/* ========================================
   BayZubaan Unified Exercise Layout
   Overrides per-exercise CSS for consistency
   ======================================== */

/* ---- 1. Global resets ---- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bay-canvas, #f0f4f8);
  color: var(--bay-text, #1e293b);
  line-height: 1.6;
  font-size: 16px;
  margin: 0;
  padding-bottom: 2rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body {
    font-weight: 500;
  }
}
:root[data-theme="dark"] body {
  font-weight: 500;
}

/* Urdu typography */
[lang="ur"], .urdu, .ur {
  line-height: 1.8;
  letter-spacing: 0.03em;
}

/* ---- 2. Header unification ---- */
header, .chapter-header {
  background: var(--bay-card, #ffffff) !important;
  color: var(--bay-text, #1e293b) !important;
  border-bottom: 1px solid var(--bay-border, #e2e8f0);
  padding: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--bay-shadow, 0 4px 6px -1px rgba(0,0,0,0.05));
  text-align: left;
}

header .header-content,
.chapter-header .header-content {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.chapter-header h1,
.chapter-header .chapter-title,
header h1 {
  font-size: 1.5rem;
  margin: 0;
  color: var(--bay-text, #1e293b);
}

.chapter-header p,
.chapter-header .chapter-subtitle,
header p {
  opacity: 1;
  color: var(--bay-text-light, #64748b);
  font-size: 0.95rem;
  margin: 0.25rem 0 0;
}

.chapter-badge {
  display: inline-block;
  background: var(--bay-success-bg, #dcfce7);
  color: var(--bay-success, #166534);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--bay-primary, #2d5a27);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.exercise-indicator {
  background: var(--bay-primary, #2d5a27);
  color: #fff;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* ---- 3. Navigation unification ---- */
.nav-bar, .chapter-nav {
  background: var(--bay-card, #ffffff);
  border-bottom: 1px solid var(--bay-border, #e2e8f0);
  padding: 0.75rem 1rem;
}

.nav-content, .chapter-nav {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.nav-btn, .chapter-nav a, .chapter-nav button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 1rem;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  border: 1px solid var(--bay-border, #e2e8f0);
  background: var(--bay-card, #ffffff);
  color: var(--bay-text, #1e293b);
  cursor: pointer;
}

.nav-btn:hover, .chapter-nav a:hover, .chapter-nav button:hover {
  transform: translateY(-1px);
  box-shadow: var(--bay-shadow, 0 4px 6px -1px rgba(0,0,0,0.05));
  background: var(--bay-canvas, #f0f4f8);
}

.nav-btn.disabled, .chapter-nav a.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ---- 4. Buttons ---- */
.btn, button.btn, a.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.6rem 1.1rem;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  text-decoration: none;
}

.btn:hover, button.btn:hover, a.btn:hover {
  transform: translateY(-1px);
}

.btn-primary, .btn.btn-primary {
  background: linear-gradient(135deg, var(--bay-accent, #f59e0b) 0%, var(--bay-accent-light, #fbbf24) 100%);
  color: #1a1a1a;
  box-shadow: var(--bay-shadow, 0 4px 6px -1px rgba(0,0,0,0.05));
}

.btn-secondary, .btn.btn-secondary {
  background: var(--bay-card, #ffffff);
  color: var(--bay-text, #1e293b);
  border: 1px solid var(--bay-border, #e2e8f0);
}

/* ---- 5. Main content wrapper ---- */
main, #main-content {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

main h1, #main-content h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  color: var(--bay-text, #1e293b);
}

.subtitle {
  color: var(--bay-text-light, #64748b);
  font-size: 1rem;
  margin-bottom: 1.25rem;
}

/* ---- 6. Progress container ---- */
.progress-container {
  background: var(--bay-card, #ffffff);
  border: 1px solid var(--bay-border, #e2e8f0);
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--bay-shadow, 0 4px 6px -1px rgba(0,0,0,0.05));
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.progress-bar {
  width: 100%;
  height: 10px;
  background: var(--bay-border, #e2e8f0);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--bay-primary, #2d5a27) 0%, var(--bay-primary-light, #3d7a37) 100%);
  width: 0%;
  transition: width 0.4s ease;
}

/* Nav text progress labels should not look like bars */
.chapter-nav .progress-bar,
.nav-bar .progress-bar,
.nav-content .progress-bar {
  height: auto;
  background: transparent;
  border-radius: 0;
  overflow: visible;
  font-size: 0.875rem;
  color: var(--bay-text-light, #64748b);
  font-weight: 500;
}

/* ---- 7. Sections (accordions) ---- */
.section {
  background: var(--bay-card, #ffffff);
  border: 1px solid var(--bay-border, #e2e8f0);
  border-radius: 12px;
  margin-bottom: 1rem;
  overflow: hidden;
  box-shadow: var(--bay-shadow, 0 4px 6px -1px rgba(0,0,0,0.05));
}

.section-header {
  width: 100%;
  background: var(--bay-canvas, #f0f4f8);
  border: none;
  padding: 1rem;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--bay-text, #1e293b);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s ease;
}

.section-header:hover {
  background: #e2e8f0;
}

.section-content {
  padding: 1rem;
  display: none;
}

.section-content[aria-hidden="false"],
.section-header[aria-expanded="true"] + .section-content,
.section-header[aria-expanded="true"] + #intro-content,
.section-header[aria-expanded="true"] + #spelling-content,
.section-header[aria-expanded="true"] + div[id$="-content"] {
  display: block;
}

/* ---- 8. Example cards ---- */
.german-example, .example-box, .example {
  background: var(--bay-card, #ffffff);
  border: 1px solid var(--bay-border, #e2e8f0);
  border-left: 4px solid var(--bay-accent, #f59e0b);
  border-radius: 12px;
  padding: 1rem;
  margin: 1rem 0;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: var(--bay-shadow, 0 4px 6px -1px rgba(0,0,0,0.05));
}

.german-example:hover, .example-box:hover, .example:hover {
  transform: translateY(-2px);
  box-shadow: var(--bay-shadow-lg, 0 10px 15px -3px rgba(0,0,0,0.08));
}

.translation {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--bay-border, #e2e8f0);
  color: var(--bay-text-light, #64748b);
  font-size: 0.95rem;
}

/* ---- 9. Form elements ---- */
input[type="text"],
input[type="email"],
input[type="password"],
textarea,
select {
  font-family: inherit;
  font-size: 1rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--bay-border, #e2e8f0);
  border-radius: 10px;
  background: var(--bay-card, #ffffff);
  color: var(--bay-text, #1e293b);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--bay-primary, #2d5a27);
  box-shadow: 0 0 0 3px rgba(45,90,39,0.12);
}

/* ---- 10. Skip link ---- */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--bay-primary, #2d5a27);
  color: #fff;
  padding: 0.5rem 1rem;
  text-decoration: none;
  border-radius: 0 0 8px 0;
  z-index: 200;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

/* ---- 11. Utility helpers ---- */
.highlight {
  background: linear-gradient(120deg, #fef3c7 0%, #fef3c7 100%);
  background-repeat: no-repeat;
  background-size: 100% 40%;
  background-position: 0 88%;
  padding: 0 0.15rem;
  border-radius: 3px;
}

.correct {
  background: var(--bay-success-bg, #dcfce7);
  border-color: var(--bay-success, #16a34a);
}

.incorrect {
  background: var(--bay-error-bg, #fee2e2);
  border-color: var(--bay-error, #dc2626);
}

/* ---- 12. Dark mode overrides ---- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn-secondary,
  :root:not([data-theme="light"]) .nav-btn,
  :root:not([data-theme="light"]) .chapter-nav a,
  :root:not([data-theme="light"]) .section,
  :root:not([data-theme="light"]) .progress-container,
  :root:not([data-theme="light"]) .german-example,
  :root:not([data-theme="light"]) .example-box,
  :root:not([data-theme="light"]) input,
  :root:not([data-theme="light"]) textarea,
  :root:not([data-theme="light"]) select {
    background: #1e1e1e;
    border-color: #333333;
    color: #e4e4e4;
  }

  :root:not([data-theme="light"]) .section-header {
    background: #262626;
    color: #e4e4e4;
  }

  :root:not([data-theme="light"]) .section-header:hover {
    background: #333333;
  }

  :root:not([data-theme="light"]) .nav-btn:hover,
  :root:not([data-theme="light"]) .chapter-nav a:hover {
    background: #262626;
  }
}

:root[data-theme="dark"] .btn-secondary,
:root[data-theme="dark"] .nav-btn,
:root[data-theme="dark"] .chapter-nav a,
:root[data-theme="dark"] .section,
:root[data-theme="dark"] .progress-container,
:root[data-theme="dark"] .german-example,
:root[data-theme="dark"] .example-box,
:root[data-theme="dark"] input,
:root[data-theme="dark"] textarea,
:root[data-theme="dark"] select {
  background: #1e1e1e;
  border-color: #333333;
  color: #e4e4e4;
}

:root[data-theme="dark"] .section-header {
  background: #262626;
  color: #e4e4e4;
}

:root[data-theme="dark"] .section-header:hover {
  background: #333333;
}

:root[data-theme="dark"] .nav-btn:hover,
:root[data-theme="dark"] .chapter-nav a:hover {
  background: #262626;
}