/* ==========================================================================
   CENELIS ACADEMY — DESIGN SYSTEM WEBAPP INSTITUTIONNEL (MINERAL PINE & COPPER)
   Zéro violet Livria · Zéro emoji brut · Responsive Desktop & Mobile
   ========================================================================== */

:root {
    --ca-bg: #F4F7F5;
    --ca-bg-elevated: #FFFFFF;
    --ca-bg-subtle: #EBF1EE;
    --ca-bg-muted: #E3ECE8;
    --ca-surface-glass: rgba(255, 255, 255, 0.88);
    --ca-ink: #0E1B17;
    --ca-ink-secondary: #3F544D;
    --ca-ink-muted: #687E76;
    --ca-border: #D6E2DC;
    --ca-border-strong: #B8CCC3;

    /* Couleur principale institutionnelle Cenelis : Pin Minéral Profond */
    --ca-pine: #145346;
    --ca-pine-hover: #0E3E34;
    --ca-pine-soft: #E6F2EE;
    --ca-pine-border: #B2D6CC;
    --ca-pine-ink: #0C3B31;

    /* Accent secondaire : Cuivre Ambré Chaleureux */
    --ca-copper: #B85D19;
    --ca-copper-hover: #964910;
    --ca-copper-soft: #FDF2E9;
    --ca-copper-border: #F0CFAF;

    /* Statuts sémantiques */
    --ca-info: #0369A1;
    --ca-info-soft: #E0F2FE;
    --ca-danger: #B91C1C;
    --ca-danger-soft: #FEF2F2;
    --ca-success: #15803D;
    --ca-success-soft: #DCFCE7;

    --ca-shadow-xs: 0 1px 2px rgba(14, 27, 23, 0.04);
    --ca-shadow-sm: 0 4px 12px rgba(14, 27, 23, 0.05), 0 1px 2px rgba(14, 27, 23, 0.04);
    --ca-shadow-md: 0 12px 28px rgba(14, 27, 23, 0.08), 0 2px 6px rgba(14, 27, 23, 0.04);
    --ca-shadow-lg: 0 24px 54px rgba(14, 27, 23, 0.14);

    --ca-radius-sm: 10px;
    --ca-radius-md: 14px;
    --ca-radius-lg: 20px;
    --ca-radius-xl: 26px;
    --ca-header-h: 68px;
}

[data-theme="dark"] {
    --ca-bg: #0A1210;
    --ca-bg-elevated: #111C19;
    --ca-bg-subtle: #162520;
    --ca-bg-muted: #1D302A;
    --ca-surface-glass: rgba(15, 26, 22, 0.88);
    --ca-ink: #ECF5F2;
    --ca-ink-secondary: #B4C8C1;
    --ca-ink-muted: #7F988F;
    --ca-border: #22362F;
    --ca-border-strong: #2F4B42;

    --ca-pine: #289E84;
    --ca-pine-hover: #34B598;
    --ca-pine-soft: rgba(40, 158, 132, 0.15);
    --ca-pine-border: rgba(40, 158, 132, 0.36);
    --ca-pine-ink: #6EE7CB;

    --ca-copper: #EA8B42;
    --ca-copper-hover: #F59E5B;
    --ca-copper-soft: rgba(234, 139, 66, 0.14);
    --ca-copper-border: rgba(234, 139, 66, 0.35);

    --ca-info: #38BDF8;
    --ca-info-soft: rgba(56, 189, 248, 0.14);
    --ca-danger: #F87171;
    --ca-danger-soft: rgba(248, 113, 113, 0.14);
    --ca-success: #4ADE80;
    --ca-success-soft: rgba(74, 222, 128, 0.14);

    --ca-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.25);
    --ca-shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.32);
    --ca-shadow-md: 0 14px 32px rgba(0, 0, 0, 0.45);
    --ca-shadow-lg: 0 26px 60px rgba(0, 0, 0, 0.65);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: clip;
}

body {
    margin: 0;
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--ca-bg);
    color: var(--ca-ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: clip;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

code, pre, kbd, .ca-mono {
    font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Consolas, monospace;
}

a {
    color: var(--ca-pine);
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
}

img {
    max-width: 100%;
    display: block;
}

/* ==========================================================================
   1. HEADER WEBAPP STICKY (ERGONOMIE TYPE LIVRIA HEADER)
   ========================================================================== */
.ca-header {
    position: sticky;
    top: 0;
    z-index: 900;
    height: var(--ca-header-h);
    background: var(--ca-surface-glass);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    border-bottom: 1px solid var(--ca-border);
}

.ca-header__inner {
    max-width: 1440px;
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.ca-brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    color: var(--ca-ink);
    flex-shrink: 0;
}

.ca-brand__mark {
    width: 38px;
    height: 38px;
    border-radius: 11px;
    background: linear-gradient(135deg, #145346 0%, #0D382F 100%);
    color: #FFFFFF;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(20, 83, 70, 0.25);
}

.ca-brand__mark svg {
    width: 21px;
    height: 21px;
}

.ca-brand__copy {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.ca-brand__eyebrow {
    font-size: 10.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--ca-pine);
}

.ca-brand__title {
    font-size: 16.5px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--ca-ink);
}

/* Segmented Mode Switcher */
.ca-mode-switch {
    display: inline-flex;
    align-items: center;
    background: var(--ca-bg-subtle);
    border: 1px solid var(--ca-border);
    padding: 4px;
    border-radius: 999px;
    gap: 4px;
}

.ca-mode-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: none;
    background: transparent;
    color: var(--ca-ink-secondary);
    font-size: 13.5px;
    font-weight: 700;
    padding: 7px 15px;
    border-radius: 999px;
    transition: all 0.18s ease;
    white-space: nowrap;
}

.ca-mode-btn svg {
    width: 17px;
    height: 17px;
    flex-shrink: 0;
}

.ca-mode-btn:hover {
    color: var(--ca-ink);
}

.ca-mode-btn.is-active {
    background: var(--ca-bg-elevated);
    color: var(--ca-pine);
    box-shadow: var(--ca-shadow-xs);
}

.ca-mode-pill-count {
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 999px;
    background: var(--ca-pine-soft);
    color: var(--ca-pine-ink);
}

.ca-mode-btn:not(.is-active) .ca-mode-pill-count {
    background: var(--ca-bg-muted);
    color: var(--ca-ink-muted);
}

/* Header Right Actions */
.ca-header__actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.ca-search-trigger {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    height: 38px;
    padding: 0 12px;
    border-radius: 999px;
    border: 1px solid var(--ca-border);
    background: var(--ca-bg-elevated);
    color: var(--ca-ink-muted);
    font-size: 13px;
    transition: border-color 0.16s ease, box-shadow 0.16s ease;
}

.ca-search-trigger:hover {
    border-color: var(--ca-pine);
    color: var(--ca-ink);
}

.ca-search-trigger svg {
    width: 16px;
    height: 16px;
    color: var(--ca-pine);
}

.ca-kbd {
    font-size: 11px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 6px;
    background: var(--ca-bg-subtle);
    border: 1px solid var(--ca-border);
    color: var(--ca-ink-secondary);
}

.ca-progress-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 38px;
    padding: 0 13px;
    border-radius: 999px;
    border: 1px solid var(--ca-copper-border);
    background: var(--ca-copper-soft);
    color: var(--ca-copper);
    font-size: 13px;
    font-weight: 800;
}

.ca-progress-pill svg {
    width: 16px;
    height: 16px;
}

.ca-icon-btn {
    width: 38px;
    height: 38px;
    border-radius: 999px;
    border: 1px solid var(--ca-border);
    background: var(--ca-bg-elevated);
    color: var(--ca-ink-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.16s ease;
}

.ca-icon-btn:hover {
    border-color: var(--ca-pine);
    color: var(--ca-pine);
}

.ca-icon-btn svg {
    width: 18px;
    height: 18px;
}

[data-theme="light"] .icon-moon { display: block; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: block; }

.ca-sso-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    height: 38px;
    padding: 0 15px;
    border-radius: 999px;
    background: var(--ca-pine);
    color: #FFFFFF;
    font-size: 13px;
    font-weight: 700;
    transition: background 0.16s ease;
}

.ca-sso-btn:hover {
    background: var(--ca-pine-hover);
    color: #FFFFFF;
}

.ca-sso-btn svg {
    width: 16px;
    height: 16px;
}

.ca-user-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 4px 10px 4px 5px;
    border-radius: 999px;
    border: 1px solid var(--ca-border);
    background: var(--ca-bg-elevated);
}

.ca-user-chip__avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--ca-pine);
    color: #FFFFFF;
    font-size: 12px;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.ca-user-chip__meta {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.ca-user-chip__name {
    font-size: 12px;
    font-weight: 700;
    color: var(--ca-ink);
    max-width: 130px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ca-user-chip__role {
    font-size: 10.5px;
    font-weight: 600;
    color: var(--ca-pine);
}

.ca-user-chip__logout {
    color: var(--ca-ink-muted);
    display: inline-flex;
    padding: 4px;
}

.ca-user-chip__logout svg {
    width: 15px;
    height: 15px;
}

/* ==========================================================================
   2. MAIN STAGE & HERO BANNER
   ========================================================================== */
.ca-main {
    flex: 1;
    max-width: 1440px;
    width: 100%;
    margin: 0 auto;
    padding: 28px 24px 64px;
}

.ca-boot-skeleton {
    padding: 80px 20px;
    text-align: center;
    color: var(--ca-ink-muted);
}

.ca-boot-spinner {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 3px solid var(--ca-border);
    border-top-color: var(--ca-pine);
    margin: 0 auto 14px;
    animation: caSpin 0.8s linear infinite;
}

@keyframes caSpin {
    to { transform: rotate(360deg); }
}

/* Hero Overview Card */
.ca-hero {
    background: linear-gradient(135deg, #103F35 0%, #16594B 58%, #1E463D 100%);
    color: #FFFFFF;
    border-radius: var(--ca-radius-xl);
    padding: 34px 38px;
    margin-bottom: 28px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--ca-shadow-md);
}

.ca-hero::after {
    content: "";
    position: absolute;
    right: -80px;
    top: -80px;
    width: 340px;
    height: 340px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(234, 139, 66, 0.24) 0%, rgba(234, 139, 66, 0) 70%);
    pointer-events: none;
}

.ca-hero__grid {
    display: grid;
    grid-template-columns: 1.45fr 1fr;
    gap: 28px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.ca-hero__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 5px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.13);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.03em;
    margin-bottom: 14px;
}

.ca-hero__eyebrow svg {
    width: 15px;
    height: 15px;
    color: #FCD34D;
}

.ca-hero__title {
    font-family: 'Instrument Serif', Georgia, serif;
    font-size: clamp(30px, 3.3vw, 44px);
    font-weight: 400;
    line-height: 1.1;
    margin: 0 0 12px;
    letter-spacing: -0.01em;
}

.ca-hero__lead {
    margin: 0 0 20px;
    font-size: 15px;
    line-height: 1.65;
    color: rgba(255, 255, 255, 0.88);
    max-width: 680px;
}

.ca-persona-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.ca-persona-bar__label {
    font-size: 12px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.76);
    margin-right: 4px;
}

.ca-persona-chip {
    border: 1px solid rgba(255, 255, 255, 0.24);
    background: rgba(255, 255, 255, 0.09);
    color: #FFFFFF;
    padding: 6px 13px;
    border-radius: 999px;
    font-size: 12.5px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.16s ease;
}

.ca-persona-chip svg {
    width: 14px;
    height: 14px;
}

.ca-persona-chip:hover {
    background: rgba(255, 255, 255, 0.18);
}

.ca-persona-chip.is-active {
    background: #FFFFFF;
    color: #0E3E34;
    border-color: #FFFFFF;
    font-weight: 800;
}

.ca-hero__stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.ca-stat-glass {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--ca-radius-md);
    padding: 15px 16px;
    backdrop-filter: blur(8px);
}

.ca-stat-glass__val {
    font-size: 23px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 3px;
}

.ca-stat-glass__lbl {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.8);
}

/* ==========================================================================
   3. COURSE CATALOG CARDS & STEP-BY-STEP COURSE PLAYER
   ========================================================================== */
.ca-section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.ca-section-head h2 {
    margin: 0;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.ca-section-head p {
    margin: 4px 0 0;
    font-size: 14px;
    color: var(--ca-ink-secondary);
}

.ca-courses-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.ca-course-card {
    background: var(--ca-bg-elevated);
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 18px;
    box-shadow: var(--ca-shadow-xs);
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.ca-course-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--ca-shadow-md);
    border-color: var(--ca-pine-border);
}

.ca-course-card.is-recommended {
    border-color: var(--ca-copper-border);
    box-shadow: 0 0 0 1px var(--ca-copper-border), var(--ca-shadow-sm);
}

.ca-course-card__top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.ca-course-icon {
    width: 46px;
    height: 46px;
    border-radius: 13px;
    background: var(--ca-pine-soft);
    color: var(--ca-pine);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.ca-course-icon svg {
    width: 23px;
    height: 23px;
}

.ca-course-card__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: flex-end;
}

.ca-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 11.5px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 999px;
    line-height: 1.2;
}

.ca-badge svg {
    width: 13px;
    height: 13px;
}

.ca-badge--pine {
    background: var(--ca-pine-soft);
    color: var(--ca-pine-ink);
    border: 1px solid var(--ca-pine-border);
}

.ca-badge--copper {
    background: var(--ca-copper-soft);
    color: var(--ca-copper);
    border: 1px solid var(--ca-copper-border);
}

.ca-badge--muted {
    background: var(--ca-bg-subtle);
    color: var(--ca-ink-secondary);
    border: 1px solid var(--ca-border);
}

.ca-badge--danger {
    background: var(--ca-danger-soft);
    color: var(--ca-danger);
}

.ca-badge--success {
    background: var(--ca-success-soft);
    color: var(--ca-success);
}

.ca-course-card__title {
    margin: 12px 0 8px;
    font-size: 19px;
    font-weight: 800;
    letter-spacing: -0.015em;
    line-height: 1.3;
}

.ca-course-card__desc {
    margin: 0 0 14px;
    font-size: 14px;
    color: var(--ca-ink-secondary);
}

.ca-course-parts-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.ca-part-pill {
    font-size: 11.5px;
    font-weight: 600;
    padding: 4px 9px;
    border-radius: 8px;
    background: var(--ca-bg-subtle);
    color: var(--ca-ink-secondary);
    border: 1px solid var(--ca-border);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.ca-part-pill.is-done {
    background: var(--ca-pine-soft);
    color: var(--ca-pine-ink);
    border-color: var(--ca-pine-border);
}

.ca-part-pill svg {
    width: 12px;
    height: 12px;
}

.ca-course-card__foot {
    padding-top: 14px;
    border-top: 1px solid var(--ca-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.ca-progress-bar-wrap {
    flex: 1;
}

.ca-progress-bar-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    font-weight: 700;
    color: var(--ca-ink-secondary);
    margin-bottom: 5px;
}

.ca-progress-track {
    height: 7px;
    border-radius: 999px;
    background: var(--ca-bg-muted);
    overflow: hidden;
}

.ca-progress-fill {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--ca-pine) 0%, var(--ca-copper) 100%);
    transition: width 0.3s ease;
}

.ca-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 11px;
    font-size: 13.5px;
    font-weight: 700;
    border: 1px solid transparent;
    transition: all 0.16s ease;
    white-space: nowrap;
}

.ca-btn svg {
    width: 16px;
    height: 16px;
}

.ca-btn--primary {
    background: var(--ca-pine);
    color: #FFFFFF;
}

.ca-btn--primary:hover {
    background: var(--ca-pine-hover);
    color: #FFFFFF;
}

.ca-btn--copper {
    background: var(--ca-copper);
    color: #FFFFFF;
}

.ca-btn--copper:hover {
    background: var(--ca-copper-hover);
    color: #FFFFFF;
}

.ca-btn--ghost {
    background: var(--ca-bg-elevated);
    border-color: var(--ca-border);
    color: var(--ca-ink);
}

.ca-btn--ghost:hover {
    border-color: var(--ca-pine);
    color: var(--ca-pine);
}

/* ==========================================================================
   4. STEP-BY-STEP COURSE READER ("PARTIE PAR PARTIE")
   ========================================================================== */
.ca-reader-layout {
    display: grid;
    grid-template-columns: 310px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
}

.ca-reader-sidebar {
    position: sticky;
    top: calc(var(--ca-header-h) + 20px);
    background: var(--ca-bg-elevated);
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-lg);
    padding: 18px;
    box-shadow: var(--ca-shadow-xs);
    max-height: calc(100vh - var(--ca-header-h) - 40px);
    overflow-y: auto;
}

.ca-back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12.5px;
    font-weight: 700;
    color: var(--ca-ink-secondary);
    background: none;
    border: none;
    padding: 0;
    margin-bottom: 12px;
}

.ca-back-link:hover {
    color: var(--ca-pine);
}

.ca-back-link svg {
    width: 15px;
    height: 15px;
}

.ca-reader-sidebar__title {
    font-size: 15px;
    font-weight: 800;
    margin: 0 0 12px;
    line-height: 1.3;
}

.ca-step-list {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-top: 14px;
}

.ca-step-btn {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    width: 100%;
    text-align: left;
    padding: 10px 11px;
    border-radius: 10px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--ca-ink-secondary);
    font-size: 13px;
    font-weight: 600;
    line-height: 1.35;
    transition: all 0.15s ease;
}

.ca-step-btn:hover {
    background: var(--ca-bg-subtle);
    color: var(--ca-ink);
}

.ca-step-btn.is-active {
    background: var(--ca-pine-soft);
    border-color: var(--ca-pine-border);
    color: var(--ca-pine-ink);
    font-weight: 700;
}

.ca-step-num {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--ca-bg-muted);
    color: var(--ca-ink-secondary);
    font-size: 11px;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}

.ca-step-btn.is-active .ca-step-num {
    background: var(--ca-pine);
    color: #FFFFFF;
}

.ca-step-btn.is-done .ca-step-num {
    background: var(--ca-success);
    color: #FFFFFF;
}

.ca-step-num svg {
    width: 13px;
    height: 13px;
}

/* Lesson Content Stage */
.ca-lesson-stage {
    background: var(--ca-bg-elevated);
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-xl);
    padding: 34px 38px;
    box-shadow: var(--ca-shadow-sm);
}

.ca-lesson-head {
    padding-bottom: 22px;
    margin-bottom: 26px;
    border-bottom: 1px solid var(--ca-border);
}

.ca-lesson-kicker {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.ca-lesson-title {
    margin: 0 0 10px;
    font-size: clamp(23px, 2.4vw, 31px);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.22;
}

.ca-lesson-summary {
    margin: 0;
    font-size: 15.5px;
    color: var(--ca-ink-secondary);
    line-height: 1.65;
}

/* Rich Pedagogical Blocks */
.ca-block {
    margin-bottom: 28px;
}

.ca-block h3 {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 18px;
    font-weight: 800;
    margin: 0 0 12px;
    color: var(--ca-ink);
}

.ca-block h3 svg {
    width: 20px;
    height: 20px;
    color: var(--ca-pine);
    flex-shrink: 0;
}

.ca-block p {
    margin: 0 0 12px;
    font-size: 14.8px;
    color: var(--ca-ink-secondary);
    line-height: 1.7;
}

/* Technical Vocabulary Grid */
.ca-terms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
}

.ca-term-card {
    background: var(--ca-bg-subtle);
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-md);
    padding: 14px 16px;
}

.ca-term-card__code {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    font-weight: 700;
    color: var(--ca-pine-ink);
    background: var(--ca-pine-soft);
    padding: 2px 8px;
    border-radius: 6px;
    margin-bottom: 6px;
}

.ca-term-card__title {
    font-size: 14px;
    font-weight: 800;
    color: var(--ca-ink);
    margin-bottom: 4px;
}

.ca-term-card__def {
    font-size: 13px;
    color: var(--ca-ink-secondary);
    line-height: 1.55;
}

/* Callout / Alert Box */
.ca-callout {
    border-radius: var(--ca-radius-md);
    padding: 16px 18px;
    border: 1px solid var(--ca-pine-border);
    background: var(--ca-pine-soft);
    display: flex;
    gap: 13px;
    align-items: flex-start;
    margin: 18px 0;
}

.ca-callout svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--ca-pine);
}

.ca-callout--copper {
    background: var(--ca-copper-soft);
    border-color: var(--ca-copper-border);
}

.ca-callout--copper svg {
    color: var(--ca-copper);
}

.ca-callout--danger {
    background: var(--ca-danger-soft);
    border-color: rgba(185, 28, 28, 0.3);
}

.ca-callout--danger svg {
    color: var(--ca-danger);
}

.ca-callout__body strong {
    display: block;
    font-size: 14px;
    font-weight: 800;
    color: var(--ca-ink);
    margin-bottom: 3px;
}

.ca-callout__body p {
    margin: 0;
    font-size: 13.5px;
    color: var(--ca-ink-secondary);
    line-height: 1.6;
}

/* Real Annotated Screenshot Frame */
.ca-shot-showcase {
    background: var(--ca-bg-subtle);
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-lg);
    overflow: hidden;
    margin: 20px 0;
}

.ca-shot-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 16px;
    background: var(--ca-bg-elevated);
    border-bottom: 1px solid var(--ca-border);
    flex-wrap: wrap;
}

.ca-shot-bar__left {
    display: flex;
    align-items: center;
    gap: 9px;
    min-width: 0;
}

.ca-shot-dots {
    display: inline-flex;
    gap: 5px;
}

.ca-shot-dots span {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--ca-border-strong);
}

.ca-shot-url {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11.5px;
    color: var(--ca-ink-secondary);
    background: var(--ca-bg-subtle);
    padding: 3px 9px;
    border-radius: 6px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 460px;
}

.ca-shot-zoom-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 700;
    padding: 5px 11px;
    border-radius: 8px;
    border: 1px solid var(--ca-border);
    background: var(--ca-bg-subtle);
    color: var(--ca-pine);
}

.ca-shot-zoom-btn svg {
    width: 14px;
    height: 14px;
}

.ca-shot-canvas {
    position: relative;
    padding: 16px;
    display: flex;
    justify-content: center;
    background: radial-gradient(circle at top, var(--ca-bg-muted), var(--ca-bg-subtle));
    cursor: zoom-in;
}

.ca-shot-canvas img {
    border-radius: 10px;
    border: 1px solid var(--ca-border);
    box-shadow: var(--ca-shadow-md);
    max-height: 520px;
    width: auto;
    object-fit: contain;
    background: #FFFFFF;
}

.ca-shot-canvas--crop img {
    max-height: 360px;
}

.ca-shot-points {
    padding: 16px 18px;
    background: var(--ca-bg-elevated);
    border-top: 1px solid var(--ca-border);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 12px;
}

.ca-shot-point {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: var(--ca-ink-secondary);
    line-height: 1.5;
}

.ca-shot-pin {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--ca-copper);
    color: #FFFFFF;
    font-size: 11.5px;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}

.ca-shot-point strong {
    color: var(--ca-ink);
    display: block;
    margin-bottom: 2px;
}

/* Step-by-step Scenarios / Use Cases */
.ca-scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 14px;
}

.ca-scenario-card {
    background: var(--ca-bg-subtle);
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-md);
    padding: 16px 18px;
}

.ca-scenario-card__tag {
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ca-copper);
    margin-bottom: 5px;
}

.ca-scenario-card__title {
    font-size: 14.5px;
    font-weight: 800;
    color: var(--ca-ink);
    margin-bottom: 8px;
}

.ca-scenario-steps {
    margin: 0;
    padding-left: 18px;
    font-size: 13.2px;
    color: var(--ca-ink-secondary);
    line-height: 1.6;
}

.ca-scenario-steps li {
    margin-bottom: 4px;
}

/* Responsive Data Tables */
.ca-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-md);
    margin: 16px 0;
    background: var(--ca-bg-elevated);
}

.ca-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.2px;
    text-align: left;
}

.ca-table th {
    background: var(--ca-bg-subtle);
    color: var(--ca-ink);
    font-weight: 800;
    padding: 11px 14px;
    border-bottom: 1px solid var(--ca-border);
    white-space: nowrap;
}

.ca-table td {
    padding: 11px 14px;
    border-bottom: 1px solid var(--ca-border);
    color: var(--ca-ink-secondary);
    vertical-align: top;
    line-height: 1.55;
}

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

.ca-table td strong {
    color: var(--ca-ink);
}

/* Lesson Footer Navigation & Comprehension Check */
.ca-lesson-foot {
    margin-top: 32px;
    padding-top: 22px;
    border-top: 1px solid var(--ca-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
}

/* Interactive Quiz Card */
.ca-quiz-box {
    background: var(--ca-bg-subtle);
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-lg);
    padding: 24px;
    margin-top: 18px;
}

.ca-quiz-q {
    background: var(--ca-bg-elevated);
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-md);
    padding: 18px;
    margin-bottom: 14px;
}

.ca-quiz-q__title {
    font-size: 15px;
    font-weight: 800;
    margin: 0 0 12px;
    color: var(--ca-ink);
}

.ca-quiz-opts {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ca-quiz-opt {
    display: flex;
    align-items: center;
    gap: 10px;
    text-align: left;
    padding: 11px 14px;
    border-radius: 10px;
    border: 1px solid var(--ca-border);
    background: var(--ca-bg-subtle);
    color: var(--ca-ink);
    font-size: 13.5px;
    font-weight: 600;
    transition: all 0.14s ease;
}

.ca-quiz-opt:hover {
    border-color: var(--ca-pine);
}

.ca-quiz-opt.is-selected {
    border-color: var(--ca-pine);
    background: var(--ca-pine-soft);
    color: var(--ca-pine-ink);
}

.ca-quiz-opt.is-correct {
    border-color: var(--ca-success);
    background: var(--ca-success-soft);
    color: var(--ca-success);
}

.ca-quiz-opt.is-wrong {
    border-color: var(--ca-danger);
    background: var(--ca-danger-soft);
    color: var(--ca-danger);
}

.ca-quiz-explain {
    margin-top: 10px;
    padding: 10px 13px;
    border-radius: 9px;
    background: var(--ca-pine-soft);
    color: var(--ca-ink-secondary);
    font-size: 13px;
}

/* ==========================================================================
   5. MODE RESSOURCES (ENCYCLOPÉDIE INTÉGRALE)
   ========================================================================== */
.ca-res-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 6px;
    margin-bottom: 24px;
    scrollbar-width: thin;
}

.ca-res-tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: 12px;
    border: 1px solid var(--ca-border);
    background: var(--ca-bg-elevated);
    color: var(--ca-ink-secondary);
    font-size: 13.2px;
    font-weight: 700;
    white-space: nowrap;
    transition: all 0.16s ease;
}

.ca-res-tab svg {
    width: 17px;
    height: 17px;
    flex-shrink: 0;
}

.ca-res-tab:hover {
    border-color: var(--ca-pine);
    color: var(--ca-ink);
}

.ca-res-tab.is-active {
    background: var(--ca-pine);
    border-color: var(--ca-pine);
    color: #FFFFFF;
    box-shadow: var(--ca-shadow-xs);
}

.ca-res-filter-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.ca-res-search {
    flex: 1;
    min-width: 240px;
    display: flex;
    align-items: center;
    gap: 9px;
    background: var(--ca-bg-elevated);
    border: 1px solid var(--ca-border);
    border-radius: 12px;
    padding: 0 14px;
    height: 44px;
}

.ca-res-search svg {
    width: 18px;
    height: 18px;
    color: var(--ca-pine);
    flex-shrink: 0;
}

.ca-res-search input {
    border: none;
    background: transparent;
    color: var(--ca-ink);
    font-family: inherit;
    font-size: 14px;
    width: 100%;
    outline: none;
}

.ca-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 18px;
}

.ca-ref-card {
    background: var(--ca-bg-elevated);
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-lg);
    padding: 20px;
    box-shadow: var(--ca-shadow-xs);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ca-ref-card__shot {
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--ca-border);
    aspect-ratio: 16 / 10;
    background: var(--ca-bg-subtle);
    cursor: zoom-in;
    position: relative;
}

.ca-ref-card__shot img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    transition: transform 0.25s ease;
}

.ca-ref-card__shot:hover img {
    transform: scale(1.025);
}

.ca-ref-card__title {
    margin: 0;
    font-size: 17px;
    font-weight: 800;
    color: var(--ca-ink);
}

.ca-ref-card__list {
    margin: 0;
    padding-left: 18px;
    font-size: 13.2px;
    color: var(--ca-ink-secondary);
    line-height: 1.6;
}

.ca-ref-card__list li {
    margin-bottom: 5px;
}

/* Architecture Visual Map */
.ca-arch-map {
    background: var(--ca-bg-elevated);
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-xl);
    padding: 26px;
    margin-bottom: 24px;
    box-shadow: var(--ca-shadow-xs);
}

.ca-arch-layers {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.ca-arch-layer {
    border: 1px solid var(--ca-border);
    background: var(--ca-bg-subtle);
    border-radius: var(--ca-radius-md);
    padding: 16px 18px;
}

.ca-arch-layer__label {
    font-size: 11.5px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--ca-pine);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 7px;
}

.ca-arch-layer__label svg {
    width: 15px;
    height: 15px;
}

.ca-arch-nodes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 10px;
}

.ca-arch-node {
    background: var(--ca-bg-elevated);
    border: 1px solid var(--ca-border);
    border-radius: 10px;
    padding: 11px 13px;
}

.ca-arch-node strong {
    display: block;
    font-size: 13.5px;
    color: var(--ca-ink);
}

.ca-arch-node span {
    display: block;
    font-size: 12px;
    color: var(--ca-ink-secondary);
    margin-top: 2px;
}

/* Glossary A-Z */
.ca-glossary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 14px;
}

/* ==========================================================================
   6. MODALS (SEARCH CTRL+K, LIGHTBOX @2X, PROGRESS PASSPORT) & FOOTER
   ========================================================================== */
.ca-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 9500;
    background: rgba(9, 18, 15, 0.68);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 5vh 16px;
    overflow-y: auto;
}

.ca-modal-backdrop[hidden] {
    display: none !important;
}

.ca-search-dialog,
.ca-progress-dialog {
    width: 100%;
    max-width: 720px;
    background: var(--ca-bg-elevated);
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-lg);
    box-shadow: var(--ca-shadow-lg);
    overflow: hidden;
}

.ca-search-dialog__head {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--ca-border);
}

.ca-search-dialog__head svg {
    width: 20px;
    height: 20px;
    color: var(--ca-pine);
    flex-shrink: 0;
}

.ca-search-dialog__head input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--ca-ink);
    font-family: inherit;
    font-size: 15.5px;
    outline: none;
}

.ca-modal-close {
    border: 1px solid var(--ca-border);
    background: var(--ca-bg-subtle);
    color: var(--ca-ink-secondary);
    border-radius: 8px;
    padding: 5px 10px;
    font-size: 12px;
    font-weight: 700;
}

.ca-search-dialog__results {
    max-height: 62vh;
    overflow-y: auto;
    padding: 10px;
}

.ca-search-hit {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
    text-align: left;
    padding: 12px 14px;
    border-radius: 10px;
    border: none;
    background: transparent;
    color: var(--ca-ink);
    transition: background 0.14s ease;
}

.ca-search-hit:hover {
    background: var(--ca-pine-soft);
}

.ca-search-hit__title {
    font-size: 14px;
    font-weight: 800;
    margin-bottom: 2px;
}

.ca-search-hit__sub {
    font-size: 12.5px;
    color: var(--ca-ink-secondary);
}

/* Lightbox */
.ca-lightbox {
    width: 100%;
    max-width: 1220px;
    background: var(--ca-bg-elevated);
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-radius-lg);
    box-shadow: var(--ca-shadow-lg);
    overflow: hidden;
}

.ca-lightbox__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--ca-border);
}

.ca-lightbox__meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.ca-lightbox__body {
    background: #0B1210;
    padding: 16px;
    display: flex;
    justify-content: center;
    max-height: 74vh;
    overflow: auto;
}

.ca-lightbox__body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.ca-lightbox__caption {
    padding: 13px 20px;
    font-size: 13.5px;
    color: var(--ca-ink-secondary);
    border-top: 1px solid var(--ca-border);
}

.ca-progress-dialog__body {
    padding: 20px;
    max-height: 72vh;
    overflow-y: auto;
}

/* Footer */
.ca-footer {
    border-top: 1px solid var(--ca-border);
    background: var(--ca-bg-elevated);
    padding: 24px;
    margin-top: auto;
}

.ca-footer__inner {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
    font-size: 13px;
    color: var(--ca-ink-secondary);
}

.ca-footer__brand span {
    display: block;
    font-size: 12px;
    color: var(--ca-ink-muted);
    margin-top: 3px;
}

.ca-footer__links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-weight: 600;
}

.ca-mobile-bar {
    display: none;
}

/* ==========================================================================
   7. RESPONSIVE TABLET & MOBILE (< 1080px / < 768px)
   ========================================================================== */
@media (max-width: 1120px) {
    .ca-search-trigger__label,
    .ca-kbd,
    .ca-mode-pill-count {
        display: none;
    }

    .ca-hero__grid {
        grid-template-columns: 1fr;
    }

    .ca-reader-layout {
        grid-template-columns: 1fr;
    }

    .ca-reader-sidebar {
        position: static;
        max-height: none;
    }
}

@media (max-width: 820px) {
    .ca-header__inner {
        padding: 0 14px;
        gap: 8px;
    }

    .ca-mode-switch,
    .ca-search-trigger,
    .ca-progress-pill {
        display: none;
    }

    .ca-user-chip__meta {
        display: none;
    }

    .ca-main {
        padding: 16px 14px 92px;
    }

    .ca-hero {
        padding: 22px 18px;
        border-radius: var(--ca-radius-lg);
    }

    .ca-courses-grid,
    .ca-cards-grid {
        grid-template-columns: 1fr;
    }

    .ca-lesson-stage {
        padding: 20px 16px;
        border-radius: var(--ca-radius-lg);
    }

    .ca-footer {
        padding-bottom: 88px;
    }

    .ca-mobile-bar {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 920;
        height: 64px;
        background: var(--ca-surface-glass);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-top: 1px solid var(--ca-border);
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        padding-bottom: env(safe-area-inset-bottom, 0);
    }

    .ca-mobile-bar__btn {
        border: none;
        background: transparent;
        color: var(--ca-ink-muted);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 3px;
        font-size: 11px;
        font-weight: 700;
    }

    .ca-mobile-bar__btn svg {
        width: 20px;
        height: 20px;
    }

    .ca-mobile-bar__btn.is-active {
        color: var(--ca-pine);
    }
}

.ca-alpha-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 18px;
}

.ca-alpha-btn {
    min-width: 32px;
    height: 32px;
    padding: 0 9px;
    border-radius: 8px;
    border: 1px solid var(--ca-border);
    background: var(--ca-bg-elevated);
    color: var(--ca-ink-secondary);
    font-size: 12px;
    font-weight: 800;
    transition: all 0.14s ease;
}

.ca-alpha-btn:hover {
    border-color: var(--ca-pine);
    color: var(--ca-pine);
}

.ca-alpha-btn.is-active {
    background: var(--ca-pine);
    border-color: var(--ca-pine);
    color: #FFFFFF;
}

.ca-cert-banner {
    background: linear-gradient(135deg, #103F35 0%, #175C4D 100%);
    color: #FFFFFF;
    border-radius: var(--ca-radius-lg);
    padding: 22px 24px;
    margin-top: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.ca-cert-banner h4 {
    margin: 0 0 4px;
    font-size: 17px;
    font-weight: 800;
}

.ca-cert-banner p {
    margin: 0;
    font-size: 13.5px;
    color: rgba(255, 255, 255, 0.88);
}

@media (max-width: 640px) {
    .ca-hero__stats,
    .ca-terms-grid,
    .ca-scenarios-grid,
    .ca-shot-points,
    .ca-arch-nodes,
    .ca-glossary-grid {
        grid-template-columns: 1fr;
    }

    .ca-shot-url {
        max-width: 185px;
    }

    .ca-res-search {
        min-width: 100%;
    }

    .ca-lesson-foot .ca-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .ca-header__inner {
        padding: 0 12px;
        gap: 6px;
    }

    .ca-brand {
        gap: 8px;
        min-width: 0;
    }

    .ca-brand__mark {
        width: 33px;
        height: 33px;
        border-radius: 9px;
    }

    .ca-brand__mark svg {
        width: 18px;
        height: 18px;
    }

    .ca-brand__eyebrow {
        font-size: 9px;
        letter-spacing: 0.04em;
    }

    .ca-brand__title {
        font-size: 14.5px;
    }

    .ca-header__actions {
        gap: 6px;
    }

    .ca-icon-btn {
        width: 34px;
        height: 34px;
    }

    .ca-sso-btn {
        height: 34px;
        padding: 0 11px;
        font-size: 12px;
        gap: 5px;
    }
}