:root {
  /* Color palette — dark/amber beer theme */
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-card: #1f2b47;
  --bg-input: #0f1626;
  --amber: #d4a017;
  --amber-light: #f0c040;
  --amber-dark: #b8860b;
  --copper: #c67f40;
  --text-primary: #e8e8e8;
  --text-secondary: #a0a8b8;
  --text-muted: #6b7280;
  --danger: #e74c3c;
  --success: #27ae60;
  --border: #2a3a5c;
  --radius: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);

  /* Typography */
  --font-body: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "SF Mono", "Fira Code", monospace;
}

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

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

#app {
  flex: 1;
}

/* ── Header ── */

.app-header {
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--amber);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  color: var(--amber);
  cursor: pointer;
  font-size: 1.6rem;
  user-select: none;
  transition: color 0.2s;
}

.logo:hover {
  color: var(--amber-light);
}

/* ── Footer ── */

.app-footer {
  text-align: center;
  padding: 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
}

/* ── Buttons ── */

.btn {
  padding: 0.55rem 1.3rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  display: inline-block;
}

.btn-primary {
  background: var(--amber);
  color: #1a1a2e;
}
.btn-primary:hover {
  background: var(--amber-light);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--amber);
  color: var(--amber);
}

.btn-danger {
  background: var(--danger);
  color: white;
}
.btn-danger:hover {
  opacity: 0.85;
}

.btn-sm {
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
}

/* ── Unit toggle ── */
.unit-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.unit-btn {
  background: none;
  border: none;
  padding: 0.25rem 0.75rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.unit-btn:hover {
  background: var(--surface);
}
.unit-btn.active {
  background: var(--amber);
  color: #fff;
  font-weight: 600;
}

/* ── Recipe card grid ── */

.recipe-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding: 2rem 0;
}

.recipe-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.recipe-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--amber);
}

.recipe-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.recipe-card .card-style {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.recipe-card .card-date {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* ── Badges ── */

.badge {
  display: inline-block;
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  vertical-align: middle;
  position: relative;
  top: -1px;
}

.badge-na {
  background: var(--success);
  color: #fff;
}

/* ── Checkbox ── */

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.checkbox-label input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--amber);
  cursor: pointer;
}

/* ── Stats bar ── */

.stats-bar {
  display: flex;
  gap: 1rem;
  margin: 1rem 0;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  min-width: 72px;
  border: 1px solid var(--border);
}

.stat-value {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--amber);
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-top: 0.15rem;
}

.srm-swatch {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--border);
  flex-shrink: 0;
}

/* ── Forms ── */

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.6rem 0.8rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-body);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--amber);
  box-shadow: 0 0 0 3px rgba(212, 160, 23, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-row {
  display: grid;
  gap: 1rem;
}

.form-row-2 {
  grid-template-columns: 1fr 1fr;
}

.form-row-4 {
  grid-template-columns: 1fr 1fr 1fr 1fr;
}

/* ── Ingredient tables ── */

.ingredient-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.5rem 0;
}

.ingredient-table th {
  text-align: left;
  padding: 0.5rem 0.4rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.ingredient-table td {
  padding: 0.35rem 0.4rem;
}

.ingredient-table input {
  width: 100%;
  padding: 0.45rem 0.6rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: var(--font-body);
}

.ingredient-table input:focus {
  outline: none;
  border-color: var(--amber);
}

.btn-remove-row {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 0.2rem 0.4rem;
  opacity: 0.6;
  transition: opacity 0.2s;
}

.btn-remove-row:hover {
  opacity: 1;
}

/* ── Detail page ── */

.recipe-detail {
  padding: 2rem 0;
}

.recipe-detail h2 {
  color: var(--amber);
  font-size: 1.8rem;
  margin-bottom: 0.3rem;
}

.recipe-meta {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.detail-section {
  margin-bottom: 2rem;
}

/* ── Yeast profile card ── */
.yeast-profile-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--copper);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  margin: 0.6rem 0 0.75rem;
}
.yeast-profile-header {
  margin-bottom: 0.6rem;
}
.yeast-brand {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--copper);
}
.yeast-profile-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.4rem 1.5rem;
  margin-bottom: 0.65rem;
}
.yeast-stat {
  display: flex;
  justify-content: space-between;
  font-size: 0.83rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.25rem;
}
.yeast-stat-label {
  color: var(--text-muted);
}
.yeast-stat-value {
  font-weight: 600;
  color: var(--text-primary);
}
.yeast-flavor {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin: 0;
  font-style: italic;
}

.detail-section h3 {
  color: var(--copper);
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
  font-size: 1rem;
}

.detail-table {
  width: 100%;
  border-collapse: collapse;
}

.detail-table th {
  text-align: left;
  padding: 0.6rem 0.8rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.detail-table td {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid rgba(42, 58, 92, 0.4);
  font-size: 0.9rem;
}

/* ── Section header for form ── */

.section-header {
  color: var(--copper);
  margin: 1.5rem 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
}

/* ── Empty state ── */

.empty-state {
  text-align: center;
  padding: 5rem 0;
}

.empty-state h2 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.empty-state p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* ── Loading ── */

.loading {
  color: var(--text-muted);
  text-align: center;
  padding: 3rem 0;
}

/* ── Action bar ── */

.action-bar {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

/* ── Brew Steps ── */

.brew-steps {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
}

.brew-step {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  transition: border-color 0.2s;
}

.brew-step:hover {
  border-color: var(--amber);
}

.brew-step-header {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.brew-step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--amber);
  color: var(--bg-primary);
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

.brew-step-title {
  display: flex;
  flex-direction: column;
}

.brew-step-title strong {
  font-size: 0.95rem;
}

.brew-step-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}

.brew-step-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
  white-space: pre-wrap;
  margin-left: 2.5rem;
}

/* ── Login ── */

.login-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 60vh;
  padding: 2rem 0;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 380px;
  text-align: center;
  box-shadow: var(--shadow);
}

.login-logo {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.login-card h2 {
  color: var(--amber);
  margin-bottom: 0.25rem;
  font-size: 1.4rem;
}

.login-subtitle {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
}

.login-card .form-group {
  text-align: left;
}

.login-error {
  background: rgba(231, 76, 60, 0.12);
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  text-align: center;
}

/* ── Responsive ── */

@media (max-width: 768px) {
  .form-row-4 {
    grid-template-columns: 1fr 1fr;
  }

  .recipe-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .stats-bar {
    gap: 0.5rem;
  }

  .stat {
    min-width: 60px;
    padding: 0.5rem 0.6rem;
  }

  .stat-value {
    font-size: 1.1rem;
  }

  .recipe-grid {
    grid-template-columns: 1fr;
  }

  .form-row-2,
  .form-row-4 {
    grid-template-columns: 1fr;
  }

  .recipe-detail h2 {
    font-size: 1.4rem;
  }
}