/* ═══════════════════════════════════════════════════════
   Material Design 3 — FPA Advocate Standards
   ═══════════════════════════════════════════════════════
   NOTE: This file uses its own --md-* tokens only.
   It does NOT override the shared --bg-*, --text-*, etc.
   variables that advocate-nav.css depends on.
   ═══════════════════════════════════════════════════════ */

/* ── 1. MD3 Design Tokens ────────────────────────────── */
:root {
  --md-primary:                #006A6B;
  --md-on-primary:             #FFFFFF;
  --md-primary-container:      #9CF0F0;
  --md-on-primary-container:   #002020;

  --md-secondary:              #4A6363;
  --md-on-secondary:           #FFFFFF;
  --md-secondary-container:    #CCE8E7;
  --md-on-secondary-container: #051F1F;

  --md-surface:                       #FAFDFC;
  --md-on-surface:                    #191C1C;
  --md-surface-variant:               #DAE5E4;
  --md-on-surface-variant:            #3F4948;
  --md-surface-container-lowest:      #FFFFFF;
  --md-surface-container-low:         #F4F7F6;
  --md-surface-container:             #EEF1F0;
  --md-surface-container-high:        #E8ECEB;

  --md-outline:                #6F7978;
  --md-outline-variant:        #BEC9C8;

  /* Level badge colors */
  --level-found-bg:  #E8F5E9;
  --level-found-fg:  #1B5E20;
  --level-adv-bg:    #EDE7F6;
  --level-adv-fg:    #4527A0;

  /* MD3 Elevation */
  --elev-1: 0 1px 2px rgba(0,0,0,.08), 0 1px 3px 1px rgba(0,0,0,.06);
  --elev-2: 0 1px 2px rgba(0,0,0,.08), 0 2px 6px 2px rgba(0,0,0,.08);
  --elev-3: 0 4px 8px 3px rgba(0,0,0,.10), 0 1px 3px rgba(0,0,0,.10);
}

.dark {
  --md-primary:                #4DD9DA;
  --md-on-primary:             #003737;
  --md-primary-container:      #004F50;
  --md-on-primary-container:   #9CF0F0;

  --md-secondary:              #B0CCCB;
  --md-on-secondary:           #1B3534;
  --md-secondary-container:    #324B4B;
  --md-on-secondary-container: #CCE8E7;

  --md-surface:                       #191C1C;
  --md-on-surface:                    #E0E3E3;
  --md-surface-variant:               #3F4948;
  --md-on-surface-variant:            #BEC9C8;
  --md-surface-container-lowest:      #141717;
  --md-surface-container-low:         #191C1C;
  --md-surface-container:             #1E2121;
  --md-surface-container-high:        #282B2B;

  --md-outline:                #88938F;
  --md-outline-variant:        #3F4948;

  --level-found-bg: #1B3320;
  --level-found-fg: #A5D6A7;
  --level-adv-bg:   #1A0E2D;
  --level-adv-fg:   #CE93D8;

  --elev-1: 0 1px 2px rgba(0,0,0,.30), 0 1px 3px 1px rgba(0,0,0,.20);
  --elev-2: 0 1px 2px rgba(0,0,0,.30), 0 2px 6px 2px rgba(0,0,0,.25);
  --elev-3: 0 4px 8px 3px rgba(0,0,0,.30), 0 1px 3px rgba(0,0,0,.30);
}

/* ── 2. Base ───────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  overflow-x: hidden;
  width: 100%;
}

body {
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--md-surface);
  color: var(--md-on-surface);
  line-height: 1.6;
  overflow-x: hidden;
  width: 100%;
  position: relative;
}

a { text-decoration: none; color: inherit; }

.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
  line-height: 1;
  user-select: none;
}

/* ── 3. Hero ───────────────────────────────────────────── */
.standards-hero {
  position: relative;
  background: linear-gradient(145deg, #005353 0%, #006A6B 40%, #003737 100%);
  color: #fff;
  padding: 4rem 2rem 5rem;
  overflow-x: hidden;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--md-primary-container);
  margin-bottom: 1.25rem;
}

.hero-eyebrow .material-symbols-outlined {
  font-size: 16px;
}

.hero-display {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: #fff;
  margin-bottom: 1.25rem;
}

.hero-body {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.78);
  max-width: 580px;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-number {
  font-size: 2.25rem;
  font-weight: 300;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
}

.hero-stat-divider {
  display: block;
  width: 1px;
  height: 44px;
  background: rgba(255, 255, 255, 0.2);
  flex-shrink: 0;
}

/* Decorative circles — contained within hero */
.hero-decoration {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-circle {
  position: absolute;
  border-radius: 50%;
  flex-shrink: 0;
}

.hero-circle-1 {
  width: 500px;
  height: 500px;
  right: -120px;
  top: -150px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-circle-2 {
  width: 300px;
  height: 300px;
  right: 160px;
  bottom: -120px;
  background: rgba(255, 255, 255, 0.04);
}

.hero-circle-3 {
  width: 130px;
  height: 130px;
  right: 90px;
  top: 60px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

/* ── 4. Domain Navigation Bar ──────────────────────────── */
.domain-nav-bar {
  position: sticky;
  top: 64px;
  z-index: 100;
  background-color: var(--md-surface-container-lowest);
  border-bottom: 1px solid var(--md-outline-variant);
  box-shadow: var(--elev-1);
  overflow-x: hidden; /* hidden (not clip) creates a BFC that properly contains the inner scroller */
}

.domain-nav-scroller {
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.domain-nav-scroller::-webkit-scrollbar {
  display: none;
}

.domain-nav-inner {
  display: flex;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  min-width: 0;
}

.domain-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 1.5rem;
  height: 56px;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--md-on-surface-variant);
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.15s ease, border-bottom-color 0.2s ease;
  white-space: nowrap;
}

.domain-tab .material-symbols-outlined {
  font-size: 20px;
}

.domain-tab:hover {
  color: var(--md-on-surface);
  background-color: var(--md-surface-container-low);
}

.domain-tab.active {
  color: var(--md-primary);
  border-bottom-color: var(--md-primary);
}

.domain-tab.active .material-symbols-outlined {
  font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

.domain-tab-code {
  font-size: 0.625rem;
  font-family: 'Roboto Mono', 'Courier New', monospace;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--md-surface-container);
  color: var(--md-outline);
}

/* ── 5. Page Body Layout ───────────────────────────────── */
.standards-body {
  display: flex;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  gap: 2.5rem;
  align-items: flex-start;
  min-width: 0;
}

/* ── 6. Sidebar ─────────────────────────────────────────── */
/* Sidebar is sticky: it tracks the viewport as the user scrolls,
   with max-height so the strand list scrolls internally when needed. */
.standards-sidebar {
  width: 220px;
  flex-shrink: 0;
  padding-top: 2rem;
  padding-bottom: 2rem;
  position: sticky;
  top: calc(64px + 56px + 1.5rem); /* top nav + domain bar + breathing room */
  align-self: flex-start;
  max-height: calc(100vh - 64px - 56px - 3rem);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--md-outline-variant) transparent;
}

.standards-sidebar::-webkit-scrollbar {
  width: 4px;
}

.standards-sidebar::-webkit-scrollbar-thumb {
  background: var(--md-outline-variant);
  border-radius: 2px;
}

.sidebar-heading {
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--md-outline);
  padding: 0 16px;
  margin-bottom: 0.5rem;
}

/* Strand nav scrolls inside the sticky sidebar — no need for its own
   sticky or overflow since the sidebar wrapper handles both. */
.strand-nav {
  scrollbar-width: thin;
  scrollbar-color: var(--md-outline-variant) transparent;
}

.strand-nav::-webkit-scrollbar {
  width: 4px;
}

.strand-nav::-webkit-scrollbar-thumb {
  background: var(--md-outline-variant);
  border-radius: 2px;
}

.strand-nav-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
  padding: 9px 16px;
  border: none;
  border-radius: 28px;
  background: transparent;
  color: var(--md-on-surface-variant);
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.8125rem;
  font-weight: 400;
  line-height: 1.45;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.strand-nav-item:hover {
  background-color: var(--md-surface-container-low);
  color: var(--md-on-surface);
}

.strand-nav-item.active {
  background-color: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  font-weight: 500;
}

.strand-nav-code {
  font-size: 0.625rem;
  font-family: 'Roboto Mono', 'Courier New', monospace;
  color: var(--md-outline);
  flex-shrink: 0;
  margin-top: 2px;
  line-height: 1.6;
}

.strand-nav-item.active .strand-nav-code {
  color: var(--md-on-secondary-container);
  opacity: 0.7;
}

/* ── 7. Standards Main ─────────────────────────────────── */
.standards-main {
  flex: 1;
  min-width: 0; /* critical: prevent flex child overflow */
  padding-top: 2rem;
  padding-bottom: 5rem;
}

/* Mobile strand chips */
.strand-chips-mobile {
  display: none;
  gap: 8px;
  overflow-x: auto;
  overflow-y: hidden; /* must not be 'visible' alongside overflow-x: auto — browsers promote it to auto, causing unexpected scroll */
  padding-bottom: 1.25rem;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  width: 100%;
  max-width: 100%;
}

.strand-chips-mobile::-webkit-scrollbar {
  display: none;
}

.strand-chip-mobile {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 100px;
  border: 1px solid var(--md-outline-variant);
  background: var(--md-surface-container-lowest);
  color: var(--md-on-surface-variant);
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
  flex-shrink: 0;
}

.strand-chip-mobile:hover {
  background-color: var(--md-surface-container-low);
  border-color: var(--md-outline);
  color: var(--md-on-surface);
}

.strand-chip-mobile.active {
  background-color: var(--md-secondary-container);
  border-color: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}

/* ── 8. Strand Section ─────────────────────────────────── */
.strand-section {
  margin-bottom: 3.5rem;
  /* Account for sticky nav + domain bar when scrolling into view */
  scroll-margin-top: calc(64px + 56px + 28px);
}

.strand-section-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding-bottom: 1.25rem;
  border-bottom: 2px solid var(--md-outline-variant);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.strand-code-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  border-radius: 6px;
  font-size: 0.625rem;
  font-family: 'Roboto Mono', 'Courier New', monospace;
  font-weight: 500;
  letter-spacing: 0.05em;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 4px;
}

.strand-title {
  font-size: 1.3125rem;
  font-weight: 500;
  color: var(--md-on-surface);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

/* ── 9. Standard Cards ─────────────────────────────────── */
.standard-card {
  background: var(--md-surface-container-lowest);
  border: 1px solid var(--md-outline-variant);
  border-radius: 16px;
  margin-bottom: 1rem;
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.standard-card:hover {
  box-shadow: var(--elev-2);
  border-color: var(--md-outline);
}

.std-header {
  padding: 1.25rem 1.25rem 0.75rem;
}

.std-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.std-code {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-radius: 6px;
  font-size: 0.625rem;
  font-family: 'Roboto Mono', 'Courier New', monospace;
  font-weight: 500;
  letter-spacing: 0.05em;
}

/* Level chips */
.level-chip {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.level-chip.foundational {
  background: var(--level-found-bg);
  color: var(--level-found-fg);
}

.level-chip.advanced {
  background: var(--level-adv-bg);
  color: var(--level-adv-fg);
}

.std-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--md-on-surface);
  line-height: 1.45;
  letter-spacing: -0.005em;
}

.std-body {
  padding: 0 1.25rem 1rem;
}

.std-count {
  font-size: 0.8125rem;
  color: var(--md-outline);
  margin-top: 0.375rem;
}

/* ── 10. Benchmark Toggle ──────────────────────────────── */
.std-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 0.75rem 1.25rem;
  border: none;
  border-top: 1px solid var(--md-outline-variant);
  background: var(--md-surface-container-low);
  color: var(--md-primary);
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: background-color 0.15s ease;
}

.std-toggle:hover {
  background-color: var(--md-surface-container);
}

.std-toggle .material-symbols-outlined {
  font-size: 18px;
}

.toggle-icon {
  transition: transform 0.25s ease;
}

.std-toggle.open .toggle-icon {
  transform: rotate(180deg);
}

/* ── 11. Benchmark List ────────────────────────────────── */
.std-benchmarks {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.std-benchmarks.open {
  max-height: 4000px;
  border-top: 1px solid var(--md-outline-variant);
}

.benchmark-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 0 0.875rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--md-outline-variant);
  transition: background-color 0.15s ease;
}

.benchmark-item:last-child {
  border-bottom: none;
}

.benchmark-item:hover {
  background-color: var(--md-surface-container-low);
}

.benchmark-letter {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  font-size: 0.6875rem;
  font-family: 'Roboto Mono', 'Courier New', monospace;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
  text-transform: lowercase;
}

.benchmark-text {
  font-size: 0.875rem;
  color: var(--md-on-surface);
  line-height: 1.65;
}

.benchmark-citation {
  font-size: 0.6875rem;
  font-family: 'Roboto Mono', 'Courier New', monospace;
  color: var(--md-outline);
  margin-top: 0.4rem;
  line-height: 1.5;
}

/* ── 12. Standard Courses Bar ──────────────────────────── */
.std-courses {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.875rem 1.25rem;
  border-top: 1px solid var(--md-outline-variant);
  background: var(--md-surface-container-low);
  flex-wrap: wrap;
}

.std-courses-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--md-outline);
}

.std-courses-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: 100px;
  border: 1px solid var(--md-outline-variant);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--md-outline);
  background: transparent;
}

.std-courses-chip .material-symbols-outlined {
  font-size: 14px;
}

.std-courses-chip.has-courses {
  background: var(--md-primary-container);
  border-color: var(--md-primary-container);
  color: var(--md-on-primary-container);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease;
}

.std-courses-chip.has-courses:hover {
  background-color: var(--md-primary);
  border-color: var(--md-primary);
  color: var(--md-on-primary);
}

/* ── 13. Loading State ─────────────────────────────────── */
.page-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 7rem 2rem;
  gap: 1.5rem;
  color: var(--md-on-surface-variant);
  font-size: 0.9375rem;
}

.spinner-md3 {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 4px solid var(--md-primary-container);
  border-top-color: var(--md-primary);
  animation: md3-spin 0.85s linear infinite;
}

@keyframes md3-spin {
  to { transform: rotate(360deg); }
}

/* ── 14. Error State ───────────────────────────────────── */
.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6rem 2rem;
  text-align: center;
  gap: 1rem;
  color: var(--md-on-surface-variant);
}

.error-state .material-symbols-outlined {
  font-size: 48px;
  color: var(--md-outline);
  margin-bottom: 0.5rem;
}

.error-state h3 {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--md-on-surface);
}

/* ── 15. Responsive ────────────────────────────────────── */
@media (max-width: 1100px) {
  .standards-sidebar {
    display: none;
  }

  .strand-chips-mobile {
    display: flex;
  }

  .standards-body {
    padding: 0 1.5rem;
    overflow-x: hidden; /* contain any child that might bleed on tablet */
  }
}

@media (max-width: 768px) {
  .standards-hero {
    padding: 3rem 1.25rem 4rem;
  }

  .hero-display {
    font-size: 2.25rem;
  }

  .hero-body {
    font-size: 0.9375rem;
  }

  .hero-stats {
    gap: 1.25rem;
  }

  .stat-number {
    font-size: 1.75rem;
  }

  .domain-nav-inner {
    padding: 0 1rem;
  }

  .domain-tab {
    padding: 0 1rem;
    font-size: 0.8125rem;
  }

  .domain-tab-code {
    display: none;
  }

  .standards-body {
    padding: 0 1rem;
    overflow-x: hidden;
  }

  .standards-main,
  .strand-section {
    max-width: 100%;
    min-width: 0;
  }

  .strand-section-header {
    gap: 6px;
  }
}

@media (max-width: 480px) {
  .standards-hero {
    padding: 2.5rem 1rem 3.5rem;
  }

  .hero-display {
    font-size: 2rem;
  }

  /* Hide stat dividers on very small screens */
  .hero-stat-divider {
    display: none;
  }

  .hero-stats {
    gap: 1.25rem;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  /* Simplify domain tabs on tiny screens */
  .domain-tab .material-symbols-outlined {
    display: none;
  }

  .domain-tab {
    padding: 0 0.875rem;
    font-size: 0.8125rem;
  }

  /* Hide decorative circles — they can cause layout shift */
  .hero-circle {
    display: none;
  }

  .standards-body {
    padding: 0 0.875rem;
    overflow-x: hidden;
  }

  /* Prevent card padding from causing scroll */
  .std-header,
  .std-body,
  .std-toggle,
  .std-courses,
  .benchmark-item {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  /* Cards must never exceed the viewport width */
  .standard-card {
    max-width: 100%;
    word-break: break-word;
  }
}