/* design.md : Tomorro tokens */
:root {
  --color-bg: #faf7f2;
  --color-surface: #ffffff;
  --color-text: #161616;
  --color-muted: #5f5f68;
  --color-subtle: #8b8b95;
  --color-border: #efe8df;
  --color-border-light: #e8e2da;

  --color-green-soft: #dff7e8;
  --color-green-mid-soft: #d4f0de;
  --color-brand-dark: #0b1c12;
  --color-lime: #c8ff57;
  --color-green-dark: #063b27;
  --color-green-text: #1a6b47;
  /* Alias D.A. Tomorro (remplace violet) */
  --color-accent: var(--color-green-dark);
  --color-accent-soft: #eef8f1;
  --color-yellow-soft: #fff3c4;
  --color-red-soft: #fde8e8;
  --color-red: #c53030;

  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-xl: 36px;
  --radius-pill: 999px;

  --shadow-soft: 0 20px 60px rgba(25, 20, 10, 0.08);
  --shadow-card: 0 12px 32px rgba(25, 20, 10, 0.06);

  --container: 1200px;
  --header-h: 76px;
  --font: "Inter", system-ui, -apple-system, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

/* Header Tomorro (fond vert foncé) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(11, 28, 18, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.site-header__inner {
  max-width: var(--container);
  margin: 0 auto;
  height: 100%;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.logo__img {
  display: block;
  height: 1.5rem;
  width: auto;
  max-width: 8.75rem;
  object-fit: contain;
  /* Logo foncé : affichage blanc sur header vert foncé */
  filter: brightness(0) invert(1);
}

.site-nav {
  display: none;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .site-nav {
    display: flex;
  }
}

.site-nav__item {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color 0.15s ease;
}

.site-nav__item:hover {
  color: #fff;
}

.site-nav__item--active {
  color: var(--color-lime);
  font-weight: 600;
}

.site-nav__item--muted {
  color: rgba(255, 255, 255, 0.38);
}

.header-badge {
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  background: var(--color-lime);
  border: none;
  color: var(--color-brand-dark);
  white-space: nowrap;
}

/* Sous-nav Exercice 3 (Partie A / Partie B) */
.subnav {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.subnav__link {
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  color: var(--color-muted);
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}

.subnav__link:hover {
  background: var(--color-accent-soft);
  color: var(--color-green-dark);
}

.subnav__link--active {
  background: var(--color-green-dark);
  color: #fff;
  font-weight: 600;
}

/* Hero */
.hero {
  padding: 3rem 1.5rem 2.5rem;
}

.hero__inner {
  max-width: var(--container);
  margin: 0 auto;
  text-align: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  line-height: 1;
}

.hero .badge {
  margin-bottom: 1.25rem;
}

.badge--ai {
  color: var(--color-brand-dark);
  background: var(--color-lime);
  font-weight: 700;
}

.hero h1 {
  margin: 0 auto 1.25rem;
  max-width: 18ch;
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.text-accent {
  color: var(--color-green-dark);
}

.lead {
  margin: 0 auto;
  max-width: 42rem;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-muted);
}

/* Layout */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem 5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 3rem 6rem;
    gap: 2.5rem;
  }
}

/* Panels / cards */
.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

@media (min-width: 768px) {
  .panel {
    padding: 2rem 2.25rem;
    border-radius: var(--radius-xl);
  }
}

.panel:hover {
  box-shadow: var(--shadow-soft);
}

.panel h2 {
  margin: 0 0 1.25rem;
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-green-dark);
}

.panel--fade {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease, box-shadow 0.25s ease;
}

.panel--fade.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  margin-bottom: 1.25rem;
}

.panel-head h2 {
  margin: 0 0 0.25rem;
}

.hint {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-subtle);
}

/* Criteria cards */
.criteria {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .criteria {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card-mini {
  padding: 1.25rem 1.35rem;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.card-mini:hover {
  background: #eef8f1;
  border-color: #a8dcc0;
}

.card-mini__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  margin-bottom: 0.75rem;
  border-radius: var(--radius-sm);
  background: #d4f0de;
  color: var(--color-green-text);
}

.card-mini strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-green-dark);
}

.card-mini span:last-child {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.5;
}

/* Chips */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  background: var(--color-green-dark);
  color: #fff;
  border: 1px solid transparent;
}

.chip--mid {
  background: var(--color-green-mid-soft);
  color: var(--color-green-text);
  border: 1px solid #a8dcc0;
}

.chip--muted {
  background: var(--color-accent-soft);
  color: var(--color-green-text);
  border: 1px solid #d4ebe0;
}

.chip--warn {
  background: #eef8f1;
  color: var(--color-subtle);
  border: 1px solid var(--color-border);
  text-decoration: line-through;
}

/* Table */
.table-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
  background: var(--color-bg);
}

.table-wrap {
  overflow-x: auto;
}

.prio-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--color-surface);
}

.prio-table th,
.prio-table td {
  padding: 1rem 1.1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.prio-table th {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-subtle);
  background: var(--color-bg);
  white-space: nowrap;
}

.prio-table tbody tr {
  cursor: pointer;
  transition: background 0.15s ease;
}

.prio-table tbody tr:last-child td {
  border-bottom: none;
}

.prio-table tbody tr:hover,
.prio-table tbody tr.is-active {
  background: var(--color-accent-soft);
}

.prio-table tbody tr:focus-visible {
  outline: 2px solid var(--color-green-dark);
  outline-offset: -2px;
}

.rank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  background: var(--color-green-mid-soft);
  color: var(--color-green-dark);
}

.rank--muted {
  background: var(--color-bg);
  color: var(--color-subtle);
}

.code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.625rem;
  height: 1.625rem;
  margin-right: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 8px;
  background: var(--color-green-soft);
  color: var(--color-green-dark);
  vertical-align: middle;
}

.code--muted {
  background: var(--color-bg);
  color: var(--color-subtle);
}

.prio-table td .name {
  vertical-align: middle;
}

.name {
  font-weight: 600;
  color: var(--color-text);
}

.name--muted {
  color: var(--color-subtle);
  font-weight: 500;
  text-decoration: line-through;
  text-decoration-color: var(--color-border-light);
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.2;
  border-radius: var(--radius-pill);
  white-space: nowrap;
  vertical-align: middle;
}

/* Dégradé vert : faible, modéré, élevé */
.pill--low {
  color: #3d6b52;
  background: #eef8f1;
  border: 1px solid #d4ebe0;
}

.pill--mid {
  color: #1f5c3f;
  background: #d4f0de;
  border: 1px solid #a8dcc0;
}

.pill--high {
  color: #fff;
  background: #1a6b47;
  border: 1px solid #145a3a;
}

.pill--setup {
  font-size: 0.7rem;
  max-width: 9.5rem;
  white-space: normal;
  text-align: center;
  line-height: 1.25;
}

.prio-table .badge {
  margin: 0;
  vertical-align: middle;
}

.badge--launch,
.badge--test,
.badge--later,
.badge--kill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 1.75rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--radius-pill);
  line-height: 1;
}

.badge--launch {
  color: #fff;
  background: var(--color-green-dark);
}

.badge--test {
  color: var(--color-green-dark);
  background: var(--color-lime);
}

.badge--later {
  color: var(--color-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}

.badge--kill {
  color: var(--color-red);
  background: var(--color-red-soft);
}

.col-score,
.score {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-green-dark);
  text-align: center;
}

.score--muted {
  color: var(--color-subtle);
}

.score-legend {
  margin: 1.25rem 0 0;
  font-size: 0.8125rem;
  color: var(--color-subtle);
  line-height: 1.55;
}

/* Estimates cards (exercice 1) */
.estimates-grid {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

@media (min-width: 700px) {
  .estimates-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .estimates-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .estimates-grid .estimate-card:last-child {
    grid-column: span 2;
  }
}

.estimate-card {
  padding: 0.85rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}

.estimate-card:hover,
.estimate-card.is-active {
  border-color: #a8dcc0;
  box-shadow: 0 0 0 1px #a8dcc0;
}

.estimate-card:focus-visible {
  outline: 2px solid var(--color-green-dark);
  outline-offset: 2px;
}

.estimate-card--muted {
  opacity: 0.72;
}

.estimate-card__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.65rem;
}

.estimate-card__name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
}

.estimate-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.estimate-hero__block {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0.85rem 0.5rem;
  border-radius: var(--radius-md);
}

.estimate-hero__block--gain {
  background: linear-gradient(180deg, #ecfdf5 0%, #d4f0de 100%);
  border: 1px solid #a8dcc0;
}

.estimate-hero__block--cost {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}

.estimate-hero__label {
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-subtle);
  margin-bottom: 0.25rem;
}

.estimate-hero__amount {
  font-size: clamp(1.35rem, 4vw, 1.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.estimate-hero__block--gain .estimate-hero__amount {
  color: var(--color-green-dark);
}

.estimate-hero__block--cost .estimate-hero__amount {
  color: var(--color-text);
}

.estimate-hero__amount--uncertain {
  color: #b45309;
}

.estimate-hero__note {
  margin-top: 0.2rem;
  font-size: 0.6875rem;
  color: var(--color-muted);
  line-height: 1.3;
}

.estimate-hero--large .estimate-hero__amount {
  font-size: clamp(1.75rem, 5vw, 2.25rem);
}

.estimate-hero--large {
  margin-bottom: 1rem;
}

.estimate-card__foot {
  margin: 0;
  font-size: 0.6875rem;
  color: var(--color-subtle);
  text-align: center;
}

.estimate-card__cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.estimate-card__col-title {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0 0 0.4rem;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-subtle);
}

.calc-help {
  position: relative;
  display: inline-block;
}

.calc-help__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1rem;
  height: 1.1rem;
  margin: 0;
  padding: 0;
  font-size: 0.65rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-green-dark);
  background: var(--color-accent-soft);
  border: 1px solid #a8dcc0;
  border-radius: 50%;
  cursor: pointer;
  list-style: none;
  text-transform: none;
  letter-spacing: 0;
}

.calc-help__btn::-webkit-details-marker {
  display: none;
}

.calc-help[open] .calc-help__btn {
  background: var(--color-green-dark);
  color: #fff;
}

.calc-help__text {
  position: absolute;
  z-index: 5;
  top: calc(100% + 0.35rem);
  left: 0;
  width: min(17rem, 70vw);
  margin: 0;
  padding: 0.65rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1.45;
  text-transform: none;
  letter-spacing: 0;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  white-space: pre-line;
}

.est-metric {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 0.1rem 0.35rem;
  align-items: center;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--color-border-light);
}

.est-metric:last-child {
  border-bottom: none;
}

.est-metric__label {
  grid-column: 1;
  font-size: 0.6875rem;
  color: var(--color-subtle);
}

.est-metric__val {
  grid-column: 1;
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
  flex-wrap: wrap;
}

.est-num {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-green-dark);
  font-variant-numeric: tabular-nums;
}

.est-sub {
  font-size: 0.6875rem;
  color: var(--color-muted);
}

.est-metric .est-pill {
  grid-column: 2;
  grid-row: 1 / 3;
  align-self: center;
}

.est-metric--debt {
  grid-template-columns: 1fr auto;
}

.est-pill {
  display: inline-block;
  font-size: 0.625rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  white-space: nowrap;
}

.est-pill--low {
  background: #eef8f1;
  color: #3d6b52;
}

.est-pill--mid {
  background: #d4f0de;
  color: #1f5c3f;
}

.est-pill--high {
  background: #1a6b47;
  color: #fff;
}

.est-pill--veryHigh {
  background: var(--color-green-dark);
  color: var(--color-lime);
}

.est-pill--uncertain {
  background: #fffbeb;
  color: #b45309;
}

.estimates-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.85rem 0 0;
}

.detail-estimates--visual {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

@media (min-width: 640px) {
  .detail-estimates--visual {
    grid-template-columns: 1fr 1fr;
  }
}

.detail-estimates--visual .detail-estimates__col {
  padding: 0.85rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.detail-metrics .est-metric {
  padding: 0.45rem 0;
}

.estimate-hyp--compact {
  margin: 0.65rem 0 0;
  padding-left: 1rem;
  font-size: 0.75rem;
  color: var(--color-subtle);
  line-height: 1.45;
}

.estimate-hyp--compact li {
  margin-bottom: 0.15rem;
}

.detail-narrative {
  padding-top: 0.25rem;
  border-top: 1px solid var(--color-border);
}

.detail-narrative p {
  margin: 0 0 0.85rem;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.detail-narrative p:last-child {
  margin-bottom: 0;
}

.detail-narrative strong {
  color: var(--color-text);
  font-weight: 600;
}

/* Detail panel */
.panel--detail {
  border-color: #a8dcc0;
  box-shadow: var(--shadow-soft);
}

.detail-header {
  margin-bottom: 1rem;
}

.detail-header h2 {
  margin: 0.75rem 0 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-green-dark);
}

.detail-logic {
  margin: 0 0 1.25rem;
  padding: 1rem 1.15rem;
  font-size: 0.9375rem;
  font-weight: 500;
  font-style: normal;
  color: var(--color-green-dark);
  background: linear-gradient(135deg, var(--color-accent-soft) 0%, var(--color-green-mid-soft) 100%);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-green-dark);
}

.detail-body p {
  margin: 0 0 0.85rem;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.detail-body p:last-child {
  margin-bottom: 0;
}

.detail-body strong {
  color: var(--color-text);
  font-weight: 600;
}

.detail-body ul {
  margin: 0.5rem 0 0;
  padding-left: 1.25rem;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.detail-body li {
  margin-bottom: 0.4rem;
  line-height: 1.55;
}

.detail-body li::marker {
  color: var(--color-green-text);
}

/* Recommendation */
.panel--reco {
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
}

.reco-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.reco-list li {
  position: relative;
  padding: 1.1rem 1.25rem 1.1rem 3rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
  counter-increment: reco;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.reco-list {
  counter-reset: reco;
}

.reco-list li::before {
  content: counter(reco);
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-brand-dark);
  background: var(--color-lime);
  border-radius: 50%;
}

.reco-list li:hover {
  border-color: #a8dcc0;
  box-shadow: var(--shadow-card);
  background: var(--color-accent-soft);
}

.reco-list strong {
  color: var(--color-green-dark);
  font-weight: 600;
}

/* Footer CTA */
.cta-footer {
  margin-top: 2rem;
  padding: 0 1.5rem 3rem;
}

.cta-footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 2.5rem 2rem;
  text-align: center;
  background: var(--color-brand-dark);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(200, 255, 87, 0.12);
}

.cta-footer__title {
  margin: 0 0 0.35rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.02em;
}

.cta-footer__sub {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-lime);
}

/* Exercice 2 */
.section-intro {
  margin: 0 0 1.25rem;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.section-note {
  margin: 1rem 0 0;
  font-size: 0.8125rem;
  color: var(--color-subtle);
}

.criteria--simple .card-mini {
  text-align: center;
}

.criteria--simple .card-mini strong {
  font-size: 1rem;
}

.schema-figure {
  margin: 0 0 1.25rem;
  padding: 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.schema-figure__img {
  display: block;
  width: 100%;
  height: auto;
}

/* Exercice 2 */
.page-ex2 .hero .lead {
  max-width: 36rem;
}

.ex2-plan {
  padding: 1rem 1.25rem;
}

.ex2-plan__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.ex2-plan__link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-green-dark);
  text-decoration: none;
}

.ex2-plan__link:hover {
  text-decoration: underline;
}

.ex2-block__head {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

.ex2-block__num {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-green-dark);
  background: var(--color-accent-soft);
  border-radius: var(--radius-pill);
  border: 1px solid #d4ebe0;
}

.ex2-block__head h2 {
  margin: 0;
  font-size: 1.15rem;
}

.ex2-hint {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  color: var(--color-muted);
  font-weight: 400;
}

.ex2-plain {
  margin: 0 0 0.75rem;
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.55;
}

.ex2-plain--note {
  padding: 0.85rem 1rem;
  background: var(--color-accent-soft);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-green-dark);
  margin-bottom: 1.25rem;
}

.kpi-block {
  margin-bottom: 1.25rem;
}

.kpi-block:last-child {
  margin-bottom: 0;
}

.kpi-block__title {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-green-dark);
}

.ex2-kpi-table td:nth-child(2),
.ex2-kpi-table th:nth-child(2) {
  white-space: nowrap;
}

.ex3-assumptions {
  margin: 0 0 1rem;
}

.ex3-kpi-wrap {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.ex3-edge {
  display: grid;
  gap: 0.35rem 1.5rem;
}

@media (min-width: 640px) {
  .ex3-edge {
    grid-template-columns: repeat(2, 1fr);
  }
}

.diag-sheet {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.diag-sheet__row {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 0.75rem 1rem;
  align-items: start;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
}

.diag-sheet__row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.diag-sheet__row:first-child {
  padding-top: 0;
}

.diag-sheet dt {
  margin: 0;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-subtle);
  padding-top: 0.2rem;
}

.diag-sheet dd {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.diag-sheet__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.diag-chip {
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.diag-sheet__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.diag-sheet__list li {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.4;
  padding-left: 0.85rem;
  position: relative;
}

.diag-sheet__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-green-text);
}

.ex2-verdict {
  margin-bottom: 1rem;
}

.ex2-tools-table td:first-child {
  white-space: nowrap;
}

.ex2-schema {
  margin: 1.25rem 0 0;
}

.ex2-sub {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.ex2-sub__title {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: var(--color-green-dark);
}

.ex2-personas {
  margin-bottom: 1rem;
}

.panel--detail-nested {
  margin-top: 1rem;
  box-shadow: none;
  border: 1px solid var(--color-border);
}

.panel--detail-nested .detail-header h3 {
  margin: 0;
  font-size: 1.1rem;
}

.bullet-list--tight {
  gap: 0.5rem;
}

.flow-steps {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.flow-step {
  flex: 1 1 7.5rem;
  max-width: 10.5rem;
  padding: 0.85rem 0.75rem;
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
  font: inherit;
  color: inherit;
}

.flow-step:hover {
  border-color: #a8dcc0;
  background: var(--color-accent-soft);
}

.flow-step.is-active {
  border-color: var(--color-green-dark);
  background: var(--color-green-mid-soft);
  box-shadow: 0 0 0 2px rgba(26, 95, 74, 0.12);
}

.flow-step__num {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-subtle);
  margin-bottom: 0.25rem;
}

.flow-step__title {
  display: block;
  font-size: 0.875rem;
  color: var(--color-green-dark);
  margin-bottom: 0.2rem;
}

.flow-step__tool {
  display: block;
  font-size: 0.7rem;
  color: var(--color-muted);
  line-height: 1.35;
}

.flow-sep {
  flex: 0 0 auto;
  align-self: center;
  width: 0.5rem;
  height: 0.5rem;
  border-top: 2px solid var(--color-green-text);
  border-right: 2px solid var(--color-green-text);
  transform: rotate(45deg);
  opacity: 0.55;
  margin: 0 0.1rem;
}

.flow-detail__lead {
  margin: 0 0 0.85rem;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
}

.flow-detail__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-bottom: 1rem;
}

.flow-detail__tool {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-green-dark);
}

.flow-detail__body {
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.6;
}

.flow-detail__body p {
  margin: 0 0 0.65rem;
}

.flow-detail__body p:last-child {
  margin-bottom: 0;
}

.flow-detail__points {
  margin: 1rem 0 0;
  padding-left: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--color-text);
}

.panel--quality .section-intro {
  margin-bottom: 1rem;
}

.quality-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .quality-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .quality-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.quality-card {
  padding: 1rem 1.1rem;
  background: #fef8f8;
  border: 1px solid #f0d4d4;
  border-radius: var(--radius-md);
}

.quality-card h3 {
  margin: 0 0 0.4rem;
  font-size: 0.875rem;
  color: #9b2c2c;
}

.quality-card p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-muted);
  line-height: 1.5;
}

@media (max-width: 720px) {
  .flow-steps {
    flex-direction: column;
    align-items: stretch;
  }

  .flow-step {
    max-width: none;
  }

  .flow-sep {
    transform: rotate(135deg);
    margin: 0 auto;
  }
}

/* Exercice 3 */
.callout {
  margin: 0 0 1rem;
  padding: 1rem 1.15rem;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.55;
  color: var(--color-green-dark);
  background: var(--color-accent-soft);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-green-dark);
}

.callout--lime {
  background: linear-gradient(135deg, #f4fce8 0%, var(--color-accent-soft) 100%);
  border-left-color: var(--color-lime);
}

.hyp-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hyp-list li {
  padding: 1rem 1.1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.hyp-list strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
  color: var(--color-green-dark);
}

.hyp-list span {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.calc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--color-surface);
}

.calc-table th,
.calc-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.calc-table th {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-subtle);
  background: var(--color-bg);
}

.calc-table td:last-child,
.calc-table th:last-child {
  text-align: right;
}

.calc-table__total td {
  background: var(--color-accent-soft);
  color: var(--color-green-dark);
  font-weight: 600;
  border-bottom: none;
}

.level-stack {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.level-card {
  padding: 1rem 1.15rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.level-card--hard {
  background: var(--color-green-mid-soft);
  border-color: #a8dcc0;
}

.level-card h3 {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  color: var(--color-green-dark);
}

.level-card ul {
  margin: 0;
  padding-left: 1.15rem;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.level-card li {
  margin-bottom: 0.25rem;
}

.bullet-list {
  margin: 0;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.bullet-list strong {
  color: var(--color-green-dark);
}

.bullet-list--compact {
  margin-top: 1.25rem;
  gap: 0.5rem;
}

.numbered-list {
  margin: 0;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.numbered-list strong {
  color: var(--color-text);
}

.arch-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.arch-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.arch-box {
  padding: 1rem 1.1rem;
  background: var(--color-accent-soft);
  border: 1px solid #d4ebe0;
  border-radius: var(--radius-md);
  min-width: 8.5rem;
  text-align: center;
}

.arch-box strong {
  display: block;
  font-size: 0.9rem;
  color: var(--color-green-dark);
  margin-bottom: 0.25rem;
}

.arch-box--core {
  background: var(--color-green-mid-soft);
  border-color: #a8dcc0;
}

.arch-box--hub {
  background: var(--color-surface);
}

.arch-box--small strong {
  font-size: 0.78rem;
}

.arch-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-subtle);
  margin-bottom: 0.35rem;
}

.arch-desc {
  font-size: 0.75rem;
  color: var(--color-muted);
}

.arch-arrow {
  font-size: 1.25rem;
  color: var(--color-green-text);
  font-weight: 700;
}

.logic-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .logic-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .logic-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.logic-card {
  padding: 1.15rem 1.25rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.logic-card h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  color: var(--color-green-dark);
}

.logic-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.55;
}

.logic-card--highlight {
  background: var(--color-green-mid-soft);
  border-color: #a8dcc0;
}

.kpi-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.kpi-tag {
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-green-dark);
  border: 1px solid #d4ebe0;
}

@media (max-width: 720px) {
  .arch-flow {
    flex-direction: column;
  }

  .arch-arrow {
    transform: rotate(90deg);
  }
}

/* Responsive table */
@media (max-width: 720px) {
  .prio-table th:nth-child(n + 3):not(:last-child),
  .prio-table td:nth-child(n + 3):not(:last-child):not(:nth-child(7)) {
    display: none;
  }

  .prio-table th.col-score,
  .prio-table td.score {
    display: table-cell;
  }

  .chips {
    display: none;
  }
}

@media print {
  .site-header {
    position: static;
  }

  body {
    background: #fff;
  }

  .panel--fade {
    opacity: 1;
    transform: none;
  }

  .panel:hover {
    box-shadow: none;
  }
}