/* ══════════════════════════════════════════════
   RESET & BASE
   ══════════════════════════════════════════════ */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: 'Satoshi', sans-serif; color: #0A0A0A; background: #FFFFFF; font-size: 15px; line-height: 1.6; }

/* ══════════════════════════════════════════════
   NAV
   ══════════════════════════════════════════════ */

nav { position: sticky; top: 0; z-index: 10; background: #FFFFFF; border-bottom: 1px solid #E8E8E8; }
.nav-inner { padding: 0 48px; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav-brand { text-decoration: none; color: #0A0A0A; }
.nav-brand-name { font-size: 12px; font-weight: 800; letter-spacing: 3px; text-transform: uppercase; }
.nav-brand-title { font-size: 10px; color: #AAAAAA; letter-spacing: 2px; text-transform: uppercase; margin-top: 1px; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { font-size: 11px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; text-decoration: none; color: #AAAAAA; transition: color 0.15s; }
.nav-links a:hover, .nav-links a.active { color: #0A0A0A; }

/* ══════════════════════════════════════════════
   HERO (pages UC)
   ══════════════════════════════════════════════ */

.hero { padding: 80px 48px 72px; display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.hero-eyebrow { font-size: 11px; font-weight: 600; letter-spacing: 2.5px; text-transform: uppercase; color: #AAAAAA; margin-bottom: 20px; }
.hero h1 { font-size: clamp(44px, 4.5vw, 68px); font-weight: 900; letter-spacing: -2.5px; text-transform: uppercase; line-height: 0.95; }
.hero-accroche { font-size: 17px; line-height: 1.65; color: #444444; margin-bottom: 32px; }
.hero-stats { display: flex; gap: 40px; margin-top: 32px; }
.hero-stat-num { font-size: 32px; font-weight: 900; letter-spacing: -1px; color: #0A0A0A; line-height: 1; }
.hero-stat-label { font-size: 11px; color: #AAAAAA; letter-spacing: 1.5px; text-transform: uppercase; margin-top: 4px; }

/* ══════════════════════════════════════════════
   HERO INDEX (specifique index.html)
   ══════════════════════════════════════════════ */

.page { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }
.page nav { position: static; }
.page .nav-inner { max-width: none; padding: 0 48px; }
.page footer { padding-left: 48px; padding-right: 48px; }
.hero-pitch { font-size: 16px; line-height: 1.7; color: #444444; margin-bottom: 0; }
.hero-pitch + .hero-pitch { margin-top: 14px; }
.hero-pitch a { color: #0A0A0A; font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.hero-ctas { display: flex; gap: 20px; margin-top: 20px; }
.hero-cta { font-size: 11px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; text-decoration: none; color: #0A0A0A; border-bottom: 1px solid #0A0A0A; padding-bottom: 2px; transition: opacity 0.15s; }
.hero-cta:hover { opacity: 0.4; }

/* ══════════════════════════════════════════════
   HERO COVER — INDEX (nouveau layout full-width)
   ══════════════════════════════════════════════ */

.hero-cover { flex: 1; display: flex; flex-direction: column; justify-content: flex-start; padding: 36px 48px 40px; min-height: 0; }
.hero-cover-h1 { font-size: clamp(56px, 7.2vw, 104px); font-weight: 900; letter-spacing: -4px; text-transform: uppercase; line-height: 0.92; color: #0A0A0A; margin: 0; }
.hero-cover-foot { display: flex; justify-content: flex-start; align-items: flex-start; gap: 48px; margin-top: auto; margin-bottom: auto; }
.hero-cover-pitch { font-size: 15px; line-height: 1.6; color: #555555; max-width: 700px; }
.hero-cover-sub { font-size: 14px; line-height: 1.6; color: #555555; max-width: 700px; }
.hero-cover-sub strong { color: #0A0A0A; }
.hero-cover-ctas { display: flex; gap: 24px; margin-top: 20px; }
.hero-cover-ctas a { font-size: 12px; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; color: #0A0A0A; text-decoration: none; border-bottom: 1px solid #0A0A0A; padding-bottom: 2px; transition: opacity 0.15s; }
.hero-cover-ctas a:hover { opacity: 0.4; }

/* ══════════════════════════════════════════════
   UC STRIP — INDEX (bande 7 use cases)
   ══════════════════════════════════════════════ */

.uc-strip { display: grid; grid-template-columns: repeat(7, 1fr); border-top: 1px solid #0A0A0A; flex-shrink: 0; }
.ucs-card { display: flex; flex-direction: column; justify-content: space-between; padding: 18px 20px 22px; border-right: 1px solid #E8E8E8; text-decoration: none; color: #0A0A0A; transition: background 0.13s ease; min-height: 150px; }
.ucs-card:last-child { border-right: none; }
.ucs-card:hover { background: #0A0A0A; }
.ucs-card-top { display: flex; flex-direction: column; gap: 8px; }
.ucs-num { font-size: 11px; font-weight: 600; letter-spacing: 2px; color: #AAAAAA; transition: color 0.13s ease; }
.ucs-card:hover .ucs-num { color: rgba(255,255,255,0.35); }
.ucs-tag { font-size: 10px; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; color: #AAAAAA; transition: color 0.13s ease; }
.ucs-card:hover .ucs-tag { color: rgba(255,255,255,0.45); }
.ucs-title { font-size: clamp(11px, 1vw, 14px); font-weight: 900; text-transform: uppercase; letter-spacing: -0.3px; line-height: 1.25; color: #0A0A0A; transition: color 0.13s ease; }
.ucs-card:hover .ucs-title { color: #FFFFFF; }
.ucs-arrow { font-size: 14px; color: #CCCCCC; transition: color 0.13s ease, transform 0.13s ease; align-self: flex-end; }
.ucs-card:hover .ucs-arrow { color: #FFFFFF; transform: translateX(3px); }

/* ══════════════════════════════════════════════
   TABS
   ══════════════════════════════════════════════ */

.tabs { position: sticky; top: 64px; z-index: 9; background: #FFFFFF; border-top: 1px solid #E8E8E8; border-bottom: 1px solid #E8E8E8; }
.tabs-inner { padding: 0 48px; display: flex; }
.tab { font-family: 'Satoshi', sans-serif; font-size: 11px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: #AAAAAA; background: transparent; border: none; border-bottom: 2px solid transparent; padding: 16px 20px; cursor: pointer; transition: color 0.15s, border-color 0.15s; }
.tab:hover { color: #0A0A0A; }
.tab.active { color: #0A0A0A; border-bottom: 2px solid #4A7C59; }

/* ══════════════════════════════════════════════
   CASE STUDIES (pages UC)
   ══════════════════════════════════════════════ */

.cases { }
.case { display: none; grid-template-columns: 1fr 1fr; min-height: 480px; border-bottom: 1px solid #E8E8E8; }
.case.active { display: grid; }
.case:last-child { border-bottom: none; }
.case:nth-child(even) .case-visual { order: 2; }
.case:nth-child(even) .case-content { order: 1; }

.case-visual { background: #0A0A0A; display: flex; flex-direction: column; justify-content: space-between; padding: 52px 48px; position: relative; overflow: hidden; }
.case-visual-num { font-size: 140px; font-weight: 900; color: rgba(255,255,255,0.06); line-height: 1; position: absolute; bottom: -16px; right: -8px; letter-spacing: -6px; user-select: none; }
.case-method { font-size: 11px; font-weight: 700; letter-spacing: 3px; text-transform: uppercase; color: rgba(255,255,255,0.4); }
.case-impact-block { position: relative; z-index: 1; }
.case-impact-num { font-size: clamp(56px, 6vw, 88px); font-weight: 900; letter-spacing: -3px; color: #FFFFFF; line-height: 1; }
.case-impact-label { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 8px; line-height: 1.3; }

.case-content { padding: 52px 48px; display: flex; flex-direction: column; justify-content: space-between; border-left: 1px solid #E8E8E8; }
.case:nth-child(even) .case-content { border-left: none; border-right: 1px solid #E8E8E8; }
.case-content-top { display: flex; flex-direction: column; }
.case-tag { font-size: 10px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: #AAAAAA; margin-bottom: 20px; }
.case-title { font-size: clamp(28px, 2.8vw, 40px); font-weight: 900; letter-spacing: -1px; text-transform: uppercase; line-height: 1.05; margin-bottom: 24px; }
.case-desc { font-size: 15px; color: #555555; line-height: 1.65; max-width: 440px; margin-bottom: 32px; }

/* ══════════════════════════════════════════════
   CONTENT LABEL (sous-titre de section dans case-content)
   ══════════════════════════════════════════════ */

.content-label { font-size: 12px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: #AAAAAA; margin-bottom: 12px; }

/* ══════════════════════════════════════════════
   CASE LEARNING
   ══════════════════════════════════════════════ */

.case-learning { border-left: 2px solid #4A7C59; padding: 12px 18px; background: #F7F7F7; margin-bottom: 32px; border-radius: 2px; }
.case-learning-label { font-size: 10px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: #AAAAAA; margin-bottom: 5px; }
.case-learning-text { font-size: 14px; font-weight: 700; color: #0A0A0A; line-height: 1.35; }

/* ══════════════════════════════════════════════
   CASE LINK
   ══════════════════════════════════════════════ */

.case-link { display: inline-flex; align-items: center; gap: 10px; font-size: 11px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: #0A0A0A; text-decoration: none; border-bottom: 1px solid #0A0A0A; padding-bottom: 2px; transition: opacity 0.15s; align-self: flex-start; margin-top: auto; }
.case-link:hover { opacity: 0.4; }

/* ══════════════════════════════════════════════
   SECTIONS GRID
   ══════════════════════════════════════════════ */

.sections-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: #E8E8E8; border: 1px solid #E8E8E8; margin-bottom: 28px; }
.section-item { background: #FFFFFF; padding: 16px 20px; display: flex; gap: 14px; align-items: flex-start; transition: background 0.15s; }
.section-item:hover { background: #F7F7F7; }
.section-rank { font-size: 10px; font-weight: 800; letter-spacing: 2px; color: #4A7C59; padding-top: 2px; flex-shrink: 0; }
.section-name { font-size: 12px; font-weight: 700; letter-spacing: 0.5px; text-transform: uppercase; color: #0A0A0A; margin-bottom: 4px; }
.section-desc { font-size: 13px; color: #888888; line-height: 1.5; }

/* ══════════════════════════════════════════════
   BUILD STEPS
   ══════════════════════════════════════════════ */

.build-steps { display: flex; flex-direction: column; gap: 1px; background: #E8E8E8; border: 1px solid #E8E8E8; margin-bottom: 28px; }
.build-step { background: #FFFFFF; padding: 18px 20px; display: flex; gap: 20px; align-items: flex-start; transition: background 0.15s; }
.build-step:hover { background: #F7F7F7; }
.build-step-tool { font-size: 10px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; color: #FFFFFF; background: #0A0A0A; padding: 4px 10px; border-radius: 2px; flex-shrink: 0; margin-top: 2px; white-space: nowrap; }
.build-step-tool.green { background: #4A7C59; }
.build-step-body { flex: 1; }
.build-step-title { font-size: 13px; font-weight: 700; color: #0A0A0A; margin-bottom: 3px; }
.build-step-desc { font-size: 13px; color: #888888; line-height: 1.5; }

/* ══════════════════════════════════════════════
   WORKFLOW STEPS
   ══════════════════════════════════════════════ */

.workflow-steps { display: flex; flex-direction: column; gap: 1px; background: #E8E8E8; border: 1px solid #E8E8E8; margin-top: 28px; margin-bottom: 28px; }
.workflow-step { background: #FFFFFF; padding: 14px 20px; display: flex; gap: 16px; align-items: center; transition: background 0.15s; }
.workflow-step:hover { background: #F7F7F7; }
.workflow-num { font-size: 10px; font-weight: 800; letter-spacing: 2px; color: #4A7C59; flex-shrink: 0; min-width: 24px; }
.workflow-text { font-size: 13px; color: #444444; line-height: 1.5; }
.workflow-text strong { color: #0A0A0A; font-weight: 700; }

/* ══════════════════════════════════════════════
   DECISIONS
   ══════════════════════════════════════════════ */

.decisions-list { display: flex; flex-direction: column; gap: 1px; background: #E8E8E8; border: 1px solid #E8E8E8; margin-bottom: 28px; }
.decision-item { background: #FFFFFF; padding: 20px; display: flex; gap: 20px; align-items: flex-start; transition: background 0.15s; }
.decision-item:hover { background: #F7F7F7; }
.decision-num { font-size: 10px; font-weight: 800; letter-spacing: 2px; color: #AAAAAA; padding-top: 3px; flex-shrink: 0; min-width: 20px; }
.decision-body { flex: 1; }
.decision-vs { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; flex-wrap: wrap; }
.decision-option { font-size: 11px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; padding: 3px 10px; border-radius: 2px; }
.decision-option.chosen { background: #0A0A0A; color: #FFFFFF; }
.decision-option.rejected { background: #F0F0F0; color: #AAAAAA; text-decoration: line-through; }
.decision-sep { font-size: 11px; color: #CCCCCC; font-weight: 700; }
.decision-why { font-size: 13px; color: #555555; line-height: 1.6; margin-bottom: 8px; }
.decision-consequence { font-size: 12px; color: #888888; line-height: 1.5; font-style: italic; border-top: 1px solid #F0F0F0; padding-top: 8px; margin-top: 4px; }
.decision-consequence strong { color: #0A0A0A; font-style: normal; font-weight: 700; }

/* ══════════════════════════════════════════════
   PROMPT VERSIONS
   ══════════════════════════════════════════════ */

.prompt-versions { display: flex; gap: 1px; background: #E8E8E8; border: 1px solid #E8E8E8; margin-bottom: 28px; }
.prompt-version { background: #FFFFFF; padding: 20px; flex: 1; transition: background 0.15s; }
.prompt-version:hover { background: #F7F7F7; }
.prompt-v-label { font-size: 10px; font-weight: 800; letter-spacing: 2px; text-transform: uppercase; color: #AAAAAA; margin-bottom: 8px; }
.prompt-v-num { font-size: 28px; font-weight: 900; letter-spacing: -1px; color: #0A0A0A; line-height: 1; margin-bottom: 8px; }
.prompt-v-num.active-v { color: #4A7C59; }
.prompt-v-desc { font-size: 13px; color: #888888; line-height: 1.5; }

/* ══════════════════════════════════════════════
   MODES GRID
   ══════════════════════════════════════════════ */

.modes-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: #E8E8E8; border: 1px solid #E8E8E8; margin-bottom: 32px; }
.mode-item { background: #FFFFFF; padding: 18px 20px; display: flex; gap: 14px; align-items: flex-start; transition: background 0.15s; }
.mode-item:hover { background: #F7F7F7; }
.mode-num { font-size: 10px; font-weight: 800; letter-spacing: 2px; color: #4A7C59; padding-top: 2px; flex-shrink: 0; }
.mode-name { font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: #0A0A0A; margin-bottom: 4px; }
.mode-desc { font-size: 13px; color: #888888; line-height: 1.5; }

/* ══════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════ */

footer { border-top: 1px solid #E8E8E8; height: 52px; padding: 0 48px; display: flex; align-items: center; justify-content: space-between; }
.footer-left { font-size: 11px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; color: #AAAAAA; text-decoration: none; transition: color 0.15s; }
.footer-left:hover { color: #0A0A0A; }
.footer-right { display: flex; gap: 28px; }
.footer-right a { font-size: 11px; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; color: #AAAAAA; text-decoration: none; transition: color 0.15s; }
.footer-right a:hover { color: #0A0A0A; }

/* ══════════════════════════════════════════════
   SCROLL TOP
   ══════════════════════════════════════════════ */

.scroll-top { position: fixed; bottom: 32px; right: 32px; width: 44px; height: 44px; background: #0A0A0A; color: #FFFFFF; border: none; cursor: pointer; font-size: 16px; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: opacity 0.2s, visibility 0.2s; border-radius: 2px; }
.scroll-top.visible { opacity: 1; visibility: visible; }

/* ══════════════════════════════════════════════
   BURGER / MOBILE NAV
   ══════════════════════════════════════════════ */

.burger { display: none; flex-direction: column; gap: 7px; cursor: pointer; background: none; border: none; padding: 4px; }
.burger-bar { display: block; width: 22px; height: 1.5px; background: #0A0A0A; }

.mobile-nav { position: fixed; inset: 0; background: #FFFFFF; z-index: 100; transform: translateX(100%); transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1); display: flex; flex-direction: column; padding: 28px 24px; }
.mobile-nav.open { transform: translateX(0); }
.mobile-nav-header { display: flex; justify-content: flex-end; margin-bottom: 40px; }
.mobile-nav-close { background: none; border: none; cursor: pointer; font-size: 32px; font-weight: 300; color: #0A0A0A; padding: 0; line-height: 1; }
.mobile-nav-links { display: flex; flex-direction: column; }
.mobile-nav-links a { font-size: 36px; font-weight: 900; letter-spacing: -1.5px; text-transform: uppercase; text-decoration: none; color: #CCCCCC; padding: 18px 0; border-bottom: 1px solid #E8E8E8; transition: color 0.15s; line-height: 1; }
.mobile-nav-links a:first-child { border-top: 1px solid #E8E8E8; }
.mobile-nav-links a:hover, .mobile-nav-links a.active { color: #0A0A0A; }
.mobile-nav-footer { margin-top: auto; padding-top: 32px; display: flex; gap: 24px; }
.mobile-nav-footer a { font-size: 11px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; color: #AAAAAA; text-decoration: none; transition: color 0.15s; }
.mobile-nav-footer a:hover { color: #0A0A0A; }

/* ══════════════════════════════════════════════
   MOBILE
   ══════════════════════════════════════════════ */

@media (max-width: 768px) {
    .nav-inner { padding: 0 24px; }
    .nav-links { display: none; }
    .burger { display: flex; }

    /* Hero UC */
    .hero { grid-template-columns: 1fr; padding: 48px 24px 40px; gap: 32px; }
    .hero-stats { gap: 24px; }

    /* Hero index — nouveau layout */
    .page { height: auto; overflow: visible; }
    .page .nav-inner { padding: 0 24px; }
    .page footer { padding-left: 24px; padding-right: 24px; }
    .hero-cover { padding: 32px 24px; flex: none; }
    .hero-cover-h1 { font-size: clamp(44px, 11vw, 64px); letter-spacing: -2px; }
    .hero-cover-pitch, .hero-cover-sub span { white-space: normal !important; }
    .hero-cover-foot { flex-direction: column; align-items: flex-start; gap: 20px; margin-top: 0; margin-bottom: 0; }
    .uc-strip { grid-template-columns: repeat(2, 1fr); border-top: 1px solid #0A0A0A; }
    .ucs-card { border-right: 1px solid #E8E8E8; border-bottom: 1px solid #E8E8E8; min-height: 120px; }
    .ucs-card:nth-child(2n) { border-right: none; }
    .ucs-title { font-size: 13px; }
    /* Tabs */
    .tabs-inner { padding: 0 24px; overflow-x: auto; }
    .tab { padding: 14px 16px; white-space: nowrap; }

    /* Cases */
    .case { grid-template-columns: 1fr; min-height: auto; }
    .case:nth-child(even) .case-visual { order: 1; }
    .case:nth-child(even) .case-content { order: 2; }
    .case-visual { min-height: 280px; padding: 36px 24px; }
    .case-visual-num { font-size: 96px; }
    .case-content { padding: 36px 24px; border-left: none !important; border-right: none !important; }

    /* UC3 grids */
    .sections-grid { grid-template-columns: 1fr; }
    .prompt-versions { flex-direction: column; }

    /* Modes grid */
    .modes-grid { grid-template-columns: 1fr; }

    /* Footer */
    footer { height: auto; padding: 20px 24px; flex-direction: column; gap: 12px; }
}