* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bleu-fonce: #0A2540;
    --bleu-electrique: #0066FF;
    --royal: #2563EB;
    --bleu-vif: #0091FF;
    --cyan: #00C2FF;
    --orange: #FF7A45;
    --blanc: #FFFFFF;

    --fond: #F4F8FD;
    --fond-2: #E9F1FA;
    --carte: #FFFFFF;
    --bord: rgba(10, 37, 64, 0.10);
    --texte: #0A2540;
    --texte-doux: #5A6B7D;

    --t-fond: #061626;
    --t-side: #0B2138;
    --t-carte: #122C47;
    --t-bord: rgba(255, 255, 255, 0.09);
    --t-texte: #EAF2FA;
    --t-doux: #8FA6BC;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Poppins', sans-serif;
    color: var(--texte);
    background: var(--fond);
    overflow-x: hidden;
}

/* ===== NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: clamp(11px, 1.6vw, 17px) clamp(18px, 3.5vw, 46px);
    z-index: 100;
    background: rgba(10, 37, 64, 0.45);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.logo { display: flex; align-items: center; }

.logo-text {
    font-size: clamp(17px, 1.5vw, 21px);
    font-weight: 800;
    color: var(--blanc);
    letter-spacing: -0.4px;
    white-space: nowrap;
}

.logo-accent { color: var(--cyan); }

.nav-menu { display: flex; gap: clamp(16px, 2.2vw, 32px); }

.nav-menu a {
    color: var(--blanc);
    text-decoration: none;
    font-size: clamp(12.5px, 0.95vw, 14px);
    font-weight: 500;
    opacity: 0.9;
    transition: opacity 0.2s ease;
    white-space: nowrap;
}

.nav-menu a:hover { opacity: 1; }

/* ===== BURGER ===== */
.burger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 26px; height: 19px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 300;
}

.burger span {
    display: block;
    width: 100%; height: 2.5px;
    background: var(--blanc);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* ===== BOUTONS ===== */
.btn {
    padding: 9px 20px;
    border: none;
    border-radius: 100px;
    font-family: 'Poppins', sans-serif;
    font-size: 13.5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
}

.btn-primary {
    background: var(--royal);
    color: var(--blanc);
    box-shadow: 0 4px 18px rgba(37, 99, 235, 0.28);
}

.btn-primary:hover {
    background: #1D4ED8;
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(37, 99, 235, 0.4);
}

.btn-large {
    padding: clamp(11px, 1.1vw, 13px) clamp(24px, 2.2vw, 30px);
    font-size: clamp(13.5px, 1vw, 15px);
}

/* ===== ACCUEIL ===== */
.hero {
    position: relative;
    height: 100vh; width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--royal), var(--cyan));
}

#hero-video {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    z-index: 1;
}

.hero::after {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(180deg, rgba(10, 37, 64, 0.42), rgba(10, 37, 64, 0.62));
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    padding: 0 20px;
    max-width: 720px;
}

.hero-title {
    font-size: clamp(29px, 4vw, 46px);
    font-weight: 800;
    color: var(--blanc);
    line-height: 1.1;
    letter-spacing: -1.2px;
    text-shadow: 0 4px 26px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: clamp(14px, 1.35vw, 17.5px);
    color: var(--blanc);
    margin-top: 15px;
    opacity: 0.95;
    text-shadow: 0 2px 18px rgba(0, 0, 0, 0.3);
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-top: clamp(24px, 3vw, 34px);
    flex-wrap: wrap;
}

.hero-link {
    color: var(--blanc);
    text-decoration: none;
    font-size: 14.5px;
    font-weight: 600;
    opacity: 0.9;
}

.hero-link:hover { opacity: 1; }

.scroll-hint {
    position: absolute;
    bottom: 26px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    color: var(--blanc);
    font-size: 22px;
    opacity: 0.8;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ============================================= */
/* ===== FONCTIONNALITÉS ======================= */
/* ============================================= */
.features {
    background: var(--fond);
    padding: clamp(56px, 7.5vw, 96px) clamp(20px, 5vw, 64px);
}

.features-head {
    max-width: 660px;
    margin: 0 auto;
    text-align: center;
}

.features-tag {
    display: inline-block;
    font-size: 10.5px;
    font-weight: 700;
    letter-spacing: 1.8px;
    text-transform: uppercase;
    color: var(--royal);
    background: rgba(37, 99, 235, 0.10);
    padding: 7px 15px;
    border-radius: 100px;
}

.features-title {
    font-size: clamp(23px, 2.9vw, 33px);
    font-weight: 800;
    color: var(--texte);
    letter-spacing: -0.8px;
    margin-top: 18px;
    line-height: 1.2;
}

.features-sub {
    font-size: clamp(14px, 1.25vw, 16px);
    color: var(--texte-doux);
    margin-top: 14px;
    line-height: 1.7;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(265px, 1fr));
    gap: 20px;
    max-width: 1050px;
    margin: clamp(38px, 5vw, 58px) auto 0;
}

.feature {
    position: relative;
    background: var(--carte);
    border: 1px solid var(--bord);
    border-radius: 16px;
    padding: 28px 24px 26px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.feature::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--royal), var(--cyan));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s ease;
}

.feature:hover::before { transform: scaleX(1); }

.feature:hover {
    transform: translateY(-6px);
    border-color: rgba(37, 99, 235, 0.28);
    box-shadow: 0 16px 38px rgba(10, 37, 64, 0.10);
}

.feature-num {
    display: block;
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.8px;
    background: linear-gradient(135deg, var(--royal), var(--cyan));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}

.feature-title {
    font-size: 16.5px;
    font-weight: 700;
    color: var(--texte);
    margin-top: 14px;
    letter-spacing: -0.2px;
}

.feature-text {
    font-size: 13.5px;
    color: var(--texte-doux);
    margin-top: 10px;
    line-height: 1.7;
}

.feature.cliquable { cursor: pointer; }

/* ===== SECTIONS SIMPLES ===== */
.section-block {
    min-height: 72vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--fond);
    padding: clamp(44px, 6vw, 78px) clamp(20px, 5vw, 64px);
}

.section-alt { background: var(--fond-2); }

.section-title {
    font-size: clamp(23px, 3vw, 34px);
    font-weight: 800;
    color: var(--texte);
    letter-spacing: -0.8px;
}

.section-text {
    font-size: clamp(14.5px, 1.35vw, 17px);
    color: var(--texte-doux);
    margin-top: 17px;
    max-width: 640px;
    line-height: 1.7;
}

/* ===== À PROPOS ===== */
.about {
    background: var(--fond-2);
    padding: clamp(56px, 7.5vw, 96px) clamp(20px, 5vw, 64px);
}

.about-intro { max-width: 700px; margin: 0 auto; text-align: center; }

.about-title {
    font-size: clamp(23px, 3vw, 32px);
    font-weight: 800;
    color: var(--texte);
    letter-spacing: -0.8px;
}

.about-text {
    font-size: clamp(14.5px, 1.35vw, 17px);
    color: var(--texte-doux);
    margin-top: 17px;
    line-height: 1.75;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 20px;
    max-width: 1050px;
    margin: clamp(38px, 5vw, 60px) auto 0;
}

.card {
    background: var(--carte);
    border-radius: 16px;
    padding: 28px 25px;
    border: 1px solid var(--bord);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(37, 99, 235, 0.28);
    box-shadow: 0 12px 34px rgba(10, 37, 64, 0.10);
}

.card-title {
    font-size: clamp(16.5px, 1.4vw, 18px);
    font-weight: 700;
    color: var(--texte);
}

.card-text {
    font-size: clamp(13.5px, 1.15vw, 14.5px);
    color: var(--texte-doux);
    margin-top: 11px;
    line-height: 1.7;
}

.about-values {
    max-width: 700px;
    margin: clamp(38px, 5vw, 68px) auto 0;
    text-align: center;
    padding: clamp(28px, 3.6vw, 42px) clamp(22px, 3.2vw, 40px);
    background: var(--bleu-fonce);
    border-radius: 20px;
}

.values-title {
    font-size: clamp(19px, 2.1vw, 24px);
    font-weight: 700;
    color: var(--blanc);
}

.values-text {
    font-size: clamp(14px, 1.25vw, 16px);
    color: var(--blanc);
    opacity: 0.9;
    margin-top: 13px;
    line-height: 1.75;
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ============================================= */
/* ===== SECTION TUTEUR ======================== */
/* ============================================= */
.tuteur-promo {
    background: var(--fond-2);
    padding: clamp(56px, 7.5vw, 96px) clamp(20px, 5vw, 64px);
    text-align: center;
}

.tuteur-promo-inner { max-width: 700px; margin: 0 auto; }

.tuteur-promo-title {
    font-size: clamp(23px, 2.9vw, 33px);
    font-weight: 800;
    color: var(--texte);
    letter-spacing: -0.8px;
    margin-top: 18px;
    line-height: 1.2;
}

.tuteur-promo-sub {
    font-size: clamp(14px, 1.25vw, 16px);
    color: var(--texte-doux);
    margin-top: 14px;
    line-height: 1.7;
}

.apercu {
    background: var(--t-fond);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 16px;
    overflow: hidden;
    margin: clamp(30px, 4vw, 44px) 0;
    text-align: left;
    box-shadow: 0 18px 45px rgba(10, 37, 64, 0.18);
}

.apercu-bar {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 11px 15px;
    background: var(--t-side);
    border-bottom: 1px solid var(--t-bord);
}

.apercu-dot {
    width: 9px; height: 9px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.16);
}

.apercu-nom {
    margin-left: auto;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--t-doux);
}

.apercu-corps {
    padding: 20px 18px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.apercu-user { display: flex; justify-content: flex-end; }

.apercu-user span {
    background: var(--royal);
    color: var(--blanc);
    padding: 10px 15px;
    border-radius: 16px;
    border-bottom-right-radius: 6px;
    font-size: 13px;
    line-height: 1.6;
    max-width: 80%;
}

.apercu-ia { display: flex; gap: 11px; align-items: flex-start; }

.apercu-avatar {
    width: 25px; height: 25px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--royal), var(--cyan));
    color: var(--blanc);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 11px;
    flex-shrink: 0;
    margin-top: 2px;
}

.apercu-txt {
    color: var(--t-texte);
    font-size: 13.3px;
    line-height: 1.75;
    white-space: pre-wrap;
}

.tuteur-promo-note {
    font-size: 12px;
    color: var(--texte-doux);
    margin-top: 14px;
    opacity: 0.85;
}

/* ============================================= */
/* ===== SECTION CV ============================ */
/* ============================================= */
.cv-promo {
    background: var(--fond);
    padding: clamp(56px, 7.5vw, 100px) clamp(20px, 5vw, 64px);
    text-align: left;
}

.cv-promo-inner {
    max-width: 1040px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(30px, 5vw, 64px);
    align-items: center;
}

.cv-promo-media {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cv-video-cadre {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 400px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(37, 99, 235, 0.18);
    background: var(--carte);
}

.cv-video {
    display: block;
    width: 100%;
    height: auto;
}

.cv-forme {
    position: absolute;
    border-radius: 22px;
    z-index: 1;
}

.cv-forme-a {
    width: 150px; height: 150px;
    background: rgba(37, 99, 235, 0.16);
    top: -18px; left: 0;
}

.cv-forme-b {
    width: 120px; height: 120px;
    border-radius: 50%;
    background: rgba(255, 122, 69, 0.22);
    bottom: -18px; right: 6px;
}

.cv-badge {
    display: inline-block;
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: 0.6px;
    color: var(--royal);
    background: rgba(37, 99, 235, 0.10);
    padding: 8px 16px;
    border-radius: 100px;
}

.cv-promo-title {
    font-size: clamp(24px, 3vw, 35px);
    font-weight: 800;
    color: var(--texte);
    letter-spacing: -0.9px;
    line-height: 1.22;
    margin-top: 18px;
}

.mot-accent { color: var(--orange); }

.cv-points {
    list-style: none;
    margin-top: 24px;
    padding: 0;
}

.cv-points li {
    display: flex;
    align-items: flex-start;
    gap: 13px;
    font-size: clamp(13.5px, 1.2vw, 15px);
    color: var(--texte-doux);
    line-height: 1.6;
    margin-bottom: 14px;
}

.cv-num {
    flex-shrink: 0;
    width: 26px; height: 26px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.12);
    color: var(--royal);
    font-size: 12.5px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1px;
}

.cv-promo-btn {
    display: inline-block;
    margin-top: 12px;
    padding: 14px 32px;
    background: var(--royal);
    color: #fff;
    border-radius: 100px;
    font-family: 'Poppins', sans-serif;
    font-size: clamp(14px, 1.1vw, 15.5px);
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 6px 22px rgba(37, 99, 235, 0.3);
    transition: all 0.25s ease;
}

.cv-promo-btn:hover {
    background: #1D4ED8;
    transform: translateY(-2px);
    box-shadow: 0 9px 28px rgba(37, 99, 235, 0.42);
}

.cv-promo-note {
    font-size: 12px;
    color: var(--texte-doux);
    margin-top: 14px;
    opacity: 0.85;
}

/* ============================================= */
/* ===== INSCRIPTION / CONNEXION =============== */
/* ============================================= */
.nav-auth {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-connexion {
    background: transparent;
    border: none;
    color: var(--blanc);
    font-family: 'Poppins', sans-serif;
    font-size: clamp(12.5px, 0.95vw, 14px);
    font-weight: 600;
    cursor: pointer;
    opacity: 0.9;
    transition: opacity 0.2s ease;
    white-space: nowrap;
}

.btn-connexion:hover { opacity: 1; }

.btn-inscription {
    padding: 8px 18px;
    font-size: clamp(12.5px, 0.95vw, 14px);
    white-space: nowrap;
}

.nav-user {
    display: none;
    align-items: center;
    gap: 11px;
}

.nav-user.actif { display: flex; }
.nav-auth.cache { display: none; }

.user-nom {
    color: var(--blanc);
    font-size: clamp(12.5px, 0.95vw, 14px);
    font-weight: 600;
    white-space: nowrap;
}

.user-rond {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--royal), var(--cyan));
    color: var(--blanc);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 14px;
    flex-shrink: 0;
}

.btn-deco {
    background: rgba(255, 255, 255, 0.14);
    border: none;
    color: var(--blanc);
    font-family: 'Poppins', sans-serif;
    font-size: 12.5px;
    font-weight: 600;
    padding: 7px 14px;
    border-radius: 100px;
    cursor: pointer;
    transition: background 0.2s ease;
    white-space: nowrap;
}

.btn-deco:hover { background: rgba(255, 255, 255, 0.24); }

.auth-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(10, 37, 64, 0.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-overlay.open { display: flex; }

.auth-box {
    background: var(--blanc);
    border-radius: 22px;
    padding: clamp(28px, 4vw, 40px) clamp(24px, 3.5vw, 38px);
    width: 100%;
    max-width: 400px;
    position: relative;
    box-shadow: 0 30px 80px rgba(10, 37, 64, 0.28);
    animation: authPop 0.25s ease;
}

@keyframes authPop {
    from { opacity: 0; transform: translateY(14px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.auth-x {
    position: absolute;
    top: 16px; right: 18px;
    background: transparent;
    border: none;
    color: #9aa8b6;
    font-size: 18px;
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s ease;
}

.auth-x:hover { color: var(--texte); }

.auth-titre {
    font-size: clamp(22px, 2.6vw, 27px);
    font-weight: 800;
    color: var(--texte);
    letter-spacing: -0.6px;
}

.auth-sous {
    font-size: 14px;
    color: var(--texte-doux);
    margin-top: 7px;
    line-height: 1.6;
}

.auth-google {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 11px;
    width: 100%;
    margin-top: 24px;
    padding: 13px;
    background: var(--blanc);
    border: 1.5px solid #dbe3ec;
    border-radius: 12px;
    font-family: 'Poppins', sans-serif;
    font-size: 14.5px;
    font-weight: 600;
    color: var(--texte);
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.auth-google:hover { background: var(--fond); border-color: #c3cfdb; }

.auth-ou {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 20px 0;
    color: #9aa8b6;
    font-size: 12.5px;
}

.auth-ou::before, .auth-ou::after {
    content: "";
    flex: 1;
    height: 1px;
    background: #e4eaf1;
}

.auth-input {
    width: 100%;
    padding: 13px 16px;
    margin-bottom: 12px;
    border: 1.5px solid #dbe3ec;
    border-radius: 12px;
    font-family: 'Poppins', sans-serif;
    font-size: 14.5px;
    color: var(--texte);
    outline: none;
    transition: border-color 0.2s ease;
}

.auth-input:focus { border-color: var(--royal); }
.auth-input::placeholder { color: #9aa8b6; }

.auth-erreur {
    color: #E5484D;
    font-size: 13px;
    margin: 2px 0 12px;
    min-height: 18px;
    line-height: 1.5;
}

.auth-valider {
    width: 100%;
    padding: 14px;
    font-size: 15px;
}

.auth-bascule {
    text-align: center;
    margin-top: 18px;
    font-size: 13.5px;
    color: var(--texte-doux);
}

.auth-bascule button {
    background: transparent;
    border: none;
    color: var(--royal);
    font-family: 'Poppins', sans-serif;
    font-size: 13.5px;
    font-weight: 700;
    cursor: pointer;
    padding: 0 2px;
}

.auth-bascule button:hover { text-decoration: underline; }

/* ============================================= */
/* ===== TUTEUR ASTON ========================== */
/* ============================================= */
.tutor {
    position: fixed;
    inset: 0;
    z-index: 900;
    display: flex;
    background: var(--t-fond);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s;
}

.tutor.open { opacity: 1; visibility: visible; }

.tutor-side {
    width: 240px;
    flex-shrink: 0;
    background: var(--t-side);
    border-right: 1px solid var(--t-bord);
    display: flex;
    flex-direction: column;
    padding: 17px 12px;
    transition: transform 0.3s ease;
}

.side-top { padding: 2px 8px 15px; }

.side-logo {
    font-size: 17px;
    font-weight: 800;
    color: var(--t-texte);
    letter-spacing: -0.4px;
}

.side-new {
    display: flex;
    align-items: center;
    gap: 9px;
    width: 100%;
    padding: 10px 14px;
    background: var(--t-carte);
    border: 1px solid var(--t-bord);
    border-radius: 100px;
    color: var(--t-texte);
    font-family: 'Poppins', sans-serif;
    font-size: 12.5px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease;
}

.side-new:hover { background: #1A3A5C; }

.side-ico { font-size: 13px; opacity: 0.9; }

.side-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--t-doux);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 20px 10px 7px;
    opacity: 0.8;
}

.side-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding-bottom: 10px;
}

.side-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 11px;
    border-radius: 9px;
    cursor: pointer;
    transition: background 0.2s ease;
}

.side-item:hover { background: var(--t-carte); }
.side-item.active { background: var(--t-carte); }

.side-item-txt {
    flex: 1;
    font-size: 12px;
    font-weight: 500;
    color: var(--t-doux);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.side-item:hover .side-item-txt,
.side-item.active .side-item-txt { color: var(--t-texte); }

.side-del {
    background: transparent;
    border: none;
    color: var(--t-doux);
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    opacity: 0;
    padding: 2px 4px;
    border-radius: 6px;
    transition: opacity 0.2s ease, color 0.2s ease;
}

.side-item:hover .side-del { opacity: 0.7; }
.side-del:hover { color: #FF9A93; opacity: 1; }

.side-vide {
    font-size: 11.5px;
    color: var(--t-doux);
    padding: 8px 11px;
    opacity: 0.6;
    line-height: 1.6;
}

.tutor-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.tutor-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 20px;
    flex-shrink: 0;
}

.tutor-menu {
    display: none;
    background: transparent;
    border: none;
    color: var(--t-texte);
    font-size: 18px;
    cursor: pointer;
}

.tutor-close {
    margin-left: auto;
    background: var(--t-carte);
    border: 1px solid var(--t-bord);
    color: var(--t-doux);
    padding: 7px 14px;
    border-radius: 100px;
    font-family: 'Poppins', sans-serif;
    font-size: 11.5px;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s ease, background 0.2s ease;
}

.tutor-close:hover { color: var(--t-texte); background: #1A3A5C; }

.tutor-welcome {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px 22px;
    text-align: center;
}

.tutor-welcome.hidden { display: none; }

.welcome-title {
    font-size: clamp(22px, 2.9vw, 32px);
    font-weight: 700;
    letter-spacing: -0.8px;
    background: linear-gradient(100deg, var(--bleu-vif), var(--cyan), #7FDBFF);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-sub {
    font-size: clamp(12.5px, 1.1vw, 14px);
    color: var(--t-doux);
    margin-top: 10px;
}

.chips {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 9px;
    margin-top: 30px;
    max-width: 600px;
}

.chip {
    background: var(--t-carte);
    border: 1px solid var(--t-bord);
    color: var(--t-doux);
    padding: 9px 15px;
    border-radius: 100px;
    font-family: 'Poppins', sans-serif;
    font-size: 11.5px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.chip:hover {
    background: #1A3A5C;
    color: var(--t-texte);
    border-color: var(--bleu-vif);
}

.tutor-thread {
    flex: 1;
    overflow-y: auto;
    padding: 10px 22px 18px;
    display: none;
    flex-direction: column;
    gap: 22px;
}

.tutor-thread.active { display: flex; }

.turn { max-width: 700px; width: 100%; margin: 0 auto; }

.turn-user { display: flex; justify-content: flex-end; }

.turn-user span {
    background: var(--royal);
    color: var(--blanc);
    padding: 11px 16px;
    border-radius: 16px;
    border-bottom-right-radius: 6px;
    font-size: 13px;
    line-height: 1.6;
    max-width: 85%;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.turn-ia { display: flex; gap: 12px; align-items: flex-start; }

.turn-avatar {
    width: 26px; height: 26px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--royal), var(--cyan));
    color: var(--blanc);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 11.5px;
    flex-shrink: 0;
    margin-top: 2px;
}

.turn-txt {
    color: var(--t-texte);
    font-size: 13.3px;
    line-height: 1.75;
    white-space: pre-wrap;
    word-wrap: break-word;
    padding-top: 3px;
}

.turn-txt.erreur { color: #FF9A93; }

.dots { display: flex; gap: 6px; padding: 10px 0 4px; }

.dots span {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--cyan);
    opacity: 0.4;
    animation: blink 1.3s infinite;
}

.dots span:nth-child(2) { animation-delay: 0.2s; }
.dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes blink {
    0%, 60%, 100% { opacity: 0.25; transform: translateY(0); }
    30% { opacity: 1; transform: translateY(-4px); }
}

.tutor-composer {
    flex-shrink: 0;
    padding: 11px 22px 17px;
}

.composer-box {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    align-items: flex-end;
    gap: 9px;
    background: var(--t-carte);
    border: 1px solid var(--t-bord);
    border-radius: 24px;
    padding: 6px 6px 6px 18px;
    transition: border-color 0.2s ease;
}

.composer-box:focus-within { border-color: var(--bleu-vif); }

.composer-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    color: var(--t-texte);
    font-family: 'Poppins', sans-serif;
    font-size: 13.3px;
    line-height: 1.6;
    padding: 10px 0;
    max-height: 140px;
}

.composer-input::placeholder { color: var(--t-doux); }

.composer-send {
    width: 35px; height: 35px;
    border-radius: 50%;
    border: none;
    background: var(--royal);
    color: var(--blanc);
    font-size: 15px;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.2s ease, transform 0.2s ease;
}

.composer-send:hover { background: #1D4ED8; transform: scale(1.06); }
.composer-send:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.composer-note {
    text-align: center;
    font-size: 10.5px;
    color: var(--t-doux);
    margin-top: 10px;
    opacity: 0.7;
}

/* ===== MOBILE ===== */
@media (max-width: 900px) {
    .burger { display: flex; }

    .nav-menu {
        position: fixed;
        top: 66px; right: 18px;
        width: 205px;
        flex-direction: column;
        align-items: flex-start;
        gap: 3px;
        padding: 11px;
        background: rgba(10, 37, 64, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-radius: 14px;
        box-shadow: 0 20px 50px rgba(10, 37, 64, 0.35);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
        z-index: 150;
    }

    .nav-menu.open { opacity: 1; visibility: visible; transform: translateY(0); }
    .nav-menu a { font-size: 14.5px; width: 100%; padding: 11px 13px; border-radius: 9px; }
    .nav-menu a:hover { background: rgba(255, 255, 255, 0.1); }

    .burger.open span:nth-child(1) { transform: translateY(8.2px) rotate(45deg); }
    .burger.open span:nth-child(2) { opacity: 0; }
    .burger.open span:nth-child(3) { transform: translateY(-8.2px) rotate(-45deg); }

    .feature { padding: 24px 20px 22px; }
    .feature-num { font-size: 23px; }

    .nav-auth { gap: 8px; }
    .btn-connexion { display: none; }

    .cv-promo-inner { grid-template-columns: 1fr; }
    .cv-promo-media { order: -1; }
    .cv-promo { text-align: center; }
    .cv-points li { text-align: left; }
    .cv-video-cadre { max-width: 340px; }

    .apercu-corps { padding: 16px 14px; gap: 15px; }
    .apercu-user span, .apercu-txt { font-size: 12.5px; }

    .tutor-side {
        position: absolute;
        top: 0; left: 0;
        height: 100%;
        z-index: 20;
        transform: translateX(-100%);
        box-shadow: 20px 0 60px rgba(0, 0, 0, 0.5);
    }

    .tutor-side.open { transform: translateX(0); }
    .tutor-menu { display: block; }
    .side-del { opacity: 0.6; }

    .tutor-top { padding: 11px 14px; }
    .tutor-thread { padding: 10px 14px 18px; }
    .tutor-composer { padding: 9px 12px 14px; }
    .composer-box { padding-left: 15px; }
    .chips { gap: 7px; margin-top: 24px; }
    .chip { font-size: 11px; padding: 8px 13px; }
}/* ============================================= */
/* ===== LOGO CLIQUABLE + MENU COMPTE ========== */
/* ============================================= */
.logo {
    text-decoration: none;
    transition: opacity 0.2s ease;
}
.logo:hover { opacity: 0.85; }

.nav-user {
    position: relative;
    display: none;
    align-items: center;
}
.nav-user.actif { display: flex; }

.user-bouton {
    display: flex;
    align-items: center;
    gap: 9px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 100px;
    padding: 4px 13px 4px 4px;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.user-bouton:hover,
.user-bouton.actif {
    background: rgba(255, 255, 255, 0.22);
    border-color: rgba(255, 255, 255, 0.32);
}

.user-fleche {
    color: var(--blanc);
    font-size: 11px;
    opacity: 0.8;
    transition: transform 0.2s ease;
}
.user-bouton.actif .user-fleche { transform: rotate(180deg); }

.user-menu {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    width: 250px;
    background: var(--blanc);
    border: 1px solid rgba(10, 37, 64, 0.08);
    border-radius: 16px;
    padding: 7px;
    box-shadow: 0 18px 46px rgba(10, 37, 64, 0.20);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
    z-index: 200;
}

.user-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-menu-tete {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 11px 12px 13px;
}

.user-rond.grand {
    width: 38px; height: 38px;
    font-size: 16px;
}

.user-menu-infos { min-width: 0; }

.user-menu-nom {
    font-size: 13.5px;
    font-weight: 700;
    color: var(--texte);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-menu-mail {
    font-size: 11.5px;
    color: var(--texte-doux);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-menu-sep {
    height: 1px;
    background: rgba(10, 37, 64, 0.08);
    margin: 4px 6px;
}

.user-menu-item {
    display: block;
    width: 100%;
    text-align: left;
    background: transparent;
    border: none;
    border-radius: 10px;
    padding: 10px 12px;
    font-family: 'Poppins', sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: var(--texte);
    text-decoration: none;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
}

.user-menu-item:hover {
    background: var(--fond);
    color: var(--royal);
}

.user-menu-item.deco { color: #D4373C; }
.user-menu-item.deco:hover { background: rgba(212, 55, 60, 0.08); color: #D4373C; }

@media (max-width: 900px) {
    .user-bouton .user-nom,
    .user-bouton .user-fleche { display: none; }
    .user-bouton { padding: 4px; }
    .user-menu { width: 230px; }
}/* ============================================= */
/* ===== FONCTIONNALITÉS EN 3D ================= */
/* ============================================= */
.features {
    background:
        radial-gradient(820px 380px at 50% -8%, rgba(37, 99, 235, 0.13), transparent 68%),
        linear-gradient(180deg, #E3EDF9 0%, #EFF5FC 45%, #E3EDF9 100%);
    perspective: 1400px;
}

.features-grid {
    perspective: 1400px;
    gap: 26px;
}

.feature {
    position: relative;
    overflow: visible;
    border-radius: 18px;
    padding: 30px 26px 28px;
    background: linear-gradient(158deg, #FFFFFF 0%, #FDFEFF 52%, #EFF5FD 100%);
    border: 1px solid rgba(255, 255, 255, 0.9);
    transform-style: preserve-3d;
    transform: perspective(1400px) rotateX(0deg) rotateY(0deg) translateZ(0);
    box-shadow:
        0 1px 2px rgba(10, 37, 64, 0.05),
        0 4px 9px rgba(10, 37, 64, 0.05),
        0 11px 24px rgba(10, 37, 64, 0.07),
        0 24px 52px rgba(10, 37, 64, 0.09),
        inset 0 1px 0 rgba(255, 255, 255, 1);
    will-change: transform;
}

.feature.reveal {
    transition:
        opacity 0.7s ease,
        transform 0.5s cubic-bezier(.2, .7, .3, 1),
        box-shadow 0.4s ease;
}

.feature.tilt {
    transition: transform 0.1s linear, box-shadow 0.3s ease;
}

.feature:hover {
    border-color: rgba(255, 255, 255, 1);
    box-shadow:
        0 2px 4px rgba(10, 37, 64, 0.06),
        0 8px 16px rgba(10, 37, 64, 0.07),
        0 20px 40px rgba(10, 37, 64, 0.11),
        0 40px 80px rgba(37, 99, 235, 0.16),
        inset 0 1px 0 rgba(255, 255, 255, 1);
}

/* Trait dégradé du haut */
.feature::before {
    border-radius: 18px 18px 0 0;
    z-index: 3;
}

/* Halo qui suit le curseur */
.feature::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(
        340px circle at var(--mx, 50%) var(--my, 0%),
        rgba(37, 99, 235, 0.14),
        transparent 62%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 0;
}

.feature:hover::after { opacity: 1; }

/* Les couches qui donnent la profondeur */
.feature-num {
    position: relative;
    z-index: 2;
    font-size: 30px;
    transform: translateZ(48px);
}

.feature-title {
    position: relative;
    z-index: 2;
    transform: translateZ(30px);
}

.feature-text {
    position: relative;
    z-index: 2;
    transform: translateZ(15px);
}

@media (max-width: 900px) {
    .feature {
        transform: none !important;
        padding: 26px 22px 24px;
        box-shadow:
            0 2px 6px rgba(10, 37, 64, 0.06),
            0 10px 26px rgba(10, 37, 64, 0.09);
    }
    .feature-num { font-size: 26px; transform: none; }
    .feature-title, .feature-text { transform: none; }
}

@media (prefers-reduced-motion: reduce) {
    .feature { transform: none !important; }
    .feature-num, .feature-title, .feature-text { transform: none; }
}