/* ============================================================
   PRAMEN – main.css
   Zdroj: DESIGN_SYSTEM.md
   ============================================================ */

/* ---------------------------------------------------------------
   CSS VARIABLES – design tokens
--------------------------------------------------------------- */
:root {
  /* Primary green */
  --primary-50:  #f0fdf4;
  --primary-100: #dcfce7;
  --primary-200: #bbf7d0;
  --primary-300: #86efac;
  --primary-400: #4ade80;
  --primary-500: #22c55e;
  --primary-600: #16a34a;
  --primary-700: #15803d;
  --primary-800: #166534;
  --primary-900: #14532d;

  /* Secondary blue */
  --secondary-500: #3b82f6;
  --secondary-600: #2563eb;
  --secondary-700: #1d4ed8;

  /* Neutrals */
  --gray-50:  #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Sémantické tokeny */
  --color-text:        var(--gray-900);
  --color-text-muted:  var(--gray-500);
  --color-bg:          #ffffff;
  --color-bg-subtle:   var(--gray-50);
  --color-border:      var(--gray-200);
  --color-primary:     var(--primary-600);
  --color-primary-hover: var(--primary-700);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Typografie */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-sm:   0.875rem;
  --font-size-base: 1rem;
  --font-size-lg:   1.125rem;
  --font-size-xl:   1.25rem;
  --font-size-2xl:  1.5rem;
  --font-size-3xl:  1.875rem;
  --font-size-4xl:  2.25rem;

  /* Border radius */
  --radius-sm: 0.25rem;
  --radius:    0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow:    0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

/* ---------------------------------------------------------------
   RESET & BASE
--------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

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

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------------------------------------------------------------
   LAYOUT
--------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  flex: 1;
}

/* Grid systém */
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---------------------------------------------------------------
   NAVBAR
--------------------------------------------------------------- */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-brand {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-6);
  align-items: center;
}

.nav-links a {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--color-text); text-decoration: none; }

/* ---------------------------------------------------------------
   FOOTER
--------------------------------------------------------------- */
.footer {
  padding: var(--space-8) var(--space-6);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  border-top: 1px solid var(--color-border);
}

/* ---------------------------------------------------------------
   CARD
--------------------------------------------------------------- */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.card-body { padding: var(--space-4); }
.card-body h3 { font-size: var(--font-size-lg); margin-bottom: var(--space-2); }

/* ---------------------------------------------------------------
   BUTTONS
--------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: background 0.15s, transform 0.1s;
  text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-secondary {
  background: var(--gray-100);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: var(--gray-200); }

/* ---------------------------------------------------------------
   BADGE
--------------------------------------------------------------- */
.badge {
  display: inline-block;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--primary-100);
  color: var(--primary-800);
}

/* ---------------------------------------------------------------
   MESSAGES (Django flash messages)
--------------------------------------------------------------- */
.messages { margin-bottom: var(--space-4); }
.message {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
}
.message-success { background: var(--primary-50); color: var(--primary-800); border: 1px solid var(--primary-200); }
.message-error   { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.message-warning { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.message-info    { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }

/* ---------------------------------------------------------------
   FORMS
--------------------------------------------------------------- */
.form-group { margin-bottom: var(--space-4); }
.form-group label { display: block; font-size: var(--font-size-sm); font-weight: 500; margin-bottom: var(--space-1); }
.form-control, .form-select {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: var(--font-size-base);
  background: var(--color-bg);
  transition: border-color 0.15s;
}
.form-control:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--primary-100);
}
.field-errors { color: #dc2626; font-size: var(--font-size-sm); margin-top: var(--space-1); }
.filter-form { display: flex; gap: var(--space-3); margin-bottom: var(--space-6); flex-wrap: wrap; }
.filter-form .form-control, .filter-form .form-select { flex: 1; min-width: 180px; }

/* ---------------------------------------------------------------
   TABLE
--------------------------------------------------------------- */
.table { width: 100%; border-collapse: collapse; font-size: var(--font-size-sm); }
.table th, .table td { padding: var(--space-3) var(--space-4); text-align: left; border-bottom: 1px solid var(--color-border); }
.table th { background: var(--gray-50); font-weight: 600; color: var(--gray-700); }
.table tr:hover td { background: var(--gray-50); }

/* ---------------------------------------------------------------
   HERO
--------------------------------------------------------------- */
.hero {
  padding: var(--space-16) 0;
  text-align: center;
}
.hero h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
  color: var(--gray-900);
}
.hero p {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------------------------------------------------------------
   PROFILE SCORE
--------------------------------------------------------------- */
.profile-score {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-8);
  background: var(--primary-50);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-8);
}
.score-value {
  font-size: 4rem;
  font-weight: 800;
  color: var(--primary-700);
  line-height: 1;
}
.score-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-1);
}

/* ---------------------------------------------------------------
   SCORE BAR
--------------------------------------------------------------- */
.aspects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: var(--space-4); }
.aspect-card {
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.score-bar {
  height: 6px;
  background: var(--gray-200);
  border-radius: 999px;
  margin: var(--space-2) 0;
  overflow: hidden;
}
.score-fill {
  height: 100%;
  background: var(--primary-500);
  border-radius: 999px;
  transition: width 0.4s ease;
}

/* ---------------------------------------------------------------
   PAGINATION
--------------------------------------------------------------- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-8);
  font-size: var(--font-size-sm);
}

/* ---------------------------------------------------------------
   AUTH FORM
--------------------------------------------------------------- */
.auth-form {
  max-width: 420px;
  margin: var(--space-16) auto;
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

/* ---------------------------------------------------------------
   SAFETY BADGES (catalog)
--------------------------------------------------------------- */
.safety-safe           { background: #dcfce7; color: #166534; }
.safety-generally_safe { background: #dbeafe; color: #1e40af; }
.safety-caution        { background: #fef9c3; color: #854d0e; }
.safety-prescription_only { background: #fee2e2; color: #991b1b; }

/* ---------------------------------------------------------------
   BIOCHEM interpretation row colors
--------------------------------------------------------------- */
.interpretation-optimal td { background: #f0fdf4; }
.interpretation-low     td { background: #eff6ff; }
.interpretation-high    td { background: #fff7ed; }
.interpretation-critical td { background: #fef2f2; }

/* ---------------------------------------------------------------
   SECTION HEADER
--------------------------------------------------------------- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

/* ---------------------------------------------------------------
   DETAIL PAGE
--------------------------------------------------------------- */
.detail-header {
  display: flex;
  gap: var(--space-8);
  align-items: flex-start;
  margin-bottom: var(--space-8);
}
.detail-image { max-width: 300px; border-radius: var(--radius-lg); }

/* ---------------------------------------------------------------
   PROFILE HEADER
--------------------------------------------------------------- */
.profile-header {
  display: flex;
  gap: var(--space-6);
  align-items: center;
  margin-bottom: var(--space-8);
}
.avatar { width: 80px; height: 80px; border-radius: 50%; object-fit: cover; }