/* ======================================================
   TrainerBjorn CSS Framework
   Fase 2 – Structuur & Stijl
   ====================================================== */

/* =====================
   1. Design Tokens
   ===================== */

:root {
  --color-bg-main: #f7f8f9;
  --color-bg-alt: #ffffff;
  --color-bg-soft: #eef1f3;

  --color-text-main: #1f2933;
  --color-text-muted: #6b7280;

  --color-accent-primary: #0ea5a4;
  --color-accent-secondary: #f59e0b;
  --color-accent-soft: #d1faf5;

  --color-border-light: #e5e7eb;
  --color-border-accent: rgba(14, 165, 164, 0.4);

  --font-base: 'Inter', 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, monospace;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 32px;
  --space-xl: 64px;

  --radius-sm: 4px;
  --radius-md: 8px;

  --shadow-soft: 0 4px 16px rgba(0, 0, 0, 0.06);

  --transition-fast: 0.15s ease-out;
  --transition-base: 0.25s ease-out;
}

/* =====================
   2. Reset & Base
   ===================== */

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

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text-main);
  background-color: var(--color-bg-main);
  line-height: 1.6;
}

/* =====================
   3. Header & Navigatie
   ===================== */

header {
  background-color: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border-light);
}

.nav {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-title {
  font-weight: 600;
  text-decoration: none;
  color: var(--color-text-main);
}

.nav-links {
  display: flex;
  gap: var(--space-md);
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--color-accent-primary);
}

/* =====================
   4. Layout
   ===================== */

main {
  display: block;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
}

.section {
  padding: var(--space-xl) 0;
}

.section--soft {
  background-color: var(--color-bg-soft);
}

/* =====================
   5. Typography
   ===================== */

h1, h2, h3 {
  font-weight: 600;
  line-height: 1.3;
  margin-top: 0;
}

h1 {
  font-size: 2.2rem;
}

h2 {
  font-size: 1.7rem;
  margin-bottom: var(--space-md);
}

h3 {
  font-size: 1.3rem;
}

p {
  margin-bottom: var(--space-md);
}

.text-muted {
  color: var(--color-text-muted);
}

.code-inline {
  font-family: var(--font-mono);
  background-color: var(--color-bg-soft);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* =====================
   6. Buttons
   ===================== */

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 500;
  transition: background-color var(--transition-base),
              transform var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-accent-primary);
  color: #ffffff;
}

.btn-primary:hover {
  transform: translateY(-1px);
  background-color: #0d9488;
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-border-accent);
  color: var(--color-accent-primary);
}

/* =====================
   7. Cards
   ===================== */

.card {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--color-border-light);
}

.card + .card {
  margin-top: var(--space-md);
}

/* =====================
   8. Tables
   ===================== */

.table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-bg-alt);
}

.table th,
.table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
  text-align: left;
}

.table th {
  background-color: var(--color-bg-soft);
  font-weight: 600;
}

/* =====================
   9. Micro animations
   ===================== */

.fade-in {
  animation: fadeIn 0.4s ease-out both;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}