/* ═══════════════════════════════════════════════════════════
   PRDL STUDIO — Case Study Styles
   Complète style.css · Jamais en conflit
═══════════════════════════════════════════════════════════ */

/* ─── CS HERO ────────────────────────────────────────────── */
.cs-hero {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 64px;
  background: linear-gradient(150deg, rgba(38,255,0,0.14) 0%, rgba(38,255,0,0.05) 40%, var(--white) 70%);
  max-width: var(--max-width);
  margin: 90px auto 0;
  padding: 120px 80px 80px;
  border-radius: var(--radius-xl);
}

/* ─── HERO — dégradés par projet ─────────────────────────── */
.cs-hero--blue   { background: linear-gradient(150deg, rgba(56,189,248,0.14) 0%, rgba(56,189,248,0.04) 40%, var(--white) 70%); }
.cs-hero--green  { background: linear-gradient(150deg, rgba(34,197,94,0.14) 0%, rgba(34,197,94,0.04) 40%, var(--white) 70%); }
.cs-hero--coral  { background: linear-gradient(150deg, rgba(251,113,133,0.14) 0%, rgba(251,113,133,0.04) 40%, var(--white) 70%); }
.cs-hero--purple { background: linear-gradient(150deg, rgba(167,139,250,0.16) 0%, rgba(167,139,250,0.05) 40%, var(--white) 70%); }
.cs-hero--teal   { background: linear-gradient(150deg, rgba(0,202,149,0.16) 0%, rgba(0,202,149,0.05) 40%, var(--white) 70%); }
.cs-hero--indigo { background: linear-gradient(150deg, rgba(37,99,235,0.14) 0%, rgba(37,99,235,0.04) 40%, var(--white) 70%); }

.cs-hero-inner {
  flex: 1;
  min-width: 0;
}

.cs-hero-img {
  flex: 0 0 560px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,0.12);
}

.cs-hero-img img {
  width: 100%;
  height: auto;
  display: block;
}

.cs-hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.cs-hero-title {
  font-family: var(--font-sans);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 300;
  color: var(--black);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-5);
}

.cs-hero-sub {
  font-size: 17px;
  color: var(--gray-text);
  line-height: 1.7;
  max-width: 600px;
  margin-bottom: var(--space-8);
}

.cs-hero-stats {
  display: flex;
  gap: 0;
  border-top: 0.5px solid var(--gray-border);
  padding-top: var(--space-6);
  flex-wrap: wrap;
}

.cs-hero-stat {
  flex: 1;
  min-width: 130px;
  padding: var(--space-5) var(--space-6) 0 0;
}

.cs-hero-stat-value {
  font-size: 28px;
  font-weight: 300;
  color: var(--black);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 6px;
}
.cs-hero-stat-value span { color: var(--accent); }

.cs-hero-stat-label {
  font-size: 12px;
  color: var(--gray-text);
  letter-spacing: 0.04em;
}

/* ─── SECTIONS ───────────────────────────────────────────── */
.cs-section {
  padding: 80px 0;
  max-width: var(--max-width);
  margin: var(--space-6) auto 0;
}

.cs-section--surface {
  background: var(--gray-surface);
  border-radius: var(--radius-xl);
  padding: 80px;
}

.cs-section--dark {
  background: var(--gray-surface);
  border-radius: var(--radius-xl);
  padding: 80px;
}
.cs-section--dark { border: none; }

.cs-section-inner {
  max-width: 100%;
}

/* Supprime le padding inner quand la section gère déjà son padding */
.cs-section--surface .cs-section-inner,
.cs-section--dark .cs-section-inner {
  padding: 0;
}

.cs-title {
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: var(--space-5);
  color: var(--black);
}
.cs-title--light { color: #ffffff; }

.cs-text {
  font-size: 15px;
  color: var(--gray-text);
  line-height: 1.8;
  max-width: 640px;
  margin-bottom: var(--space-4);
}
.cs-text--light { color: rgba(255,255,255,0.5); }

.cs-section--dark .section-label { color: rgba(255,255,255,0.38); }

/* ─── STAT CARDS (fond blanc/surface) ────────────────────── */
.cs-stat-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: var(--space-7);
}
.cs-stat-card {
  background: var(--gray-surface);
  border: 0.5px solid var(--gray-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  text-align: center;
}
.cs-stat-card-value {
  font-size: 36px;
  font-weight: 300;
  letter-spacing: -0.04em;
  color: var(--black);
  margin-bottom: 6px;
}
.cs-stat-card-value span { color: var(--accent); }
.cs-stat-card-label {
  font-size: 12px;
  color: var(--gray-text);
  letter-spacing: 0.03em;
}

.cs-stat-cards--4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ─── METRIC CARDS (fond sombre) ─────────────────────────── */
.cs-metric-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: var(--space-7);
}
.cs-metric-card {
  background: var(--gray-surface);
  border: 0.5px solid var(--gray-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  text-align: center;
}
.cs-metric-card-value {
  font-size: 36px;
  font-weight: 300;
  letter-spacing: -0.04em;
  color: #ffffff;
  margin-bottom: 6px;
}
.cs-metric-card-value span { color: var(--accent); }
.cs-metric-card-label {
  font-size: 12px;
  color: rgba(255,255,255,0.38);
  letter-spacing: 0.03em;
}
.cs-metric-note {
  font-size: 13px;
  color: rgba(255,255,255,0.28);
  text-align: center;
  margin-top: var(--space-5);
  letter-spacing: 0.02em;
}

/* ─── STEPS (5 colonnes) ─────────────────────────────────── */
.cs-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-top: var(--space-7);
}
.cs-step {
  background: var(--white);
  border: 0.5px solid var(--gray-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: border-color var(--fast), transform var(--fast);
}
.cs-step:hover {
  border-color: rgba(38,255,0,0.25);
  transform: translateY(-2px);
}
.cs-step--active {
  background: #0A0A0A;
  border: 1.5px solid var(--accent);
}
.cs-step--active:hover {
  border-color: var(--accent);
}
.cs-step-num {
  font-size: 11px;
  font-weight: 600;
  color: var(--gray-text);
  letter-spacing: 0.1em;
}
.cs-step--active .cs-step-num { color: var(--accent); }
.cs-step-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--black);
  line-height: 1.25;
}
.cs-step--active .cs-step-title { color: #ffffff; }
.cs-step-desc {
  font-size: 12px;
  color: var(--gray-text);
  line-height: 1.6;
  flex: 1;
}
.cs-step--active .cs-step-desc { color: rgba(255,255,255,0.45); }
.cs-step-badge {
  font-size: 10px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: var(--space-2);
}

/* ─── DECISIONS GRID (3 colonnes × 2 rangées) ────────────── */
.cs-decisions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: var(--space-7);
}
.cs-decisions-grid--2col {
  grid-template-columns: repeat(2, 1fr);
}
.cs-decision-card {
  background: var(--white);
  border: 0.5px solid var(--gray-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color var(--fast), transform var(--fast);
}
.cs-decision-card:hover {
  border-color: rgba(38,255,0,0.2);
  transform: translateY(-2px);
}
.cs-decision-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  flex-shrink: 0;
}
.cs-decision-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--black);
  line-height: 1.35;
}
.cs-decision-text {
  font-size: 13px;
  font-weight: 400;
  color: var(--gray-text);
  line-height: 1.65;
  flex: 1;
}

/* ─── DECISIONS ROW (5 colonnes) ─────────────────────────── */
.cs-decisions-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-top: var(--space-7);
}

/* ─── CHANTIERS (2×2) ────────────────────────────────────── */
.cs-chantiers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: var(--space-7);
}
.cs-chantier {
  background: var(--white);
  border: 0.5px solid var(--gray-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: border-color var(--fast), transform var(--fast);
}
.cs-chantier:hover {
  border-color: rgba(38,255,0,0.2);
  transform: translateY(-2px);
}
.cs-chantier--active {
  background: #0A0A0A;
  border: 1.5px solid var(--accent);
}
.cs-chantier--active:hover {
  border-color: var(--accent);
}
.cs-chantier-num {
  font-size: 11px;
  font-weight: 600;
  color: var(--gray-text);
  letter-spacing: 0.1em;
}
.cs-chantier--active .cs-chantier-num { color: var(--accent); }
.cs-chantier-title {
  font-size: 20px;
  font-weight: 500;
  color: var(--black);
  line-height: 1.2;
}
.cs-chantier--active .cs-chantier-title { color: #ffffff; }
.cs-chantier-desc {
  font-size: 13px;
  color: var(--gray-text);
  line-height: 1.65;
  flex: 1;
}
.cs-chantier--active .cs-chantier-desc { color: rgba(255,255,255,0.45); }

/* ─── TIMELINE HORIZONTALE ───────────────────────────────── */
.cs-timeline {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  margin-top: var(--space-7);
  position: relative;
}
.cs-timeline::before {
  content: '';
  position: absolute;
  top: 18px;
  left: 18px;
  right: 18px;
  height: 0.5px;
  background: var(--gray-border);
  z-index: 0;
}
.cs-timeline-step {
  background: var(--white);
  border: 0.5px solid var(--gray-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  position: relative;
  z-index: 1;
  transition: border-color var(--fast), transform var(--fast);
}
.cs-timeline-step:hover {
  border-color: rgba(38,255,0,0.2);
  transform: translateY(-2px);
}
.cs-timeline-step--active {
  background: #0A0A0A;
  border: 1.5px solid var(--accent);
}
.cs-timeline-step--active:hover {
  border-color: var(--accent);
}
.cs-timeline-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gray-surface);
  border: 0.5px solid var(--gray-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--gray-text);
  margin-bottom: var(--space-2);
  flex-shrink: 0;
}
.cs-timeline-step--active .cs-timeline-num {
  background: var(--accent);
  border-color: var(--accent);
  color: #000000;
}
.cs-timeline-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--black);
  line-height: 1.35;
}
.cs-timeline-step--active .cs-timeline-title { color: #ffffff; }
.cs-timeline-desc {
  font-size: 11px;
  color: var(--gray-text);
  line-height: 1.55;
}
.cs-timeline-step--active .cs-timeline-desc { color: rgba(255,255,255,0.45); }

/* ─── SCREEN BLOCKS ──────────────────────────────────────── */
.cs-screens {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: var(--space-7);
}
.cs-screens--single {
  grid-template-columns: 1fr;
}
.cs-screen-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  background: var(--gray-surface);
  border: 0.5px solid var(--gray-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  overflow: hidden;
}
.cs-screen-pills {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.cs-screen-img {
  border-radius: var(--radius-md);
  overflow: hidden;
}
.cs-screen-img img {
  width: 100%;
  display: block;
  border-radius: var(--radius-md);
}
.cs-screen-caption {
  font-size: 13px;
  color: rgba(255,255,255,0.38);
  line-height: 1.6;
}

/* ─── VISUALS GRID (2×2) ─────────────────────────────────── */
.cs-visuals-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: var(--space-7);
}
.cs-visual-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.cs-visual-label {
  font-size: 12px;
  font-weight: 500;
  color: rgba(255,255,255,0.38);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ─── IMAGE PLACEHOLDER ──────────────────────────────────── */
.img-placeholder {
  background: #111111;
  border: 0.5px solid #222222;
  border-radius: var(--radius-md);
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-family: var(--font-sans);
  color: rgba(255,255,255,0.18);
  letter-spacing: 0.04em;
}

/* ─── FOOTER NAV ─────────────────────────────────────────── */
.cs-footer-nav {
  padding: var(--space-8) 0;
  border-top: 0.5px solid var(--gray-border);
  margin-top: var(--space-6);
}
.cs-footer-nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-7);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.cs-footer-nav-back {
  font-size: 13px;
  color: var(--gray-text);
  transition: color var(--fast);
}
.cs-footer-nav-back:hover { color: var(--black); }
.cs-footer-nav-next {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  text-align: right;
}
.cs-footer-nav-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-text);
}
.cs-footer-nav-title {
  font-size: 20px;
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--black);
  transition: color var(--fast);
}
.cs-footer-nav-title:hover { color: var(--accent); }
.cs-footer-nav-sub {
  font-size: 12px;
  color: var(--gray-text);
}

/* ─── RESPONSIVE ─────────────────────────────────────────── */

/* Page margins — blocs qui touchent le bord sous 1440px */
@media (max-width: 1440px) {
  .cs-hero             { margin-left: 20px; margin-right: 20px; }
  .cs-section          { margin-left: 20px; margin-right: 20px; }
  .cs-section--surface,
  .cs-section--dark    { margin-left: 20px; margin-right: 20px; }
  .cs-footer-nav-inner { padding-left: 20px; padding-right: 20px; }
}

@media (max-width: 1024px) {
  .cs-hero             { padding: 140px 48px 60px; gap: 40px; }
  .cs-hero-img         { flex: 0 0 400px; }
  .cs-section--surface,
  .cs-section--dark    { padding: 60px 48px; }
  .cs-steps            { grid-template-columns: repeat(3, 1fr); }
  .cs-timeline         { grid-template-columns: repeat(3, 1fr); }
  .cs-decisions-row    { grid-template-columns: repeat(3, 1fr); }
  .cs-metric-cards     { grid-template-columns: repeat(2, 1fr); }
  .cs-stat-cards--4    { grid-template-columns: repeat(2, 1fr); }
  .cs-timeline::before { display: none; }
}

@media (max-width: 768px) {
  .cs-hero             { flex-direction: column; padding: 80px 24px 48px; margin-top: 0; border-radius: var(--radius-xl); gap: 32px; }
  .cs-hero-img         { flex: none; width: 100%; }
  .cs-section          { padding: 48px 0; }
  .cs-section--surface,
  .cs-section--dark    { padding: 48px 24px; border-radius: var(--radius-lg); }
  .cs-steps         { grid-template-columns: 1fr 1fr; }
  .cs-chantiers-grid { grid-template-columns: 1fr; }
  .cs-decisions-grid { grid-template-columns: 1fr 1fr; }
  .cs-decisions-grid--2col { grid-template-columns: 1fr; }
  .cs-decisions-row  { grid-template-columns: 1fr 1fr; }
  .cs-screens        { grid-template-columns: 1fr; }
  .cs-visuals-grid   { grid-template-columns: 1fr; }
  .cs-timeline       { grid-template-columns: 1fr 1fr; }
  .cs-metric-cards   { grid-template-columns: 1fr 1fr; }
  .cs-stat-cards     { grid-template-columns: 1fr 1fr; }
  .cs-stat-cards--4  { grid-template-columns: 1fr 1fr; }
  .cs-footer-nav-inner {
    flex-direction: column;
    gap: var(--space-6);
    align-items: flex-start;
  }
  .cs-footer-nav-next {
    align-items: flex-start;
    text-align: left;
  }
}

@media (max-width: 480px) {
  .cs-steps          { grid-template-columns: 1fr; }
  .cs-timeline       { grid-template-columns: 1fr; }
  .cs-decisions-row  { grid-template-columns: 1fr; }
  .cs-decisions-grid { grid-template-columns: 1fr; }
  .cs-hero-stats     { flex-direction: column; gap: var(--space-4); }
}