/* ============================================================
   BASE.CSS — Reset, Typography, Layout, Utilities
   ============================================================ */

/* ── Google Fonts Import ──────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=DM+Sans:wght@300;400;500;600&family=Cormorant+Garamond:wght@400;600;700&family=Nunito:wght@400;600;700&family=Righteous&family=Poppins:wght@400;500;600&family=Exo+2:wght@400;500;700&family=Inter:wght@400;500;600&family=Playfair+Display:wght@400;700;900&family=Source+Sans+3:wght@400;600&family=JetBrains+Mono:wght@400;500&display=swap');

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

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-body);
}

input, textarea, select {
  font-family: var(--font-body);
  outline: none;
}

ul, ol { list-style: none; }

/* ── Typography ───────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.15;
  color: var(--color-text);
}

h1 { font-size: clamp(2.5rem, 8vw, 5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 5vw, 3rem); }
h3 { font-size: clamp(1.3rem, 3vw, 1.8rem); }
h4 { font-size: 1.1rem; font-weight: 600; font-family: var(--font-body); }

p { color: var(--color-text-2); }

.text-primary { color: var(--color-primary); }
.text-accent  { color: var(--color-accent); }
.text-muted   { color: var(--color-text-3); }
.text-inv     { color: var(--color-text-inv); }

/* ── Layout ───────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

@media (min-width: 768px) {
  .container { padding: 0 2rem; }
}

@media (min-width: 1024px) {
  .container { padding: 0 2.5rem; }
}

.section {
  padding: 5rem 0;
}

.section--sm { padding: 3rem 0; }
.section--lg { padding: 8rem 0; }

.section__header {
  margin-bottom: 3rem;
}

.section__label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.section__sub {
  color: var(--color-text-2);
  font-size: 1rem;
  max-width: 520px;
}

/* Grid system */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--auto { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

@media (max-width: 767px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .grid--2-mobile { grid-template-columns: repeat(2, 1fr); }
}

/* Flex utilities */
.flex       { display: flex; }
.flex-col   { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-1  { gap: 0.5rem; }
.gap-2  { gap: 1rem; }
.gap-3  { gap: 1.5rem; }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  transition: transform var(--transition-base), opacity var(--transition-base), box-shadow var(--transition-base);
  user-select: none;
  white-space: nowrap;
  text-decoration: none;
  min-height: 48px;
}

.btn:active { transform: scale(0.97); }

.btn--primary {
  background: var(--gradient-primary);
  color: var(--color-text-inv);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.35);
}

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

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--ghost {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.btn--ghost:hover {
  background: var(--color-surface);
}

.btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  min-height: 38px;
}

.btn--icon {
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn--icon-sm {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-sm);
}

/* ── Cards ────────────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ── Badges ───────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge--primary {
  background: var(--color-primary);
  color: var(--color-text-inv);
}

.badge--outline {
  border: 1px solid var(--color-border);
  color: var(--color-text-2);
}

.badge--success {
  background: rgba(34,197,94,0.15);
  color: var(--color-success);
}

/* ── Form Elements ────────────────────────────────────────── */
.input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--color-surface-2);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast);
}

.input:focus {
  border-color: var(--color-primary);
}

.input::placeholder {
  color: var(--color-text-3);
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-2);
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}

/* ── Toast ────────────────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 5.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s var(--transition-spring) both;
  pointer-events: auto;
}

.toast.removing {
  animation: toastOut 0.25s ease forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(12px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes toastOut {
  to   { opacity: 0; transform: translateY(-8px) scale(0.95); }
}

/* ── Divider ──────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--color-border);
  margin: 2rem 0;
}

/* ── Overlay ──────────────────────────────────────────────── */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 800;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  backdrop-filter: blur(4px);
}

.overlay.open {
  opacity: 1;
  visibility: visible;
}

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--color-primary); }

/* ── Visibility Utilities ─────────────────────────────────── */
.hidden    { display: none !important; }
.invisible { visibility: hidden; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* ── Spacers ──────────────────────────────────────────────── */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* ── Loading Skeleton ─────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--color-surface) 25%, var(--color-surface-2) 50%, var(--color-surface) 75%);
  background-size: 200% 100%;
  animation: skeleton-wave 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-wave {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Reduced motion ───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}