/* BhuX - Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Noto+Sans+Devanagari:wght@400;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-primary: #06090f;
  --bg-secondary: #0c1220;
  --bg-card: rgba(14, 22, 40, 0.7);
  --bg-card-hover: rgba(20, 30, 55, 0.8);
  --bg-input: rgba(10, 18, 35, 0.9);
  --border: rgba(0, 212, 170, 0.12);
  --border-hover: rgba(0, 212, 170, 0.3);
  --accent: #00d4aa;
  --accent-light: #00f0c0;
  --accent-blue: #00b4d8;
  --accent-gradient: linear-gradient(135deg, #00d4aa, #00b4d8);
  --accent-glow: 0 0 30px rgba(0, 212, 170, 0.15);
  --text-primary: #e8edf5;
  --text-secondary: #8892a8;
  --text-muted: #556078;
  --success: #00d4aa;
  --warning: #ffb347;
  --error: #ff6b6b;
  --info: #00b4d8;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', sans-serif;
  --font-hindi: 'Noto Sans Devanagari', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Background Effect */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: radial-gradient(ellipse at 20% 20%, rgba(0,212,170,0.06) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 80%, rgba(0,180,216,0.04) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* Header */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(6, 9, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}
.header-inner {
  max-width: 1440px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none;
}
.logo-icon {
  width: 38px; height: 38px;
  background: var(--accent-gradient);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800; color: #06090f;
}
.logo-text { font-size: 22px; font-weight: 700; color: var(--text-primary); letter-spacing: -0.5px; }
.logo-text span { background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.logo-sub { font-size: 11px; color: var(--text-muted); letter-spacing: 1px; text-transform: uppercase; }
.header-actions { display: flex; gap: 8px; align-items: center; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  font-family: var(--font); font-size: 14px; font-weight: 500;
  cursor: pointer; border: none;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--accent-gradient); color: #06090f; font-weight: 600;
  box-shadow: 0 4px 15px rgba(0,212,170,0.25);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 25px rgba(0,212,170,0.35); }
.btn-secondary {
  background: var(--bg-card); color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--border-hover); background: var(--bg-card-hover); }
.btn-ghost { background: transparent; color: var(--text-secondary); padding: 8px 12px; }
.btn-ghost:hover { color: var(--accent); }
.btn-icon {
  width: 32px; height: 32px; padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: transparent; color: var(--text-secondary); cursor: pointer;
  transition: all var(--transition);
}
.btn-icon:hover { color: var(--accent); border-color: var(--accent); }
.btn-sm { padding: 6px 14px; font-size: 13px; }

/* Main Layout */
.main { max-width: 1440px; margin: 0 auto; padding: 24px; position: relative; z-index: 1; }
.grid-layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 24px;
  min-height: calc(100vh - 140px);
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  overflow: hidden;
}
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.card-title {
  font-size: 15px; font-weight: 600;
  display: flex; align-items: center; gap: 8px;
}
.card-title svg { color: var(--accent); }
.card-body { padding: 20px; }

/* Tabs */
.tabs { display: flex; gap: 4px; padding: 4px; background: var(--bg-input); border-radius: var(--radius-sm); }
.tab-btn {
  flex: 1; padding: 8px 12px;
  background: transparent; border: none; border-radius: 6px;
  color: var(--text-muted); font-family: var(--font);
  font-size: 13px; font-weight: 500; cursor: pointer;
  transition: all var(--transition);
}
.tab-btn.active { background: var(--accent); color: #06090f; font-weight: 600; }
.tab-btn:hover:not(.active) { color: var(--text-primary); }
.tab-content { display: none; padding-top: 16px; }
.tab-content.active { display: block; animation: fadeIn 0.3s ease; }

/* Input */
textarea, input[type="text"], input[type="number"] {
  width: 100%; padding: 12px 14px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-family: var(--font-mono); font-size: 13px;
  transition: border-color var(--transition);
  resize: vertical;
}
textarea:focus, input:focus { outline: none; border-color: var(--accent); }
textarea { min-height: 160px; line-height: 1.8; }
.input-hint { font-size: 12px; color: var(--text-muted); margin-top: 8px; }

/* Drop Zone */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px; text-align: center;
  cursor: pointer; transition: all var(--transition);
}
.drop-zone:hover, .drop-zone.drag-over { border-color: var(--accent); background: rgba(0,212,170,0.05); }
.drop-zone-icon { font-size: 36px; margin-bottom: 8px; }
.drop-zone-text { color: var(--text-secondary); font-size: 14px; }
.drop-zone-sub { color: var(--text-muted); font-size: 12px; margin-top: 4px; }
.file-status { display: none; margin-top: 12px; color: var(--success); font-size: 13px; }
.file-status.visible { display: block; }

/* Sample Cards */
.sample-grid { display: flex; flex-direction: column; gap: 10px; }
.sample-btn {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; background: var(--bg-input);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  cursor: pointer; transition: all var(--transition);
  text-align: left; width: 100%; font-family: var(--font);
}
.sample-btn:hover { border-color: var(--accent); background: rgba(0,212,170,0.06); transform: translateX(4px); }
.sample-btn .sample-icon { font-size: 24px; }
.sample-btn .sample-name { font-weight: 600; font-size: 14px; color: var(--text-primary); }
.sample-btn .sample-detail { font-size: 12px; color: var(--text-muted); }

/* Plot Info */
.plot-info-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 10px; margin-top: 16px;
}
.plot-info-group { display: flex; flex-direction: column; gap: 4px; }
.plot-info-group label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.plot-info-group input { padding: 8px 10px; font-family: var(--font); font-size: 13px; }

/* Action Bar */
.action-bar {
  display: flex; gap: 8px; margin-top: 16px;
  padding-top: 16px; border-top: 1px solid var(--border);
}
.action-bar .btn { flex: 1; justify-content: center; }

/* Map Container */
.map-wrapper { position: relative; border-radius: var(--radius-lg); overflow: hidden; }
#map { width: 100%; height: 100%; min-height: 500px; background: var(--bg-secondary); z-index: 1; }
.map-controls {
  position: absolute; top: 12px; left: 12px; z-index: 1000;
  display: flex; gap: 6px;
}
.layer-btn {
  padding: 6px 14px; background: rgba(6,9,15,0.85);
  backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.1);
  border-radius: 20px; color: var(--text-secondary);
  font-family: var(--font); font-size: 12px; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
}
.layer-btn.active, .layer-btn:hover { background: var(--accent); color: #06090f; border-color: var(--accent); }
.map-tools {
  position: absolute; top: 12px; right: 12px; z-index: 1000;
  display: flex; gap: 6px;
}

/* Results Panel */
#results-panel {
  display: none; margin-top: 24px;
  animation: slideUp 0.5s ease;
}
#results-panel.visible { display: block; }

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px; margin-bottom: 24px;
}
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
  text-align: center; transition: all var(--transition);
}
.stat-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.stat-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 6px; }
.stat-value {
  font-size: 20px; font-weight: 700;
  background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  font-family: var(--font-mono);
}
.stat-value.stat-updated { animation: pulse 0.5s ease; }
.stat-unit { font-size: 11px; color: var(--text-muted); margin-top: 2px; }

/* Coordinate Table */
.table-wrapper { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th {
  background: var(--bg-input); padding: 12px 14px;
  text-align: left; font-weight: 600; font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.5px;
  color: var(--text-muted); border-bottom: 1px solid var(--border);
  position: sticky; top: 0;
}
td { padding: 10px 14px; border-bottom: 1px solid var(--border); }
tr:hover td { background: rgba(0,212,170,0.03); }
tr:last-child td { border-bottom: none; }
.mono { font-family: var(--font-mono); font-size: 12px; }
.lat { color: var(--accent); }
.lng { color: var(--accent-blue); }
.point-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent-gradient); color: #06090f;
  font-weight: 700; font-size: 12px;
}

/* Export Panel */
#export-panel {
  display: none; margin-top: 24px;
}
#export-panel.visible { display: block; animation: fadeIn 0.3s ease; }
.export-grid { display: flex; gap: 10px; flex-wrap: wrap; }
.export-btn {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 20px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius);
  cursor: pointer; transition: all var(--transition);
  font-family: var(--font); color: var(--text-primary); font-size: 14px;
}
.export-btn:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--accent-glow); }
.export-btn .export-icon { font-size: 20px; }
.export-btn .export-label { font-weight: 600; }
.export-btn .export-desc { font-size: 11px; color: var(--text-muted); }

/* Modal */
.modal { display: none; position: fixed; inset: 0; z-index: 2000; align-items: center; justify-content: center; }
.modal.visible { display: flex; }
.modal-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(5px); }
.modal-content {
  position: relative; z-index: 1;
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  width: 90%; max-width: 440px;
}
.modal-close {
  position: absolute; top: 12px; right: 12px;
  background: none; border: none; color: var(--text-muted);
  cursor: pointer; font-size: 20px;
}
.modal-title { font-size: 18px; font-weight: 700; margin-bottom: 16px; }
.reverse-result-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0; border-bottom: 1px solid var(--border);
}
.reverse-result-item .label { color: var(--text-secondary); }
.reverse-result-item .value { font-weight: 600; }

/* Toast */
#toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 20px; border-radius: var(--radius-sm);
  background: var(--bg-secondary); border: 1px solid var(--border);
  color: var(--text-primary); font-size: 14px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.3);
  transform: translateX(120%); transition: transform 0.3s ease;
  backdrop-filter: blur(10px);
}
.toast.toast-visible { transform: translateX(0); }
.toast-success .toast-icon { color: var(--success); }
.toast-error .toast-icon { color: var(--error); }
.toast-warning .toast-icon { color: var(--warning); }
.toast-info .toast-icon { color: var(--info); }

/* Map Labels */
.area-label { background: none !important; border: none !important; }
.area-label-content {
  display: flex; flex-direction: column; align-items: center;
  background: rgba(6,9,15,0.85); backdrop-filter: blur(10px);
  padding: 8px 14px; border-radius: 8px;
  border: 1px solid var(--accent);
}
.area-value { color: var(--accent); font-weight: 700; font-size: 13px; font-family: var(--font-mono); }
.area-sub { color: var(--text-muted); font-size: 11px; }
.edge-label { background: none !important; border: none !important; }
.edge-label span {
  background: rgba(6,9,15,0.8); color: #ff6b6b;
  padding: 2px 6px; border-radius: 4px; font-size: 11px;
  font-family: var(--font-mono);
}
.distance-label { background: none !important; border: none !important; }
.distance-label span {
  background: rgba(6,9,15,0.8); color: #ff6b6b;
  padding: 2px 8px; border-radius: 4px; font-size: 12px;
}
.custom-tooltip {
  background: rgba(6,9,15,0.9) !important; border: 1px solid var(--accent) !important;
  color: var(--text-primary) !important; border-radius: 8px !important;
  padding: 8px 12px !important; font-family: var(--font) !important;
  font-size: 12px !important; box-shadow: 0 4px 20px rgba(0,0,0,0.3) !important;
}
.custom-tooltip::before { border-top-color: var(--accent) !important; }

/* Leaflet overrides */
.leaflet-control-zoom a {
  background: rgba(6,9,15,0.85) !important; color: var(--text-primary) !important;
  border-color: var(--border) !important; backdrop-filter: blur(10px);
}
.leaflet-control-zoom a:hover { background: var(--accent) !important; color: #06090f !important; }
.leaflet-control-scale-line { background: rgba(6,9,15,0.7) !important; color: var(--text-primary) !important; border-color: var(--accent) !important; }

/* Animations */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.05); } }
.animate-in { animation: slideUp 0.6s ease forwards; opacity: 0; }

/* Hero Section */
.hero-banner {
  text-align: center; padding: 40px 20px 32px;
  background: linear-gradient(180deg, rgba(0,212,170,0.06) 0%, transparent 100%);
  border-bottom: 1px solid var(--border); margin-bottom: 24px;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}
.hero-title { font-size: 36px; font-weight: 800; letter-spacing: -1px; margin-bottom: 8px; }
.hero-title span { background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-subtitle { color: var(--text-secondary); font-size: 16px; max-width: 600px; margin: 0 auto 16px; }
.hero-badges { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.badge {
  padding: 6px 14px; border-radius: 20px; font-size: 12px; font-weight: 500;
  background: var(--bg-card); border: 1px solid var(--border); color: var(--text-secondary);
}
.badge-accent { border-color: rgba(0,212,170,0.3); color: var(--accent); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* Print */
@media print {
  .header, .sidebar, .action-bar, #export-panel, .map-controls, .map-tools, .btn { display: none !important; }
  #map { height: 600px !important; }
  body { background: white; color: black; }
  .card { border-color: #ccc; background: white; }
}

/* Responsive */
@media (max-width: 1024px) {
  .grid-layout { grid-template-columns: 1fr; }
  #map { min-height: 400px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .main { padding: 12px; }
  .hero-title { font-size: 26px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .export-grid { flex-direction: column; }
  .plot-info-grid { grid-template-columns: 1fr; }
  .map-controls { flex-wrap: wrap; }
  .header-inner { height: 56px; }
  .logo-text { font-size: 18px; }
}