/* =========================================================
   MODULR LAB — common.css
   Custom properties, reset, base styles, composants, grilles
   ========================================================= */

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

/* --- Custom properties --- */
:root {
    --color-bg: #FFFFFF;
    --color-text: #0A0A0A;
    --color-text-secondary: rgba(10, 10, 10, 0.55);
    --color-text-tertiary: rgba(10, 10, 10, 0.5);
    --color-border: rgba(10, 10, 10, 0.15);
    --color-accent: #00B8D9;
    --color-accent-dark: #003B45;

    --font-display: 'Inter', sans-serif;
    --font-body: 'Manrope', sans-serif;

    --page-max-width: 1440px;
    --page-margin: 64px;
    --rail-width: 200px;
    --gutter: 24px;
    --section-gap: 144px;
}

/* --- Base --- */
html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.5;
}

a {
    color: inherit;
    text-decoration: none;
}

/* =========================================================
   LAYOUT — Grilles gérées en CSS (pas en Tailwind)
   ========================================================= */

/* --- Conteneur de page --- */
.page-container {
    max-width: var(--page-max-width);
    margin: 0 auto;
    padding-left: var(--page-margin);
    padding-right: var(--page-margin);
}

/* --- Grille rail + contenu (2 colonnes desktop) --- */
.row-grid {
    display: grid;
    grid-template-columns: var(--rail-width) 1fr;
    gap: var(--gutter);
    align-items: start;
}

/* --- Espacement entre sections --- */
.section-gap {
    margin-top: var(--section-gap);
}

/* --- Rail label --- */
.rail-label {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 500;
    padding-top: 12px;
    letter-spacing: 0.01em;
    color: var(--color-text);
}

.rail-label--accent {
    color: var(--color-accent);
}

/* --- Grille leçons (3 colonnes asymétriques) --- */
.lessons-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1.2fr;
    gap: 32px;
    align-items: start;
}

/* --- Décalages verticaux des cards --- */
.lesson-offset-80 {
    padding-top: 80px;
}

.lesson-offset-32 {
    padding-top: 32px;
}

/* --- Hero --- */
.hero-title {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 110px;
    line-height: 0.88;
    letter-spacing: -0.045em;
    color: var(--color-text);
    margin-bottom: 32px;
}

.hero-lead {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 24px;
    line-height: 1.2;
    color: var(--color-text);
    max-width: 32ch;
    margin-bottom: 12px;
}

.hero-meta {
    font-family: var(--font-body);
    font-size: 12px;
    line-height: 1.4;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
}

/* --- Manifeste --- */
.manifesto-text {
    font-family: var(--font-body);
    font-size: 18px;
    line-height: 1.65;
    color: var(--color-text);
    max-width: 60ch;
    margin-bottom: 20px;
}

/* --- Footer --- */
.footer {
    margin-top: var(--section-gap);
    border-top: 0.5px solid var(--color-border);
    padding-top: 48px;
    padding-bottom: 64px;
}

.footer-layout {
    display: grid;
    grid-template-columns: var(--rail-width) 1fr;
    gap: var(--gutter);
}

.footer-brand {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    padding-top: 48px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 32px;
    padding-top: 48px;
}

.footer-col-title {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

/* =========================================================
   COMPOSANTS
   ========================================================= */

/* --- Header --- */
.site-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-top: 48px;
    padding-bottom: 144px;
}

.logo-link {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 28px;
    line-height: 1;
    letter-spacing: -0.02em;
    color: var(--color-text);
    text-decoration: none;
    transition: text-decoration-color 0.3s ease;
}

.logo-link:hover {
    text-decoration: line-through;
    text-decoration-color: var(--color-text);
    text-decoration-thickness: 2px;
}

.desktop-nav {
    display: flex;
    gap: 32px;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 500;
}

/* --- Liens --- */
.nav-link {
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--color-accent);
}

.cta {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-accent);
    border-bottom: 1px solid var(--color-accent);
    padding-bottom: 4px;
    letter-spacing: 0.01em;
    transition: opacity 0.3s ease;
}

.cta:hover {
    opacity: 0.65;
}

.read-more {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-text);
    padding-bottom: 4px;
    transition: color 0.3s ease, border-color 0.3s ease;
}

.read-more:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

/* --- Lesson cards --- */
.lesson-title-lg {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 32px;
    line-height: 1.05;
    letter-spacing: -0.01em;
    color: var(--color-text);
    margin-bottom: 12px;
}

.lesson-title-sm {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 24px;
    line-height: 1.05;
    letter-spacing: -0.01em;
    color: var(--color-text);
    margin-bottom: 12px;
}

.lesson-desc {
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.4;
    color: var(--color-text);
    margin-bottom: 8px;
}

.lesson-meta {
    font-family: var(--font-body);
    font-size: 12px;
    line-height: 1.4;
    letter-spacing: 0.02em;
    color: var(--color-text-tertiary);
}

/* --- Menu burger (caché par défaut en desktop) --- */
.burger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
}

.burger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* --- Overlay menu mobile (caché par défaut) --- */
.menu-overlay {
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    z-index: 100;
    display: flex;
    flex-direction: column;
    padding: 32px 24px;
    transform: translateX(100%);
    transition: transform 0.4s ease;
}

.menu-overlay.is-open {
    transform: translateX(0);
}

.menu-overlay-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 80px;
}

.menu-close {
    background: none;
    border: none;
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.menu-overlay nav {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.menu-overlay nav a {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-text);
    transition: color 0.3s ease;
}

.menu-overlay nav a:hover {
    color: var(--color-accent);
}

/* --- Lesson cards (page le cours — sommaire) --- */
.lessons-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.lesson-card {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: var(--gutter);
    padding: 40px 0;
    border-bottom: 0.5px solid var(--color-border);
    text-decoration: none;
    color: var(--color-text);
    transition: background 0.3s ease;
}

.lesson-card:first-child {
    border-top: 0.5px solid var(--color-border);
}

.lesson-card:hover {
    background: rgba(0, 184, 217, 0.04);
}

.lesson-card:hover .lesson-title-sm {
    color: var(--color-accent);
}

.lesson-card-number {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 48px;
    line-height: 1;
    color: var(--color-text-tertiary);
    padding-top: 4px;
}

.lesson-card:hover .lesson-card-number {
    color: var(--color-accent);
}

.lesson-card-content {
    max-width: 60ch;
}

.lesson-card-content .lesson-title-sm {
    transition: color 0.3s ease;
}

.lesson-card-content .lesson-desc {
    margin-bottom: 12px;
}

/* --- Formulaires --- */
.form-container {
    max-width: 560px;
}

.contact-form,
.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
}

.form-input {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-text);
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--color-border);
    padding: 12px 0;
    outline: none;
    transition: border-color 0.3s ease;
    width: 100%;
}

.form-input::placeholder {
    color: var(--color-text-tertiary);
}

.form-input:focus {
    border-color: var(--color-accent);
}

.form-input.is-invalid {
    border-color: #E53E3E;
}

.form-select {
    appearance: none;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%230A0A0A' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0 center;
    padding-right: 24px;
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-error {
    font-family: var(--font-body);
    font-size: 13px;
    color: #E53E3E;
    display: none;
}

.form-error.is-visible {
    display: block;
}

.form-submit {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-bg);
    background: var(--color-text);
    border: none;
    padding: 16px 32px;
    cursor: pointer;
    transition: background 0.3s ease;
    align-self: flex-start;
}

.form-submit:hover {
    background: var(--color-accent);
}

.form-submit--compact {
    padding: 12px 24px;
    white-space: nowrap;
}

.newsletter-row {
    display: flex;
    gap: 16px;
    align-items: flex-end;
}

.newsletter-row .form-input {
    flex: 1;
}

.form-success {
    display: none;
    padding: 32px 0;
}

.form-success.is-visible {
    display: block;
}

/* --- Vidéo responsive 16:9 --- */
.video-container {
    max-width: 100%;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    /* ratio 16:9 */
    height: 0;
    overflow: hidden;
    background: #000;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* --- Contenu pédagogique --- */
.lesson-content {
    max-width: 65ch;
}

/* --- Navigation leçon précédente / suivante --- */
.lesson-nav {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    gap: 32px;
    padding: 40px 0;
    border-top: 0.5px solid var(--color-border);
    border-bottom: 0.5px solid var(--color-border);
}

.lesson-nav-prev,
.lesson-nav-next {
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-decoration: none;
    color: var(--color-text);
    transition: color 0.3s ease;
}

.lesson-nav-next {
    text-align: right;
    margin-left: auto;
}

.lesson-nav-prev:hover,
.lesson-nav-next:hover {
    color: var(--color-accent);
}

.lesson-nav-label {
    font-family: var(--font-body);
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
}

.lesson-nav-title {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    line-height: 1.1;
}

.lesson-nav-prev:hover .lesson-nav-label,
.lesson-nav-next:hover .lesson-nav-label {
    color: var(--color-accent);
}

/* --- Contenu légal --- */
.legal-content {
    max-width: 60ch;
}

/* =========================================================
   ANIMATIONS
   ========================================================= */

/* --- Apparitions au scroll --- */
.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* Délais en cascade pour les éléments groupés */
.reveal-delay-1 {
    transition-delay: 0.1s;
}

.reveal-delay-2 {
    transition-delay: 0.2s;
}

.reveal-delay-3 {
    transition-delay: 0.3s;
}

/* --- Curseur personnalisé --- */
.custom-cursor {
    position: fixed;
    top: 0;
    left: 0;
    width: 12px;
    height: 12px;
    background: var(--color-accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.2s ease, height 0.2s ease, background 0.2s ease, opacity 0.2s ease;
    opacity: 0;
    mix-blend-mode: difference;
}

.custom-cursor.is-active {
    opacity: 1;
}

.custom-cursor.is-hovering {
    width: 40px;
    height: 40px;
    background: var(--color-accent);
}

/* --- Hover sophistiqué sur les lesson-cards du sommaire --- */
.lesson-card .lesson-card-number {
    transition: color 0.3s ease, transform 0.3s ease;
}

.lesson-card:hover .lesson-card-number {
    transform: translateX(8px);
}

.lesson-card .lesson-card-content .lesson-title-sm {
    transition: color 0.3s ease, letter-spacing 0.3s ease;
}

.lesson-card:hover .lesson-card-content .lesson-title-sm {
    letter-spacing: 0.02em;
}

/* --- Hover sur les articles de la page d'accueil --- */
.lessons-grid article {
    transition: transform 0.3s ease;
}

.lessons-grid article:hover {
    transform: translateY(-4px);
}

/* --- Transition douce sur les liens de navigation leçon --- */
.lesson-nav-prev,
.lesson-nav-next {
    transition: color 0.3s ease, transform 0.3s ease;
}

.lesson-nav-next:hover {
    transform: translateX(8px);
}

.lesson-nav-prev:hover {
    transform: translateX(-8px);
}

/* --- Lien read-more : flèche qui glisse --- */
.read-more::after {
    content: '';
    display: inline-block;
    transition: transform 0.3s ease;
}

.read-more:hover::after {
    transform: translateX(4px);
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
/* --- Tablette --- */
@media (max-width: 1024px) {
    :root {
        --page-margin: 40px;
        --rail-width: 140px;
        --section-gap: 96px;
    }

    .hero-title {
        font-size: 80px;
    }

    .lessons-grid {
        grid-template-columns: 1fr 1fr;
    }

    .lesson-offset-80 {
        padding-top: 40px;
    }

    .lesson-offset-32 {
        padding-top: 16px;
    }
}

/* --- Mobile --- */
@media (max-width: 768px) {
    :root {
        --page-margin: 24px;
        --section-gap: 96px;
    }

    .site-header {
        padding-top: 32px;
        padding-bottom: 80px;
    }

    .desktop-nav {
        display: none;
    }

    .burger {
        display: flex;
    }

    .row-grid {
        grid-template-columns: 1fr;
    }

    .rail-label {
        padding-top: 0;
        margin-bottom: 24px;
    }

    .lessons-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .lesson-offset-80,
    .lesson-offset-32 {
        padding-top: 0;
    }

    .hero-title {
        font-size: 56px;
        line-height: 0.9;
    }

    .hero-lead {
        font-size: 20px;
    }

    .manifesto-text {
        max-width: 100%;
    }

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

    .footer-brand {
        padding-top: 0;
        margin-bottom: 32px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .logo-link {
        font-size: 22px;
    }

    /* Lesson cards sommaire */
    .lesson-card {
        grid-template-columns: 48px 1fr;
        padding: 32px 0;
    }

    .lesson-card-number {
        font-size: 32px;
    }

    /* Formulaires */
    .newsletter-row {
        flex-direction: column;
        align-items: stretch;
    }

    .form-submit {
        align-self: stretch;
        text-align: center;
    }

    /* Navigation leçons */
    .lesson-nav {
        flex-direction: column;
        gap: 24px;
    }

    .lesson-nav-next {
        text-align: left;
    }

    .lesson-nav-title {
        font-size: 20px;
    }

    /* Curseur custom désactivé sur mobile (écran tactile) */
    .custom-cursor {
        display: none;
    }
}

/* =========================================================
   PREFERS-REDUCED-MOTION
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .custom-cursor {
        display: none;
    }

    .lesson-card .lesson-card-number,
    .lesson-card .lesson-card-content .lesson-title-sm,
    .lessons-grid article,
    .lesson-nav-prev,
    .lesson-nav-next,
    .read-more::after,
    .nav-link,
    .cta,
    .read-more,
    .logo-link,
    .menu-overlay {
        transition: none;
    }
}