}
.pn-vehicle-card {
  cursor: pointer;
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  transition: all 0.2s;
  background: var(--bg);
  color: var(--text-sec);
  font-size: 0.875rem;
  font-weight: 600;
}
.pn-vehicle-card:hover {
  border-color: rgba(2,132,199,0.4);
  color: var(--text);
}
.pn-vehicle-card.active {
  border-color: var(--primary);
  background: rgba(2,132,199,0.05);
  color: var(--primary);
}
.pn-vehicle-card i { font-size: 1.6rem; }

/* Input group */
.pn-input-group { margin-bottom: 18px; }
.pn-input-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.pn-input-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}
.pn-input-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.pn-input-wrap { position: relative; }
.pn-plate-input {
  width: 100%;
  padding: 14px 48px 14px 20px;
  border-radius: 14px;
  border: 2px solid var(--border);
  font-size: 1.2rem;
  font-family: 'Consolas', 'Courier New', monospace;
  letter-spacing: 0.1em;
  background: var(--bg);
  color: var(--text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.pn-plate-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(2,132,199,0.1);
}
.pn-plate-input.error {
  border-color: var(--danger);
  box-shadow: 0 0 0 4px rgba(220,38,38,0.1);
}
.pn-input-icon {
  position: absolute;
  right: 16px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  font-size: 1.1rem;
}
.pn-error-msg {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 6px;
  font-weight: 500;
  display: none;
}

/* Search button */
.pn-btn-search {
  width: 100%;
  padding: 16px;
  border-radius: 14px;
  background: linear-gradient(135deg, #0284c7, #2563eb);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 16px rgba(2,132,199,0.3);
  transition: all 0.2s;
}
.pn-btn-search:hover:not(:disabled) {
  box-shadow: 0 8px 24px rgba(2,132,199,0.42);
  transform: translateY(-1px);
}
.pn-btn-search:active:not(:disabled) { transform: none; }
.pn-btn-search:disabled { opacity: 0.7; cursor: not-allowed; }

/* =============================================
   RESULTS
   ============================================= */
.pn-results { max-width: 640px; margin: 24px auto 0; display: none; }

.pn-result-loading {
  background: var(--surface);
  border-radius: 20px;
  border: 1px solid var(--border);
  padding: 48px;
  text-align: center;
  box-shadow: var(--shadow);
}
.pn-loading-ring {
  width: 48px; height: 48px;
  border-radius: 50%;
  border: 4px solid rgba(2,132,199,0.2);
  border-top-color: var(--primary);
  margin: 0 auto 16px;
  animation: spin 0.8s linear infinite;
}
.pn-loading-text {
  color: var(--text-muted);
  font-weight: 500;
}

/* None / Not found */
.pn-result-none {
  background: var(--surface);
  border-radius: 20px;
  border: 1px solid var(--border);
  padding: 40px;
  text-align: center;
  box-shadow: var(--shadow);
}
.pn-result-icon {
  width: 64px; height: 64px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.8rem;
}
.pn-icon-warning { background: rgba(217,119,6,0.1); color: var(--warning); }
.pn-icon-success { background: rgba(5,150,105,0.1); color: var(--success); }
.pn-icon-danger  { background: var(--danger); color: #fff; box-shadow: 0 4px 12px rgba(220,38,38,0.3); }

.pn-result-title { font-size: 1.2rem; font-weight: 800; margin-bottom: 10px; color: var(--text); }
.pn-result-title.danger { color: var(--danger); }
.pn-result-title.success { color: var(--success); }

.pn-plate-tag {
  font-family: monospace;
  padding: 2px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-alt);
  font-size: 1.05em;
}
.pn-tip-box {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 0.875rem;
  color: #1d4ed8;
  margin-top: 14px;
  text-align: left;
}
[data-theme="dark"] .pn-tip-box {
  background: rgba(30,58,138,0.2);
  border-color: rgba(59,130,246,0.3);
  color: #93c5fd;
}

/* Found violations card */
.pn-result-found {
  background: var(--surface);
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: 0 8px 32px rgba(220,38,38,0.08);
  overflow: hidden;
}
.pn-found-header {
  padding: 24px;
  background: linear-gradient(135deg, rgba(220,38,38,0.08), transparent);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.pn-found-desc { color: var(--text-muted); font-size: 0.9rem; margin-top: 6px; }

/* Sub tabs */
.pn-sub-tabs { display: flex; border-bottom: 1px solid var(--border); }
.pn-sub-tab {
  flex: 1;
  padding: 14px;
  font-size: 0.85rem;
  font-weight: 700;
  border: none;
  background: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  color: var(--text-muted);
}
.pn-sub-tab.unpaid { color: var(--danger); border-bottom-color: var(--danger); background: rgba(220,38,38,0.04); }
.pn-sub-tab.paid   { color: var(--success); border-bottom-color: var(--success); background: rgba(5,150,105,0.04); }

.pn-violations-list {
  padding: 20px;
  background: rgba(241,245,249,0.5);
}
[data-theme="dark"] .pn-violations-list { background: rgba(15,23,42,0.4); }

/* Violation card */
.pn-violation {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 14px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
  transition: box-shadow 0.2s;
}
.pn-violation:last-child { margin-bottom: 0; }
.pn-violation:hover { box-shadow: 0 4px 14px rgba(0,0,0,0.1); }

.pn-violation-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.pn-violation-id { font-weight: 600; color: var(--primary); font-size: 0.9rem; }
.pn-status-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 99px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.pn-status-badge.unpaid { background: rgba(220,38,38,0.1); color: var(--danger); border: 1px solid rgba(220,38,38,0.2); }
.pn-status-badge.paid   { background: rgba(5,150,105,0.1); color: var(--success); border: 1px solid rgba(5,150,105,0.2); }

.pn-violation-rows { display: flex; flex-direction: column; gap: 12px; }
.pn-violation-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.pn-violation-row i {
  color: var(--text-muted);
  width: 18px;
  margin-top: 2px;
  flex-shrink: 0;
}
.pn-violation-row-label { font-size: 0.8rem; color: var(--text-muted); }
.pn-violation-row-value { font-weight: 600; font-size: 0.9rem; color: var(--text); }
.pn-violation-row-value.danger { color: var(--danger); }

.pn-pay-btn {
  width: 100%;
  padding: 10px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  margin-top: 18px;
  transition: opacity 0.2s;
}
.pn-pay-btn:hover { opacity: 0.9; }

.pn-empty-tab { text-align: center; padding: 32px; color: var(--text-muted); }

/* =============================================
   STATS SECTION
   ============================================= */
.pn-stats {
  background: var(--surface-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 52px 20px;
}
.pn-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.pn-stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: box-shadow 0.2s;
}
.pn-stat-card:hover { box-shadow: 0 6px 20px rgba(0,0,0,0.1); }
.pn-stat-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: rgba(2,132,199,0.1);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px;
  font-size: 1.4rem;
}
.pn-stat-title {font-weight: 700;font-size: 14px;margin-bottom: 4px;color: var(--text);}
.pn-stat-desc {font-size: 12px;color: var(--text-muted);}

/* =============================================
   INSTRUCTIONS + NOTES
   ============================================= */
.pn-info-section {
  padding: 64px 20px;
}
.pn-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  max-width: 1200px;
  margin: 0 auto;
}
.pn-section-title { font-size: 1.9rem; font-weight: 800; margin-bottom: 6px; color: var(--text); }
.pn-section-sub { color: var(--text-muted); margin-bottom: 32px; }

.pn-steps { display: flex; flex-direction: column; gap: 20px; }
.pn-step { display: flex; gap: 14px; align-items: flex-start; }
.pn-step-num {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(2,132,199,0.35);
  font-size: 0.95rem;
}
.pn-step p { padding-top: 6px; line-height: 1.6; color: var(--text); }

.pn-note-box {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 24px;
  padding: 28px;
}
[data-theme="dark"] .pn-note-box {
  background: rgba(30,58,138,0.15);
  border-color: rgba(59,130,246,0.3);
}
.pn-note-head {
  display: flex; align-items: center; gap: 12px; margin-bottom: 20px;
}
.pn-note-icon {
  padding: 8px;
  background: rgba(59,130,246,0.15);
  border-radius: 10px;
  color: #3b82f6;
  font-size: 1.2rem;
  display: flex; align-items: center;
}
.pn-note-title { font-size: 1.3rem; font-weight: 800; color: #1e3a8a; }
[data-theme="dark"] .pn-note-title { color: #93c5fd; }
.pn-note-list {
  list-style: disc;
  padding-left: 20px;
  display: flex; flex-direction: column; gap: 12px;
  color: #1d4ed8;
  font-size: 0.9rem; line-height: 1.7;
}
[data-theme="dark"] .pn-note-list { color: #93c5fd; }

/* =============================================
   FAQ
   ============================================= */
.pn-faq-section {
  background: var(--surface-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 64px 20px;
}
.pn-faq-header { text-align: center; margin-bottom: 40px; }
.pn-faq-list { display: flex; flex-direction: column; gap: 12px; }
.pn-faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.pn-faq-item:hover { border-color: rgba(2,132,199,0.3); }
.pn-faq-btn {
  width: 100%;
  padding: 18px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  background: none;
  border: none;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}
.pn-faq-icon {
  flex-shrink: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: transform 0.3s;
}
.pn-faq-icon.open { transform: rotate(180deg); }
.pn-faq-answer {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-sec);
  line-height: 1.7;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

/* =============================================
   ARTICLE SECTION
   ============================================= */
.pn-article-section {
  padding: 64px 20px;
  border-top: 1px solid var(--border);
}
.pn-article-title { font-size: 1.5rem; font-weight: 800; margin-bottom: 24px; color: var(--text); }
.pn-article-body {
  color: var(--text-sec);
  line-height: 1.85;
  font-size: 0.95rem;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.pn-article-body strong { color: var(--text); font-weight: 700; }

.pn-expand-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  padding: 10px 22px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  transition: all 0.2s;
}
.pn-expand-btn:hover {
  border-color: rgba(2,132,199,0.4);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.pn-expand-btn i { color: var(--primary); transition: transform 0.3s; }

/* =============================================
   FOOTER (Modified for Nukeviet integration)
   ============================================= */
.pn-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 48px 20px;
}
.pn-footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}
.pn-footer-brand {
  display: flex; align-items: center; gap: 8px; opacity: 0.8;
}
.pn-footer-brand i { color: var(--primary); font-size: 1.2rem; }
.pn-footer-brand span { font-weight: 800; font-size: 1.1rem; letter-spacing: -0.02em; color: var(--text); }
.pn-footer-brand span em { font-style: normal; color: var(--primary); }
.pn-footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}
.pn-footer-links { display: flex; gap: 16px; }
.pn-footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  transition: color 0.2s;
}
.pn-footer-links a:hover { color: var(--primary); }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
  .pn-info-grid { grid-template-columns: 1fr; gap: 28px; }
  .pn-stats-grid { grid-template-columns: 1fr; }
  .pn-footer-inner { flex-direction: column; text-align: center; }
  .pn-vehicle-grid { grid-template-columns: repeat(3, 1fr); }
  .pn-hero { padding: 40px 16px 60px; }
  .pn-info-section { padding: 40px 16px; }
}

@media (max-width: 480px) {
  .pn-card-body { padding: 20px; }
  .pn-hero-title { font-size: 1.75rem; }
}