@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=DM+Sans:wght@400;500;600;700&display=swap');

/* ═══ CSS Variables (Design Tokens) ═══ */
:root {
  --bg: hsl(30, 20%, 98%);
  --fg: hsl(220, 15%, 18%);
  --card: hsl(0, 0%, 100%);
  --card-fg: hsl(220, 15%, 18%);
  --primary: hsl(145, 40%, 38%);
  --primary-fg: hsl(0, 0%, 100%);
  --secondary: hsl(145, 15%, 93%);
  --secondary-fg: hsl(220, 15%, 25%);
  --muted: hsl(220, 10%, 94%);
  --muted-fg: hsl(220, 10%, 45%);
  --accent: hsl(145, 30%, 90%);
  --accent-fg: hsl(145, 40%, 25%);
  --destructive: hsl(0, 70%, 50%);
  --border: hsl(220, 10%, 88%);
  --input: hsl(220, 10%, 88%);
  --ring: hsl(145, 40%, 38%);
  --radius: 0.75rem;
}

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

body {
  font-family: 'Inter', 'DM Sans', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'DM Sans', 'Inter', system-ui, sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

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

/* ═══ Layout ═══ */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* ═══ Header ═══ */
.header {
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.header-logo {
  width: 2.25rem; height: 2.25rem;
  border-radius: 50%;
  background: var(--primary);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary-fg);
  font-family: 'DM Sans', sans-serif;
  font-weight: 700; font-size: 1.125rem;
}
.header-title { font-size: 1.25rem; color: var(--fg); }
.header-subtitle { font-size: 0.875rem; color: var(--muted-fg); }
.header-nav { margin-left: auto; display: flex; gap: 0.5rem; }

/* ═══ Buttons ═══ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem; font-weight: 500;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--fg);
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}
.btn:hover { border-color: var(--primary); background: var(--accent); }
.btn-primary {
  background: var(--primary);
  color: var(--primary-fg);
  border-color: var(--primary);
}
.btn-primary:hover { opacity: 0.9; }
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8125rem; }
.btn-ghost { border: none; background: transparent; }
.btn-ghost:hover { background: var(--muted); }
.btn.active {
  background: var(--primary);
  color: var(--primary-fg);
  border-color: var(--primary);
}

/* ═══ Cards ═══ */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.card-header { padding: 1.25rem 1.5rem 0.5rem; }
.card-title {
  font-size: 0.875rem;
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  color: var(--fg);
}
.card-description { font-size: 0.875rem; color: var(--muted-fg); margin-top: 0.25rem; }
.card-content { padding: 0.5rem 1.5rem 1.25rem; }

/* ═══ Template Grid ═══ */
.template-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.template-card {
  cursor: pointer;
  transition: all 0.2s ease;
}
.template-card:hover {
  border-color: hsla(145, 40%, 38%, 0.5);
  box-shadow: 0 4px 12px hsla(145, 40%, 38%, 0.1);
}
.template-icon { font-size: 1.875rem; }
.template-name {
  font-size: 0.875rem;
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  color: var(--fg);
}
.template-meta {
  display: flex; gap: 0.5rem;
  font-size: 0.75rem; color: var(--muted-fg);
  margin-top: 0.25rem;
}
.template-desc { font-size: 0.875rem; color: var(--muted-fg); margin-top: 0.25rem; }
.template-footer {
  display: flex; gap: 0.75rem;
  font-size: 0.75rem; color: var(--muted-fg);
  padding-top: 0;
}

/* ═══ Filters ═══ */
.filter-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.75rem; }
.filter-label {
  font-size: 0.875rem; color: var(--muted-fg);
  align-self: center; margin-right: 0.25rem;
}

/* ═══ Input ═══ */
.input {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--input);
  border-radius: var(--radius);
  font-size: 0.875rem;
  background: var(--card);
  color: var(--fg);
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}
.input:focus { border-color: var(--ring); box-shadow: 0 0 0 2px hsla(145, 40%, 38%, 0.15); }

/* ═══ Badges ═══ */
.badge {
  display: inline-flex; align-items: center;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.75rem; font-weight: 500;
  background: var(--secondary);
  color: var(--secondary-fg);
}

/* ═══ Info Grid (Stats) ═══ */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.75rem;
}
.info-box {
  text-align: center;
  padding: 0.75rem;
  border-radius: var(--radius);
  background: var(--secondary);
}
.info-value {
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  color: var(--fg);
}
.info-label { font-size: 0.75rem; color: var(--muted-fg); }

/* ═══ Hero ═══ */
.hero { text-align: center; padding: 2rem 0; }
.hero h2 { font-size: 1.875rem; color: var(--fg); margin-bottom: 0.75rem; }
.hero p { color: var(--muted-fg); max-width: 42rem; margin: 0 auto; }

/* ═══ Slider ═══ */
.slider-group { margin-bottom: 1.25rem; }
.slider-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; }
.slider-label { font-size: 0.875rem; font-weight: 500; color: var(--fg); }
.slider-value { font-size: 0.875rem; font-family: 'DM Sans', sans-serif; font-weight: 700; color: var(--fg); }
.slider-hint { font-size: 0.75rem; color: var(--muted-fg); margin-top: 0.25rem; }
input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
  height: 6px;
}

/* ═══ Presets Grid ═══ */
.preset-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 0.75rem; }
.preset-btn {
  text-align: left; padding: 0.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}
.preset-btn:hover { border-color: hsla(145, 40%, 38%, 0.5); }
.preset-btn.active { border-color: var(--primary); background: hsla(145, 40%, 38%, 0.1); box-shadow: 0 0 0 1px var(--primary); }
.preset-name { font-family: 'DM Sans', sans-serif; font-weight: 700; font-size: 0.875rem; color: var(--fg); }
.preset-desc { font-size: 0.75rem; color: var(--muted-fg); margin-top: 0.125rem; }

/* ═══ Progress Bar ═══ */
.progress-bar {
  width: 100%; height: 8px;
  border-radius: 4px;
  background: var(--muted);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 4px;
  transition: width 0.4s ease;
}

/* ═══ Results Stats ═══ */
.stat-box {
  text-align: center; padding: 0.75rem;
  border-radius: var(--radius);
  background: var(--accent);
}
.stat-value { font-size: 1.5rem; font-family: 'DM Sans', sans-serif; font-weight: 700; color: var(--fg); }
.stat-label { font-size: 0.75rem; color: var(--muted-fg); }

/* ═══ Separator ═══ */
.separator { border: none; border-top: 1px solid var(--border); margin: 1rem 0; }

/* ═══ Flex / Grid Utilities ═══ */
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-center { text-align: center; }
.text-muted { color: var(--muted-fg); }
.font-heading { font-family: 'DM Sans', sans-serif; font-weight: 700; }
.space-y-6 > * + * { margin-top: 1.5rem; }
.hidden { display: none; }

/* ═══ Responsive ═══ */
@media (max-width: 768px) {
  .template-grid { grid-template-columns: 1fr 1fr; }
  .preset-grid { grid-template-columns: 1fr 1fr; }
  .info-grid { grid-template-columns: 1fr 1fr 1fr; }
  .header { flex-wrap: wrap; }
}
@media (max-width: 480px) {
  .template-grid { grid-template-columns: 1fr; }
  .preset-grid { grid-template-columns: 1fr; }
}