:root {
  --bg: #0f1113;
  --card: #171a1c;
  --accent: #d3121a;
  --accent-hover: #b30e15;
  --text: #ffffff;
  --subtle: #9aa0a6;
}

body.light {
  --bg: #f5f5f5;
  --card: #ffffff;
  --text: #111111;
  --subtle: #555555;
}

* {
  box-sizing: border-box;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 0;
  padding: 0;
  transition: background 0.3s ease, color 0.3s ease;
}

/* Top bar */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: #00000055;
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.logo-text {
  font-weight: 800;
  letter-spacing: 2px;
  font-size: 18px;
}

.theme-toggle {
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--text);
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13px;
}

.theme-toggle:hover {
  background: var(--accent);
  color: #fff;
}

/* Layout */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

.title {
  text-align: center;
  margin-bottom: 24px;
  letter-spacing: 1px;
}

/* Cards */
.card {
  background: var(--card);
  padding: 20px;
  margin-bottom: 20px;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

label {
  display: block;
  margin-bottom: 8px;
  margin-top: 8px;
}

input {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #222;
  background: #0d0d0d;
  color: var(--text);
  margin-bottom: 8px;
}
body.light input {
  background: #fafafa;
  border-color: #ddd;
}

/* Primary button */
.submit-btn {
  width: 100%;
  padding: 12px;
  border: none;
  background: var(--accent);
  color: white;
  border-radius: 10px;
  cursor: pointer;
  font-weight: bold;
  margin-top: 8px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s;
}

.submit-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.4);
}

/* Store buttons */
.store-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.store-btn {
  flex: 1;
  padding: 10px 14px;
  background: #0d0d0d;
  border: 2px solid var(--accent);
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  text-align: center;
  font-weight: 600;
  transition: transform 0.15s ease, background 0.15s, box-shadow 0.15s;
}

.store-btn.selected,
.store-btn:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 8px 16px rgba(0,0,0,0.5);
}

.selected-store {
  margin-top: 10px;
  font-size: 14px;
  color: var(--subtle);
}

/* Error box */
.error {
  border-left: 4px solid #ff5252;
}

/* Summary & breakdown */
.section-title {
  margin-top: 0;
  font-size: 22px;
  margin-bottom: 15px;
}

.summary-box {
  display: flex;
  align-items: center;
  gap: 16px;
}

.summary-product-image {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 12px;
}

.summary-text {
  flex: 1;
}

.final-price {
  font-size: 32px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 6px;
}

.details-btn,
.whatsapp-btn {
  width: 100%;
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-weight: 600;
}

.details-btn {
  background: #0d0d0d;
  color: var(--text);
  border: 1px solid var(--accent);
}

.details-btn:hover {
  background: var(--accent-hover);
  color: #fff;
}

.whatsapp-btn {
  background: #25D366;
  color: #fff;
}

.whatsapp-btn:hover {
  filter: brightness(1.05);
}

/* Breakdown table */
.breakdown-table {
  margin-top: 20px;
  display: grid;
  grid-template-columns: 180px auto;
  gap: 8px;
}

.breakdown-label {
  font-weight: bold;
  color: var(--subtle);
}

/* Loading */
.loading {
  text-align: center;
  padding: 18px;
  color: var(--subtle);
}

.spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 4px solid #222;
  border-top-color: var(--accent);
  margin: 0 auto 10px;
  animation: spin 0.9s linear infinite;
}

.hidden {
  display: none;
}

/* Admin link*/
.admin-link {
  margin-right: 16px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.admin-link:hover {
  color: var(--accent-hover);
}


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

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-up {
  animation: fadeUp 0.4s ease-out;
}

.pulse {
  animation: pulseBtn 1.5s ease-in-out infinite;
}

@keyframes pulseBtn {
  0%, 100% { box-shadow: 0 0 0 0 rgba(211,18,26,0.6); }
  50% { box-shadow: 0 0 0 12px rgba(211,18,26,0); }
}

/* Responsive */
@media (max-width: 640px) {
  .summary-box {
    flex-direction: column;
    align-items: flex-start;
  }

  .breakdown-table {
    grid-template-columns: 1fr;
  }
}