/* ============================================
   THỔ MOBI — Base & Reset Styles
   Luxury Dark Gold Design System
   ============================================ */

/* Fonts loaded via <link> tags: Cinzel, Raleway, Inter, Oswald */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: 1.65;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection {
  background: rgba(201, 168, 76, 0.3);
  color: #FFFFFF;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  border: none;
}
input:focus-visible, textarea:focus-visible, select:focus-visible, button:focus-visible, a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  letter-spacing: 0.03em;
}

h1 { font-size: clamp(28px, 5vw, 52px); font-weight: 700; line-height: 1.15; }
h2 { font-size: clamp(20px, 3vw, 30px); font-weight: 600; line-height: 1.25; }
h3 { font-size: clamp(16px, 2vw, 20px); font-weight: 600; line-height: 1.3; }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

.hidden { display: none; }
.block { display: block; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--gold-gradient);
  color: #1A1208;
  font-weight: var(--font-weight-semibold);
  border: none;
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  color: #1A1208;
  box-shadow: var(--shadow-gold);
}

.btn--danger {
  background: var(--gold-gradient);
  color: #1A1208;
  font-weight: var(--font-weight-semibold);
}
.btn--danger:hover {
  background: var(--color-primary-hover);
  color: #1A1208;
  box-shadow: var(--shadow-gold);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn--outline:hover {
  background-color: var(--color-primary-bg);
  color: var(--color-primary);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.btn--ghost:hover {
  background-color: var(--color-bg);
}

/* Button press feedback */
.btn:active:not(:disabled) { transform: scale(0.97); }
.btn:disabled, .btn--disabled { opacity: 0.6; pointer-events: none; cursor: not-allowed; }

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-base);
  border-radius: var(--border-radius-lg);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-xs);
}

.btn--pill {
  border-radius: var(--border-radius-pill);
}

.btn--full {
  width: 100%;
}

/* Cards */
.card {
  background: var(--color-bg-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.badge--discount {
  background-color: var(--color-discount);
  color: white;
}

.badge--warranty {
  background-color: var(--color-primary-bg);
  color: var(--color-primary);
}

/* Section spacing */
.section {
  padding: var(--space-12) 0;
}

.section__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-dark);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-6);
}

/* Responsive */
@media (max-width: 599px) {
  body {
    padding-bottom: var(--bottom-nav-height);
  }
  h1 { font-size: var(--font-size-2xl); }
  h2 { font-size: var(--font-size-xl); }
  .container { padding: 0 var(--space-4); }
  .section { padding: var(--space-8) 0; }
  .desktop-only { display: none !important; }
}

@media (min-width: 600px) {
  .mobile-only { display: none !important; }
}

@media (min-width: 900px) {
  .container { padding: 0 var(--space-8); }
}

@media (min-width: 1200px) {
  .container { padding: 0 var(--space-16); }
}