/**
 * ARTIFY ACADEMY THEME
 * Based on Todoist Design System
 * Light theme with warm paper aesthetic
 *
 * @author Design System
 * @version 1.0
 */

/* ============================================================
   ROOT DESIGN TOKENS
   ============================================================ */
:root {
  /* ---- Color Palette ---- */
  /* Primary Text & Surfaces */
  --color-ink: #25221e;
  --color-paper: #fefdfc;
  --color-cream: #fff6f0;
  --color-stone: #d7d6d4;
  --color-pencil: #6f6c69;
  --color-graphite: #94928f;
  --color-charcoal: #4a4744;

  /* Brand Accents */
  --color-ember-red: #e34432;
  --color-deep-ember: #cf3520;
  --color-cobalt-link: #0f66ae;
  --color-teal-dusk: #497d7e;

  /* Background Washes */
  --color-mint-wash: #f0f6df;
  --color-sky-wash: #dceaff;
  --color-forest: #446c3d;

  /* Surface Layers */
  --surface-paper-canvas: #fefdfc;
  --surface-cream-wash: #fff6f0;
  --surface-tinted-wave: #f0f6df;
  --surface-card-surface: #fefdfc;

  /* ---- Typography ---- */
  /* Font Families */
  --font-graphik: 'Graphik', 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-inter: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-caecilia: 'Caecilia', 'Lora', 'Source Serif Pro', serif;
  --font-shantell-sans: 'Shantell Sans', 'Caveat', 'Kalam', cursive;

  /* Typography Scale */
  --text-caption: 12px;
  --leading-caption: 1.5;
  --tracking-caption: 0.14px;

  --text-body-sm: 14px;
  --leading-body-sm: 1.5;
  --tracking-body-sm: 0.07px;

  --text-body: 16px;
  --leading-body: 1.5;
  --tracking-body: 0.16px;

  --text-body-lg: 18px;
  --leading-body-lg: 1.5;
  --tracking-body-lg: 0.18px;

  --text-subheading: 21px;
  --leading-subheading: 1.5;
  --tracking-subheading: 0.21px;

  --text-heading: 38px;
  --leading-heading: 1.28;
  --tracking-heading: -0.19px;

  --text-heading-lg: 44px;
  --leading-heading-lg: 1.15;
  --tracking-heading-lg: -0.22px;

  --text-display: 55px;
  --leading-display: 1;
  --tracking-display: -0.55px;

  /* Font Weights */
  --font-weight-regular: 400;
  --font-weight-w475: 475;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-w625: 625;
  --font-weight-bold: 700;

  /* ---- Spacing Scale (4px unit) ---- */
  --spacing-unit: 4px;
  --spacing-4: 4px;
  --spacing-8: 8px;
  --spacing-12: 12px;
  --spacing-16: 16px;
  --spacing-20: 20px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-48: 48px;
  --spacing-64: 64px;
  --spacing-128: 128px;
  --spacing-192: 192px;

  /* ---- Border Radius ---- */
  --radius-sm: 2.5px;
  --radius-lg: 8px;
  --radius-xl: 15px;

  /* Semantic Radius Names */
  --radius-nav: 8px;
  --radius-cards: 8px;
  --radius-badges: 8px;
  --radius-images: 15px;
  --radius-inputs: 8px;
  --radius-buttons: 8px;

  /* ---- Shadows ---- */
  /* Subtle hairline shadow for cards */
  --shadow-subtle: rgba(37, 34, 30, 0.04) 0px 1px 0px 0px;

  /* Large shadow for primary buttons */
  --shadow-lg: rgba(37, 34, 30, 0.07) 0px 14px 19px -9px, rgba(37, 34, 30, 0.18) 0px 10px 48px 0px;

  /* ---- Layout ---- */
  --page-max-width: 1200px;
  --section-gap: 48px;
  --card-padding: 16px;
  --element-gap: 16px;

  /* ---- Transitions ---- */
  --transition-fast: 150ms ease-out;
  --transition-normal: 250ms ease-out;
  --transition-slow: 350ms ease-out;
}

/* ============================================================
   GLOBAL RESETS & DEFAULTS
   ============================================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  background-color: var(--surface-paper-canvas);
  color: var(--color-ink);
  font-family: var(--font-inter);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);
  font-weight: var(--font-weight-regular);
}

/* ============================================================
   TYPOGRAPHY COMPONENTS
   ============================================================ */

/* Display Heading (55px) */
h1, .display {
  font-family: var(--font-graphik);
  font-size: var(--text-display);
  font-weight: var(--font-weight-bold);
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-display);
  color: var(--color-ink);
  margin-bottom: var(--spacing-16);
}

/* Large Heading (44px) */
h2, .heading-lg {
  font-family: var(--font-graphik);
  font-size: var(--text-heading-lg);
  font-weight: var(--font-weight-bold);
  line-height: var(--leading-heading-lg);
  letter-spacing: var(--tracking-heading-lg);
  color: var(--color-ink);
  margin-bottom: var(--spacing-16);
}

/* Heading (38px) */
h3, .heading {
  font-family: var(--font-graphik);
  font-size: var(--text-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin-bottom: var(--spacing-12);
}

/* Subheading (21px) */
h4, .subheading {
  font-family: var(--font-graphik);
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-subheading);
  letter-spacing: var(--tracking-subheading);
  color: var(--color-ink);
  margin-bottom: var(--spacing-12);
}

/* Body Large (18px) */
.body-lg, h5 {
  font-family: var(--font-inter);
  font-size: var(--text-body-lg);
  font-weight: var(--font-weight-regular);
  line-height: var(--leading-body-lg);
  letter-spacing: var(--tracking-body-lg);
  color: var(--color-ink);
}

/* Body (16px) */
p, .body {
  font-family: var(--font-inter);
  font-size: var(--text-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);
  color: var(--color-ink);
  margin-bottom: var(--spacing-16);
}

/* Body Small (14px) */
.body-sm, h6 {
  font-family: var(--font-inter);
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-regular);
  line-height: var(--leading-body-sm);
  letter-spacing: var(--tracking-body-sm);
  color: var(--color-ink);
}

/* Caption (12px) */
.caption {
  font-family: var(--font-inter);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-medium);
  line-height: var(--leading-caption);
  letter-spacing: var(--tracking-caption);
  color: var(--color-graphite);
}

/* Secondary Text */
.text-secondary {
  color: var(--color-pencil);
  font-size: var(--text-body-sm);
}

/* Muted Text */
.text-muted {
  color: var(--color-graphite);
}

/* ============================================================
   BUTTONS & ACTIONS
   ============================================================ */

/* Primary Button - Single CTA per view */
.btn-primary,
button[type="submit"],
input[type="submit"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-8);

  background-color: var(--color-ember-red);
  color: var(--color-paper);

  font-family: var(--font-inter);
  font-size: var(--text-body);
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);

  padding: var(--spacing-12) var(--spacing-24);
  border: none;
  border-radius: var(--radius-buttons);

  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
}

.btn-primary:hover,
button[type="submit"]:hover,
input[type="submit"]:hover {
  background-color: var(--color-deep-ember);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:active,
button[type="submit"]:active,
input[type="submit"]:active {
  background-color: var(--color-charcoal);
  transform: translateY(0);
}

/* Ghost Button - Secondary action */
.btn-ghost,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-8);

  background-color: transparent;
  color: var(--color-ink);

  font-family: var(--font-inter);
  font-size: var(--text-body);
  font-weight: var(--font-weight-medium);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);

  padding: var(--spacing-8) var(--spacing-16);
  border: 1px solid transparent;
  border-radius: var(--radius-buttons);

  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.btn-ghost:hover,
.btn-secondary:hover {
  color: var(--color-deep-ember);
  background-color: rgba(227, 68, 50, 0.05);
}

.btn-ghost:focus,
.btn-secondary:focus {
  border-color: var(--color-deep-ember);
  outline: none;
}

/* Text Link */
a, .link {
  color: var(--color-cobalt-link);
  text-decoration: none;
  transition: color var(--transition-normal);
  font-weight: var(--font-weight-medium);
}

a:hover, .link:hover {
  color: var(--color-deep-ember);
  text-decoration: underline;
}

a:focus, .link:focus {
  outline: 2px solid var(--color-cobalt-link);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ============================================================
   CARDS & CONTAINERS
   ============================================================ */

.card {
  background-color: var(--surface-card-surface);
  border-radius: var(--radius-cards);
  padding: var(--card-padding);
  box-shadow: var(--shadow-subtle);
  transition: box-shadow var(--transition-normal);
  border: 1px solid var(--color-stone);
}

.card:hover {
  box-shadow: 0px 4px 12px rgba(37, 34, 30, 0.08);
}

/* ============================================================
   FORMS & INPUTS
   ============================================================ */

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="number"],
input[type="tel"],
input[type="date"],
textarea,
select {
  width: 100%;
  padding: var(--spacing-12) var(--spacing-16);
  font-family: var(--font-inter);
  font-size: var(--text-body);
  line-height: var(--leading-body);

  background-color: var(--surface-paper-canvas);
  color: var(--color-ink);
  border: 1px solid var(--color-stone);
  border-radius: var(--radius-inputs);

  transition: border-color var(--transition-normal);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-graphite);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-deep-ember);
  background-color: #fff;
  box-shadow: 0 0 0 3px rgba(207, 53, 32, 0.1);
}

input:disabled,
textarea:disabled,
select:disabled {
  background-color: var(--color-grey2);
  color: var(--color-graphite);
  cursor: not-allowed;
}

/* ============================================================
   BADGES & LABELS
   ============================================================ */

.badge {
  display: inline-block;
  font-family: var(--font-inter);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-caption);
  letter-spacing: var(--tracking-caption);

  padding: var(--spacing-4) var(--spacing-10);
  border-radius: var(--radius-badges);

  white-space: nowrap;
}

/* Badge Variants */
.badge-success {
  background-color: var(--color-mint-wash);
  color: var(--color-forest);
}

.badge-info {
  background-color: var(--color-sky-wash);
  color: var(--color-cobalt-link);
}

.badge-warning {
  background-color: rgba(227, 68, 50, 0.1);
  color: var(--color-deep-ember);
}

/* ============================================================
   EYEBROW LABEL
   ============================================================ */

.eyebrow {
  font-family: var(--font-inter);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-caption);
  letter-spacing: var(--tracking-caption);
  color: var(--color-deep-ember);
  text-transform: uppercase;
  margin-bottom: var(--spacing-8);
  display: block;
}

/* ============================================================
   NAVIGATION
   ============================================================ */

nav {
  font-family: var(--font-inter);
  font-size: var(--text-body);
  font-weight: var(--font-weight-medium);
}

nav a {
  display: inline-block;
  padding: var(--spacing-8) var(--spacing-16);
  color: var(--color-ink);
  transition: color var(--transition-normal);
  position: relative;
}

nav a:hover {
  color: var(--color-deep-ember);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--spacing-16);
  right: var(--spacing-16);
  height: 2px;
  background-color: var(--color-deep-ember);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

nav a:hover::after,
nav a.active::after {
  transform: scaleX(1);
}

/* ============================================================
   SECTIONS & SPACING
   ============================================================ */

section {
  padding: var(--spacing-64) var(--spacing-20);
}

section:nth-child(even) {
  background-color: var(--surface-cream-wash);
}

section:nth-child(3n) {
  background-color: var(--surface-tinted-wave);
}

.container {
  width: 100%;
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-20);
}

/* ============================================================
   UTILITIES
   ============================================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-4); }
.mt-2 { margin-top: var(--spacing-8); }
.mt-3 { margin-top: var(--spacing-12); }
.mt-4 { margin-top: var(--spacing-16); }
.mt-5 { margin-top: var(--spacing-24); }
.mt-6 { margin-top: var(--spacing-32); }

.mb-1 { margin-bottom: var(--spacing-4); }
.mb-2 { margin-bottom: var(--spacing-8); }
.mb-3 { margin-bottom: var(--spacing-12); }
.mb-4 { margin-bottom: var(--spacing-16); }
.mb-5 { margin-bottom: var(--spacing-24); }
.mb-6 { margin-bottom: var(--spacing-32); }

.p-1 { padding: var(--spacing-4); }
.p-2 { padding: var(--spacing-8); }
.p-3 { padding: var(--spacing-12); }
.p-4 { padding: var(--spacing-16); }
.p-5 { padding: var(--spacing-24); }
.p-6 { padding: var(--spacing-32); }

.gap-1 { gap: var(--spacing-4); }
.gap-2 { gap: var(--spacing-8); }
.gap-3 { gap: var(--spacing-12); }
.gap-4 { gap: var(--spacing-16); }
.gap-5 { gap: var(--spacing-24); }

/* ============================================================
   RESPONSIVE HELPERS
   ============================================================ */

.hide-mobile {
  display: none;
}

@media (min-width: 768px) {
  .hide-mobile {
    display: block;
  }

  .hide-desktop {
    display: none;
  }

  section {
    padding: var(--spacing-80) var(--spacing-32);
  }
}

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

/* Skip link */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-deep-ember);
  color: var(--color-paper);
  padding: var(--spacing-8) var(--spacing-16);
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.skip-to-content:focus {
  top: 0;
}

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--color-cobalt-link);
  outline-offset: 2px;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-deep-ember);
  outline-offset: 2px;
}

/* ============================================================
   HOMEPAGE HERO — warm theme background + effects (global)
   ============================================================ */
/* Hero (.af-hero*) styles moved to app.css, scoped under .page-index */

/* ============================================================
   MODERN BADGE (NEW THEME GLOBAL OVERRIDE)
   ============================================================ */
.modern-badge {
  display: inline-flex !important;
  align-items: center !important;
  font-family: var(--font-inter) !important;
  font-size: 11px !important;
  font-weight: var(--font-weight-semibold) !important;
  letter-spacing: 0.08em !important;
  padding: 6px 12px !important;
  border-radius: var(--radius-badges, 8px) !important;
  background-color: var(--color-cream, #fff6f0) !important;
  color: var(--color-deep-ember, #cf3520) !important;
  border: 1px solid var(--color-stone, #d7d6d4) !important;
  text-transform: uppercase !important;
  box-shadow: var(--shadow-subtle) !important;
}