/* ============================================================
   NGUYỄN ROASTERY — DESIGN SYSTEM
   main.css — Tokens, Reset, Typography, Utilities
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Inter:wght@300;400;500;600;700&display=swap');

/* ── CSS Custom Properties ─────────────────────────────── */
:root {
  /* Colors */
  --clr-bg:          #F9F6F0;
  --clr-bg-secondary:#E6D5C3;
  --clr-text:        #2C1E16;
  --clr-text-muted:  #6B5344;
  --clr-accent:      #D4A373;
  --clr-accent-dark: #B8865A;
  --clr-accent-light:#F0D9BE;
  --clr-dark:        #1A120B;
  --clr-white:       #FFFFFF;
  --clr-border:      rgba(44,30,22,0.12);
  --clr-overlay:     rgba(26,18,11,0.55);

  /* Typography */
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans:  'Inter', -apple-system, sans-serif;

  /* Spacing scale */
  --sp-1:   0.25rem;
  --sp-2:   0.5rem;
  --sp-3:   0.75rem;
  --sp-4:   1rem;
  --sp-5:   1.25rem;
  --sp-6:   1.5rem;
  --sp-8:   2rem;
  --sp-10:  2.5rem;
  --sp-12:  3rem;
  --sp-16:  4rem;
  --sp-20:  5rem;
  --sp-24:  6rem;
  --sp-32:  8rem;

  /* Border radius */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(44,30,22,0.08), 0 1px 2px rgba(44,30,22,0.04);
  --shadow-md:  0 4px 12px rgba(44,30,22,0.12), 0 2px 6px rgba(44,30,22,0.06);
  --shadow-lg:  0 12px 32px rgba(44,30,22,0.14), 0 4px 12px rgba(44,30,22,0.08);
  --shadow-xl:  0 24px 64px rgba(44,30,22,0.18), 0 8px 24px rgba(44,30,22,0.10);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --max-width:   1280px;
  --nav-height:  72px;
}

/* ── Reset & Base ──────────────────────────────────────── */
*, *::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(--clr-bg);
  color: var(--clr-text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

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

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ── Typography Scale ──────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  line-height: 1.25;
  color: var(--clr-text);
  font-weight: 600;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); }
h3 { font-size: clamp(1.35rem, 2.5vw, 2rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--clr-text-muted);
}

.text-xl   { font-size: 1.25rem; }
.text-lg   { font-size: 1.125rem; }
.text-sm   { font-size: 0.875rem; }
.text-xs   { font-size: 0.75rem; }

.font-serif { font-family: var(--font-serif); }
.font-sans  { font-family: var(--font-sans); }

.text-accent { color: var(--clr-accent); }
.text-muted  { color: var(--clr-text-muted); }
.text-white  { color: var(--clr-white); }
.text-center { text-align: center; }
.text-right  { text-align: right; }

/* ── Layout Utilities ──────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.section {
  padding: var(--sp-20) 0;
}

.section-sm {
  padding: var(--sp-12) 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-8);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-6);
}

.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-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.gap-6 { gap: var(--sp-6); }
.gap-8 { gap: var(--sp-8); }

/* ── Spacing Utilities ─────────────────────────────────── */
.mt-2  { margin-top: var(--sp-2); }
.mt-4  { margin-top: var(--sp-4); }
.mt-6  { margin-top: var(--sp-6); }
.mt-8  { margin-top: var(--sp-8); }
.mb-2  { margin-bottom: var(--sp-2); }
.mb-4  { margin-bottom: var(--sp-4); }
.mb-6  { margin-bottom: var(--sp-6); }
.mb-8  { margin-bottom: var(--sp-8); }

/* ── Divider ────────────────────────────────────────────── */
.divider {
  width: 60px;
  height: 2px;
  background: var(--clr-accent);
  margin: var(--sp-4) auto;
}

.divider-left {
  margin-left: 0;
}

/* ── Badge ──────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge-accent {
  background: var(--clr-accent-light);
  color: var(--clr-accent-dark);
}

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

/* ── Overlay ────────────────────────────────────────────── */
.overlay {
  position: absolute;
  inset: 0;
  background: var(--clr-overlay);
}

/* ── Page Top Padding ───────────────────────────────────── */
.page-top {
  padding-top: var(--nav-height);
}

/* ── Scroll reveal animation ─────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ── Loading Spinner ─────────────────────────────────────── */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--clr-accent-light);
  border-top-color: var(--clr-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: var(--sp-8) auto;
}

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

/* ── Toast Notification ──────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: var(--sp-6);
  right: var(--sp-6);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5);
  background: var(--clr-dark);
  color: var(--clr-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  font-weight: 500;
  animation: slideInRight 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
  max-width: 320px;
}

.toast-icon { font-size: 1.1rem; }
.toast-success { border-left: 3px solid #4ade80; }
.toast-error   { border-left: 3px solid #f87171; }
.toast-info    { border-left: 3px solid var(--clr-accent); }

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(100%); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeOut {
  to { opacity: 0; transform: translateX(100%); }
}

/* ── Search Modal ─────────────────────────────────────────── */
.search-modal {
  position: fixed;
  inset: 0;
  background: rgba(26,18,11,0.85);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.search-modal.active {
  opacity: 1;
  pointer-events: all;
}

.search-modal-inner {
  width: 100%;
  max-width: 640px;
  padding: 0 var(--sp-6);
}

.search-modal-input {
  width: 100%;
  background: var(--clr-white);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--sp-5) var(--sp-6);
  font-size: 1.25rem;
  font-family: var(--font-sans);
  color: var(--clr-text);
  box-shadow: var(--shadow-xl);
  outline: none;
}

.search-modal-results {
  margin-top: var(--sp-3);
  background: var(--clr-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 1px solid var(--clr-border);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.search-result-item:hover {
  background: var(--clr-accent-light);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-img {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

/* ── Responsive Breakpoints ──────────────────────────────── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --nav-height: 60px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: var(--sp-12) 0; }
  .container { padding: 0 var(--sp-4); }
}

@media (max-width: 480px) {
  .section { padding: var(--sp-10) 0; }
}