/* ===================================
   SPRACHING DESIGN SYSTEM - BASE STYLES
   Mobile-first, Nunito-powered, game-like
   =================================== */

/* Google Fonts — Nunito
   NOTE: font stylesheet is loaded from the HTML head for better performance
   (preconnect + preload + onload pattern). Remove @import to avoid render-blocking.
*/
/* removed @import; see cards/templates/cards/base.html for font preload/link */

/* CSS Variables - Color Palette & Design Tokens */
:root {
  /* Color Palette (strict) */
  --color-background: #fafafa;
  --color-primary: #2f6fed;
  --color-primary-dark: #2563eb;
  --color-primary-gradient: linear-gradient(135deg, #2f6fed 0%, #5b4ef5 100%);
  --color-accent-error: #c40000;
  --color-accent-badge: #e3c934;
  /* Backwards-compatible alias used by pages styles */
  --color-badge: var(--color-accent-badge);
  --color-accent: #fc588a;
  --color-purple: #5b4ef5;
  --color-success: #10b981;
  --color-surface: #ffffff;
  --color-text-primary: #1f2937;
  --color-text-secondary: #6b7280;

  /* Spacing System (8px grid) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 15px rgba(0, 0, 0, 0.1);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-streak: 0 8px 32px rgba(47, 111, 237, 0.35);
  --shadow-cta: 0 6px 20px rgba(47, 111, 237, 0.4);

  /* Typography */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 30px;
  --font-size-4xl: 36px;
  --font-size-5xl: 48px;

  --line-height-tight: 1.1;
  --line-height-snug: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Layout */
  --container-max-width: 480px;
  --navbar-height: 64px;
  /* Additional neutral tokens */
  --color-muted: #f0f2f5; /* subtle surface for cards and inputs */
  --color-muted-2: #faf5ff; /* subtle purple tint */
  --color-muted-3: #f8f9ff; /* very light blue */
  --color-info-bg: #eff4ff;
  --color-amber-bg: #fffbeb;
  --color-danger-bg: #fff0f0;
  --color-success-bg: #f0fdf4;
  /* Warning / amber tones */
  --color-warning: #f59e0b;
  --color-warning-dark: #d97706;
  /* Danger dark */
  --color-accent-error-dark: #b91c1c;
}

/* ===================================
   RESET & BASE STYLES
   =================================== */

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

html {
  font-size: 16px;
  line-height: var(--line-height-normal);
  scroll-behavior: smooth;
}

body {
  font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--color-background);
  color: var(--color-text-primary);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   TYPOGRAPHY SCALE
   =================================== */

h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-lg);
  color: var(--color-text-primary);
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

h4 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  line-height: var(--line-height-normal);
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

p {
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

.text-small {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

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

/* ===================================
   LAYOUT & CONTAINERS
   =================================== */

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

.main-content {
  padding-top: calc(var(--navbar-height) + var(--space-md));
  padding-bottom: var(--space-2xl);
  min-height: 100vh;
}

.main-content--no-navbar {
  padding-top: var(--space-lg);
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (min-width: 481px) {
  .container {
    max-width: 600px;
    padding: 0 var(--space-lg);
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 760px;
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: 1200px;
  }
}

/* Small screens optimization */
@media (max-width: 380px) {
  :root {
    --space-md: 12px;
    --space-lg: 18px;
    --space-xl: 24px;
  }
}

/* ===================================
   ACCESSIBILITY IMPROVEMENTS
   =================================== */

/* Focus styles for keyboard navigation */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Legacy focus for non-focus-visible browsers */
button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 15px rgba(0, 0, 0, 0.3);
  }
}