/* =================================================================
   IB IA Deadline Planner — stylesheet
   Palette: warm paper (bg), deep indigo (primary), amber (bottleneck)
   Fonts:   Fraunces (display serif), Inter (body sans)
   WCAG 2.2 AA verified: body 4.5:1+, large text 3:1+, focus 3:1+
   ================================================================= */

/* ---------- TOKENS ---------- */
:root,
[data-theme='light'] {
  /* Warm paper surfaces */
  --color-bg: #f3efe7;
  --color-surface: #faf7f0;
  --color-surface-2: #ffffff;
  --color-surface-offset: #ece7dc;
  --color-surface-offset-2: #e4dece;
  --color-divider: #d8d1c1;
  --color-border: #c4bca8;

  /* Text — ink on paper */
  --color-text: #1a1712;          /* 16.8:1 on bg */
  --color-text-muted: #5c544a;    /* 7.1:1 on bg */
  --color-text-faint: #8a8275;    /* 4.5:1 on bg */
  --color-text-inverse: #faf7f0;

  /* Primary — deep scholarly indigo */
  --color-primary: #2b3a8c;       /* 8.9:1 on bg */
  --color-primary-hover: #1e2a6b;
  --color-primary-active: #141c4d;
  --color-primary-highlight: #dfe2f0;
  --color-primary-on: #faf7f0;

  /* Bottleneck / warning — amber */
  --color-warning: #8f4e0a;       /* 5.6:1 on bg, 5.2:1 on warning-highlight */
  --color-warning-hover: #6d3806;
  --color-warning-highlight: #f4e4cd;

  /* Error — oxblood */
  --color-error: #a12a2a;         /* 6.2:1 on bg */
  --color-error-highlight: #f0d6d6;

  /* Success — forest */
  --color-success: #2d6b2d;       /* 6.1:1 on bg */

  /* Heatmap scale (uses OKLCH-ish steps of indigo) */
  --heat-0: #ece7dc;
  --heat-1: #c6c8dd;
  --heat-2: #8a8ec4;
  --heat-3: #555ba8;
  --heat-4: #2b3a8c;
  --heat-alert-bg: #fbe5c5;
  --heat-alert-ring: #8f4e0a;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 2px rgba(26, 23, 18, 0.06);
  --shadow-md: 0 4px 14px rgba(26, 23, 18, 0.08);
  --shadow-lg: 0 14px 32px rgba(26, 23, 18, 0.12);

  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Type scale */
  --text-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.84rem + 0.2vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.04rem + 0.5vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --text-2xl: clamp(2rem, 1.4rem + 2.5vw, 3.25rem);
  --text-hero: clamp(2.5rem, 1.4rem + 4.5vw, 4.5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --content-narrow: 720px;
  --content-default: 1080px;
  --content-wide: 1240px;

  --font-display: 'Fraunces', 'Iowan Old Style', 'Palatino Linotype', Georgia, serif;
  --font-body: 'Inter', 'Helvetica Neue', system-ui, sans-serif;
}

[data-theme='dark'] {
  --color-bg: #16130f;
  --color-surface: #1d1a14;
  --color-surface-2: #25211a;
  --color-surface-offset: #221e18;
  --color-surface-offset-2: #2a2620;
  --color-divider: #332f27;
  --color-border: #4a4538;

  --color-text: #f0ebe0;           /* 14:1 on bg */
  --color-text-muted: #b8b0a0;     /* 7.4:1 */
  --color-text-faint: #86806f;     /* 4.6:1 */
  --color-text-inverse: #16130f;

  --color-primary: #93a0e6;        /* 7.9:1 on bg — brighter for dark */
  --color-primary-hover: #b0baf0;
  --color-primary-active: #c5cdf5;
  --color-primary-highlight: #2d335c;
  --color-primary-on: #16130f;

  --color-warning: #e8a658;        /* 8.7:1 */
  --color-warning-hover: #f2bc7e;
  --color-warning-highlight: #3d2e18;

  --color-error: #e88080;          /* 7.3:1 */
  --color-error-highlight: #3d1e1e;

  --color-success: #7db87d;

  --heat-0: #252118;
  --heat-1: #343966;
  --heat-2: #4e558e;
  --heat-3: #7680c8;
  --heat-4: #b0bbf2;
  --heat-alert-bg: #4a3112;
  --heat-alert-ring: #e8a658;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 14px 32px rgba(0, 0, 0, 0.55);
}

/* System dark fallback */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #16130f;
    --color-surface: #1d1a14;
    --color-text: #f0ebe0;
  }
}

/* ---------- RESET / BASE ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  text-size-adjust: none;
}

body {
  min-height: 100dvh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  font-feature-settings: 'ss01', 'cv11';
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  text-wrap: balance;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

p {
  text-wrap: pretty;
  max-width: 68ch;
}

a {
  color: var(--color-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-hover);
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

/* Focus: highly visible, 3:1+ against any surface */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

[data-theme='dark'] :focus-visible {
  outline-color: var(--color-primary);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-primary-on);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  z-index: 1000;
  transition: top var(--transition);
}

.skip-link:focus {
  top: var(--space-4);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- LAYOUT ---------- */
.container {
  width: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 4vw, var(--space-8));
}

.container-narrow {
  max-width: var(--content-narrow);
}

/* ---------- HEADER ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: saturate(150%) blur(10px);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--color-divider);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
}

.brand-mark {
  color: var(--color-primary);
}

.brand-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}

.nav-list {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.nav-list a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
}

.nav-list a:hover {
  color: var(--color-text);
}

@media (max-width: 720px) {
  .nav-list {
    display: none;
  }
}

.theme-toggle {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text);
  border: 1px solid var(--color-divider);
  background: var(--color-surface);
}

.theme-toggle:hover {
  background: var(--color-surface-offset);
}

.theme-icon {
  width: 18px;
  height: 18px;
  display: block;
}

/* ---------- HERO ---------- */
.hero {
  padding-block: clamp(var(--space-12), 9vw, var(--space-24));
  background:
    radial-gradient(
      ellipse at top left,
      color-mix(in srgb, var(--color-primary) 8%, transparent),
      transparent 55%
    ),
    var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
}

.hero-inner {
  max-width: 880px;
}

.eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-weight: 600;
  margin-bottom: var(--space-6);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full, 999px);
}

.hero-title {
  font-size: var(--text-hero);
  font-weight: 500;
  font-variation-settings: 'opsz' 144;
  margin-bottom: var(--space-6);
  letter-spacing: -0.025em;
  line-height: 1.02;
}

.hero-accent {
  font-style: italic;
  color: var(--color-primary);
  font-weight: 400;
  padding-right: 0.12em; /* prevent italic terminal from crashing into next word */
}

.hero-sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin-bottom: var(--space-8);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  max-width: 680px;
}

.hero-stats > div > dt {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-1);
  font-weight: 600;
}

.hero-stats > div > dd {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  min-height: 44px;
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-primary-on);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  color: var(--color-primary-on);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-surface-offset);
  border-color: var(--color-text-muted);
}

.btn-ghost {
  color: var(--color-text);
  background: transparent;
  border-color: var(--color-divider);
}

.btn-ghost:hover {
  background: var(--color-surface);
  border-color: var(--color-border);
}

/* ---------- SECTION HEADINGS ---------- */
.section-title {
  font-size: var(--text-2xl);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.section-sub {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  margin-bottom: var(--space-10);
  max-width: 62ch;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.section-head h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-1);
}

.section-hint {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  max-width: 56ch;
}

/* ---------- HOW / PHASES ---------- */
.how {
  padding-block: clamp(var(--space-12), 8vw, var(--space-20));
  background: var(--color-surface-offset);
  border-bottom: 1px solid var(--color-divider);
}

.phase-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-4);
  list-style: none;
  counter-reset: phase;
}

.phase-list > li {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  position: relative;
  transition: transform var(--transition), border-color var(--transition);
}

.phase-list > li:hover {
  border-color: var(--color-border);
}

.phase-num {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

.phase-list h3 {
  font-size: var(--text-lg);
  font-weight: 500;
}

.phase-list p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.phase-weeks {
  margin-top: auto;
  padding-top: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-top: 1px dashed var(--color-divider);
}

/* ---------- PLANNER FORM ---------- */
.planner {
  padding-block: clamp(var(--space-12), 8vw, var(--space-20));
}

.planner-form {
  margin-bottom: var(--space-12);
}

.form-grid {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.ia-row {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-4);
  align-items: start;
}

.ia-row-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  grid-column: 1 / -1;
}

.ia-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  border-radius: var(--radius-full, 999px);
  font-size: var(--text-xs);
  font-weight: 700;
  font-family: var(--font-display);
}

.ia-row-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  flex: 1;
}

.ia-remove {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: 24px;
  line-height: 1;
  flex-shrink: 0;
}

.ia-remove:hover {
  background: var(--color-error-highlight);
  color: var(--color-error);
}

.ia-fields {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  grid-column: 1 / -1;
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.field label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.field label .req {
  color: var(--color-error);
  margin-left: 2px;
}

.field .hint {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 400;
}

.field input[type='text'],
.field input[type='date'],
.field select {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  color: var(--color-text);
  min-height: 44px;
  font-size: var(--text-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}

.field input:focus-visible,
.field select:focus-visible {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 25%, transparent);
  outline: none;
}

.field.checkbox-field {
  flex-direction: row;
  align-items: center;
  gap: var(--space-3);
}

.field.checkbox-field label {
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
}

.field input[type='checkbox'] {
  width: 20px;
  height: 20px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.advanced {
  grid-column: 1 / -1;
  border-top: 1px dashed var(--color-divider);
  padding-top: var(--space-4);
  margin-top: var(--space-2);
}

.advanced summary {
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  user-select: none;
}

.advanced summary::-webkit-details-marker {
  display: none;
}

.advanced summary::before {
  content: '›';
  font-size: 18px;
  line-height: 1;
  transition: transform var(--transition);
}

.advanced[open] summary::before {
  transform: rotate(90deg);
}

.phases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.phases-grid .field input[type='number'] {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  min-height: 40px;
  font-size: var(--text-sm);
}

.phases-grid .field label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ---------- OUTPUT: summary cards ---------- */
.plan-output {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}

.summary-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.summary-card.alert {
  background: var(--color-warning-highlight);
  border-color: var(--color-warning);
}

.summary-card dt {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.summary-card.alert dt {
  color: var(--color-warning);
}

.summary-card dd {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.2;
}

.summary-card .detail {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 400;
  margin-top: var(--space-1);
}

/* ---------- HEATMAP ---------- */
.heatmap-section {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  align-items: center;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.sw {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 3px;
  border: 1px solid var(--color-border);
}

.sw-0 { background: var(--heat-0); }
.sw-1 { background: var(--heat-1); }
.sw-2 { background: var(--heat-2); }
.sw-3 { background: var(--heat-3); }
.sw-alert { background: var(--heat-alert-bg); border-color: var(--heat-alert-ring); border-width: 2px; }

.heatmap-wrap {
  overflow-x: auto;
  padding: var(--space-4) 0;
  margin: 0 calc(-1 * var(--space-4));
  padding-inline: var(--space-4);
  scrollbar-width: thin;
}

.heatmap-wrap:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-md);
}

.heatmap-grid {
  display: grid;
  gap: 6px;
  grid-template-columns: 160px repeat(var(--weeks), minmax(28px, 36px));
  min-width: max-content;
  align-items: center;
}

.heat-row-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text);
  padding-right: var(--space-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.heat-row-label.muted {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: var(--text-xs);
  letter-spacing: 0.02em;
}

.heat-cell {
  height: 28px;
  border-radius: 4px;
  background: var(--heat-0);
  border: 1px solid transparent;
  position: relative;
  cursor: default;
}

.heat-cell[data-count='1'] { background: var(--heat-1); }
.heat-cell[data-count='2'] { background: var(--heat-2); }
.heat-cell[data-count='3'] { background: var(--heat-3); }
.heat-cell[data-count='4'],
.heat-cell[data-count='5'],
.heat-cell[data-count='6'] { background: var(--heat-4); }

.heat-cell.alert {
  background: var(--heat-alert-bg);
  border: 2px solid var(--heat-alert-ring);
}

.heat-cell.phase {
  background: var(--color-primary);
  border-radius: 4px;
}

.heat-cell.phase.sci {
  background: color-mix(in srgb, var(--color-primary) 60%, var(--color-warning));
}

.heat-cell.milestone {
  background: var(--color-warning);
}

.heat-col-header {
  font-size: 10px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-align: center;
  transform: rotate(-55deg);
  transform-origin: bottom left;
  height: 60px;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding-bottom: var(--space-1);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.heat-col-header.alert {
  color: var(--color-warning);
  font-weight: 700;
}

.heat-col-spacer {
  height: 60px;
}

/* Native tooltip via title attribute is accessible; supplement with hover ring */
.heat-cell:hover,
.heat-cell:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 1px;
  z-index: 2;
}

/* ---------- MILESTONES LIST ---------- */
.milestones-section {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.export-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.milestones-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.week-group {
  border-left: 3px solid var(--color-divider);
  padding-left: var(--space-5);
  padding-block: var(--space-2);
  transition: border-color var(--transition);
}

.week-group.alert {
  border-left-color: var(--color-warning);
}

.week-group.past {
  opacity: 0.55;
}

.week-group-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.week-group-date {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
}

.week-badge {
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.week-badge.alert {
  background: var(--color-warning-highlight);
  color: var(--color-warning);
}

.week-milestones {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  list-style: none;
}

.milestone-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
}

.milestone-subject {
  font-weight: 600;
  color: var(--color-primary);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  min-width: 120px;
}

.milestone-label {
  color: var(--color-text);
  flex: 1;
}

.milestone-phase {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 500;
}

.empty-state {
  padding: var(--space-8);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  border: 1px dashed var(--color-border);
}

/* ---------- FAQ ---------- */
.faq {
  padding-block: clamp(var(--space-12), 8vw, var(--space-20));
  background: var(--color-surface-offset);
  border-top: 1px solid var(--color-divider);
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  padding: var(--space-4) var(--space-5);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 44px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 22px;
  line-height: 1;
  color: var(--color-text-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item summary:hover {
  background: var(--color-surface-offset);
}

.faq-item > p {
  padding: 0 var(--space-5) var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* ---------- FOOTER ---------- */
.site-footer {
  padding-block: var(--space-10);
  border-top: 1px solid var(--color-divider);
  background: var(--color-bg);
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.footer-meta {
  color: var(--color-text-faint);
  font-style: italic;
}

/* ---------- PRINT ---------- */
@media print {
  .site-header,
  .hero,
  .how,
  .faq,
  .site-footer,
  .planner-form,
  .export-actions {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  .heatmap-section,
  .milestones-section,
  .summary-card {
    break-inside: avoid;
    border: 1px solid #999;
    background: #fff;
  }

  .week-group {
    break-inside: avoid;
  }
}