/* ============ GLOBAL ============ */
[hidden] { display: none !important; }

/* ============ DESIGN TOKENS ============ */
:root,
[data-theme='light'] {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --color-bg: #fbf6ef;
  --color-surface: #ffffff;
  --color-text: #2a1a10;
  --color-text-muted: #7a6557;
  --color-border: #ead9c5;
  --color-border-strong: #d6bfa3;
  --color-primary: #c2410c;
  --color-primary-hover: #9a3308;
  --color-primary-soft: #fde8d4;
  --color-accent: #16a34a;
  --color-error: #b91c1c;

  --shadow-sm: 0 1px 2px rgba(60, 30, 10, 0.05);
  --shadow-md: 0 4px 12px rgba(60, 30, 10, 0.08);
  --shadow-lg: 0 12px 32px rgba(60, 30, 10, 0.12);
}

[data-theme='dark'] {
  --color-bg: #1a120c;
  --color-surface: #251a12;
  --color-text: #f5ede3;
  --color-text-muted: #b39d8a;
  --color-border: #3a2a1e;
  --color-border-strong: #4d3826;
  --color-primary: #fb923c;
  --color-primary-hover: #fdba74;
  --color-primary-soft: #3a1f0d;
  --color-accent: #4ade80;
  --color-error: #f87171;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #1a120c;
    --color-surface: #251a12;
    --color-text: #f5ede3;
    --color-text-muted: #b39d8a;
    --color-border: #3a2a1e;
    --color-border-strong: #4d3826;
    --color-primary: #fb923c;
    --color-primary-hover: #fdba74;
    --color-primary-soft: #3a1f0d;
    --color-accent: #4ade80;
    --color-error: #f87171;
  }
}

/* ============ RESET ============ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: var(--text-base);
  line-height: 1.55;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

h1, h2, h3 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
  letter-spacing: -0.01em;
}

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

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

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-family: 'Fraunces', serif;
  font-weight: 600;
  font-size: var(--text-lg);
  text-decoration: none;
}
.logo:hover { text-decoration: none; }
.logo svg { color: var(--color-primary); }

.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  transition: background 0.15s, color 0.15s;
}
.theme-toggle:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.theme-toggle .icon-moon { display: none; }
[data-theme='dark'] .theme-toggle .icon-sun { display: none; }
[data-theme='dark'] .theme-toggle .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle .icon-sun { display: none; }
  :root:not([data-theme]) .theme-toggle .icon-moon { display: block; }
}

/* ============ HERO ============ */
.hero {
  text-align: center;
  padding-top: var(--space-16);
  padding-bottom: var(--space-10);
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(circle, var(--color-primary-soft) 0%, transparent 60%);
  opacity: 0.6;
  pointer-events: none;
  z-index: -1;
}
.hero h1 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
  font-weight: 800;
}
.hero-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto;
}

/* ============ CARD ============ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-6);
  margin-bottom: var(--space-8);
  position: relative;
}

/* ============ TABS ============ */
.tabs {
  display: flex;
  gap: var(--space-1);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-1);
  margin-bottom: var(--space-5);
}
.tab {
  flex: 1;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: background 0.15s, color 0.15s;
}
.tab.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}
.tab:hover:not(.active) { color: var(--color-text); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ============ FORM ============ */
.field-label {
  display: block;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

textarea, input[type="number"], input[type="text"] {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  transition: border-color 0.15s, box-shadow 0.15s;
}
textarea {
  resize: vertical;
  min-height: 140px;
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
}
textarea:focus, input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}
.hint {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

/* ============ INGREDIENT ROWS ============ */
.ingredient-rows {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.ing-row {
  display: grid;
  grid-template-columns: 80px 90px 1fr 36px;
  gap: var(--space-2);
  align-items: center;
}
.ing-row input {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
}
.remove-row {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}
.remove-row:hover {
  background: color-mix(in srgb, var(--color-error) 12%, transparent);
  color: var(--color-error);
}
@media (max-width: 540px) {
  .ing-row { grid-template-columns: 70px 80px 1fr 36px; gap: var(--space-1); }
}

/* ============ SCALE CONTROLS ============ */
.scale-block {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}
.scale-mode {
  display: flex;
  gap: var(--space-1);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-1);
  margin-bottom: var(--space-4);
}
.mode-btn {
  flex: 1;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: background 0.15s, color 0.15s;
}
.mode-btn.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

.mode-panel { display: none; }
.mode-panel.active { display: block; }

.quick-scales {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}
.scale-chip {
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: 'Fraunces', serif;
  color: var(--color-text);
  transition: all 0.15s;
}
.scale-chip:hover {
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.scale-chip.selected {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}
.scale-chip.selected:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: white;
}
.custom-mult {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.custom-mult label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  white-space: nowrap;
}
.custom-mult input { max-width: 120px; }

.servings-row {
  display: flex;
  align-items: end;
  gap: var(--space-3);
}
.servings-row > div { flex: 1; }
.servings-row label {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}
.arrow {
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  padding-bottom: var(--space-2);
}

/* ============ BUTTONS ============ */
.btn-primary {
  width: 100%;
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: 600;
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-primary:active { transform: scale(0.99); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  transition: all 0.15s;
}
.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ============ ERROR BANNER ============ */
#error-banner { margin-bottom: var(--space-6); }
.error-msg {
  margin: 0;
  padding: var(--space-3) var(--space-4);
  background: color-mix(in srgb, var(--color-error) 12%, var(--color-surface));
  border: 1px solid color-mix(in srgb, var(--color-error) 30%, transparent);
  color: var(--color-error);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
}

/* ============ RESULTS ============ */
.result-card { border: 2px solid var(--color-primary-soft); }
.result-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}
.result-head h2 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-1);
}
.result-meta {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}
.result-actions {
  display: flex;
  gap: var(--space-2);
}
.result-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.result-list li {
  padding: var(--space-3) 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: var(--text-base);
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}
.result-list li:last-child { border-bottom: none; }
.result-list .amount {
  font-family: 'Fraunces', serif;
  font-weight: 600;
  color: var(--color-primary);
  min-width: 80px;
  font-size: var(--text-lg);
  flex-shrink: 0;
}
.result-list .name {
  color: var(--color-text);
}

/* ============ FAQ ============ */
.faq-section {
  padding-top: var(--space-10);
  padding-bottom: var(--space-16);
}
.faq-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-6);
  text-align: center;
}
.faq-section details {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
}
.faq-section summary {
  cursor: pointer;
  font-weight: 600;
  font-size: var(--text-base);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text);
}
.faq-section summary::-webkit-details-marker { display: none; }
.faq-section summary::after {
  content: '+';
  font-family: 'Fraunces', serif;
  font-size: var(--text-xl);
  color: var(--color-primary);
  transition: transform 0.2s;
  margin-left: var(--space-3);
}
.faq-section details[open] summary::after { content: '−'; }
.faq-section details p {
  margin: var(--space-3) 0 0;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============ FOOTER ============ */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-6) 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}
.site-footer .dot { margin: 0 var(--space-2); }

/* ============ PRINT ============ */
@media print {
  .site-header, .site-footer, .hero, .faq-section,
  .tabs, .tab-panel, .scale-block, .btn-primary,
  .result-actions { display: none !important; }
  .card { border: none; box-shadow: none; padding: 0; }
  body { background: white; color: black; }
  .result-list li { border-bottom: 1px solid #ccc; }
  .result-list .amount { color: black; }
}

.site-footer .footer-sub {
  font-size: 12.5px;
  margin-top: 6px;
  opacity: 0.75;
}