:root {
  --bg-main: #0b0f19;
  --bg-card: rgba(18, 26, 44, 0.75);
  --bg-card-hover: rgba(28, 40, 68, 0.85);
  --border-color: rgba(255, 255, 255, 0.1);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --primary: #10b981;
  --primary-glow: rgba(16, 185, 129, 0.25);
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --card-radius: 16px;
  --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --font-family: 'Kanit', sans-serif;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
}

body {
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 0% 0%, rgba(16, 185, 129, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(59, 130, 246, 0.12) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  padding-bottom: 50px;
}

/* App Container */
.app-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 20px;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 20px 28px;
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--accent-blue));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.brand-text h1 {
  font-size: 22px;
  font-weight: 700;
  background: linear-gradient(90deg, #fff, #93c5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text p {
  font-size: 13px;
  color: var(--text-muted);
}

.header-status {
  display: flex;
  align-items: center;
  gap: 16px;
}

.time-badge {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 13px;
  color: #60a5fa;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  gap: 12px;
  margin-bottom: 28px;
  background: rgba(15, 23, 42, 0.6);
  padding: 6px;
  border-radius: 14px;
  border: 1px solid var(--border-color);
}

.tab-btn {
  flex: 1;
  padding: 14px 20px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.04);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--primary), #059669);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 15px var(--primary-glow);
}

/* Cards & Layout */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
}

/* Forms & Inputs */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}

.form-control {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
  color: #ffffff;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 15px;
  outline: none;
  width: 100%;
  transition: all 0.2s ease;
  color-scheme: dark;
}

input[type="date"].form-control {
  cursor: pointer;
}

input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(1);
  cursor: pointer;
  opacity: 0.8;
  padding: 4px;
  border-radius: 4px;
}

input[type="date"]::-webkit-calendar-picker-indicator:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.15);
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Price Grid */
.price-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.category-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 20px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.category-card:hover {
  transform: translateY(-2px);
  border-color: rgba(16, 185, 129, 0.3);
}

.category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.category-name {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
}

.median-pill {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.05));
  border: 1px solid var(--primary);
  color: #34d399;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
}

.company-price-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
}

.company-price-row:last-child {
  border-bottom: none;
}

.company-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.company-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-wongpanit { background-color: var(--accent-amber); }
.dot-wakeup { background-color: var(--accent-purple); }
.dot-wastebuy { background-color: var(--accent-blue); }

.company-name {
  font-size: 14px;
  color: var(--text-main);
}

.company-subtext {
  font-size: 11px;
  color: var(--text-muted);
}

.price-value {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
}

.no-data {
  color: var(--accent-rose);
  font-size: 13px;
  font-style: italic;
}

/* Buttons */
.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.25s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #059669);
  color: #fff;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.btn-danger {
  background: rgba(244, 63, 94, 0.15);
  color: #f43f5e;
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.btn-danger:hover {
  background: rgba(244, 63, 94, 0.25);
}

/* Table */
.custom-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

.custom-table th, .custom-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.custom-table th {
  background: rgba(0, 0, 0, 0.2);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.custom-table td {
  font-size: 14px;
  color: var(--text-main);
}

.custom-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Winner Banner */
.winner-card {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(59, 130, 246, 0.15));
  border: 1px solid var(--primary);
  border-radius: var(--card-radius);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.15);
}

.winner-trophy {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.winner-info h3 {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.winner-info p {
  font-size: 14px;
  color: #a7f3d0;
}

/* Checkbox group */
.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.04);
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.checkbox-label:hover {
  background: rgba(255, 255, 255, 0.08);
}

.checkbox-label input[type="checkbox"] {
  accent-color: var(--primary);
  width: 16px;
  height: 16px;
}

/* Responsive */
@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .nav-tabs {
    flex-direction: column;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .winner-card {
    flex-direction: column;
    text-align: center;
  }
}