/* ==========================================================================
   Base & Typography - Khyber Stores
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.modal-open {
  overflow: hidden;
}

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

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-brand-black);
  letter-spacing: -0.01em;
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

@media (min-width: 768px) {
  h1 { font-size: var(--text-5xl); }
  h2 { font-size: var(--text-4xl); }
}

p {
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  font-weight: 400;
}

/* Containers */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all var(--transition-normal);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-brand-black);
  color: var(--color-text-inverse);
  box-shadow: 0 4px 14px rgba(18, 17, 16, 0.2);
}

.btn-primary:hover {
  background-color: #2a2825;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(18, 17, 16, 0.28);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-brand-black);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-surface-subtle);
  border-color: var(--color-brand-black);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-brand-black);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-brand-black);
  background-color: var(--color-surface);
}

.btn-sm {
  padding: 0.55rem 1.1rem;
  font-size: var(--text-xs);
}

.btn-block {
  width: 100%;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.28rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-accent {
  background-color: var(--color-accent-soft);
  color: var(--color-accent-terracotta);
}

.product-badge {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--color-brand-black);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.03em;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.product-badge-soft {
  background: var(--color-surface-subtle);
  color: var(--color-text-secondary);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Form Controls */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}

.form-group label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--text-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-brand-black);
  box-shadow: 0 0 0 3px rgba(18, 17, 16, 0.08);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

/* Utilities */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-free { color: var(--color-success); font-weight: 600; }