/* ---------------------------------------------------------------
   Essai « Marée nocturne » : la mangrove de nuit.
   Eau noire, plancton bioluminescent, panneaux en verre dépoli.
   --------------------------------------------------------------- */

@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&display=swap");

:root {
    --abysse: #040b11;
    --eau: #0a1a26;
    --verre: rgba(16, 38, 52, .55);
    --ligne: rgba(126, 232, 214, .16);
    --bio: #5ef2d0;
    --bio-2: #8fa8ff;
    --texte: #d7e6ee;
    --pale: #86a0ae;
    --police: "Space Grotesk", system-ui, sans-serif;
    --largeur: 1140px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(1200px 600px at 80% -10%, rgba(94, 242, 208, .10), transparent 60%),
        radial-gradient(900px 500px at -10% 40%, rgba(143, 168, 255, .08), transparent 60%),
        var(--abysse);
    background-attachment: fixed;
    color: var(--texte);
    font: 17px/1.6 var(--police);
}

a {
    color: var(--bio);
}

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

.saut {
    position: absolute;
    left: -9999px;
}

.saut:focus {
    left: 16px;
    top: 16px;
    z-index: 10;
    padding: 8px 12px;
    background: var(--bio);
    color: var(--abysse);
}

.bloc {
    scroll-margin-top: 90px;
}

/* --- Navigation : une pilule flottante --- */

.site-nav {
    position: fixed;
    top: 16px;
    left: 50%;
    z-index: 5;
    display: flex;
    align-items: center;
    gap: 20px;
    width: min(calc(100% - 32px), 860px);
    padding: 10px 12px 10px 22px;
    transform: translateX(-50%);
    background: var(--verre);
    border: 1px solid var(--ligne);
    border-radius: 999px;
    backdrop-filter: blur(14px);
}

.marque {
    color: var(--texte);
    font-weight: 700;
    text-decoration: none;
    letter-spacing: .04em;
}

.marque::before {
    content: "";
    display: inline-block;
    width: 8px;
    height: 8px;
    margin-right: 10px;
    border-radius: 50%;
    background: var(--bio);
    box-shadow: 0 0 12px var(--bio);
    vertical-align: middle;
}

.nav-liens {
    display: flex;
    gap: 6px;
    margin: 0 0 0 auto;
    padding: 0;
    list-style: none;
}

.nav-liens a {
    white-space: nowrap;
    padding: 6px 12px;
    border-radius: 999px;
    color: var(--pale);
    font-size: .92rem;
    text-decoration: none;
}

.nav-liens a:hover {
    background: rgba(94, 242, 208, .08);
    color: var(--texte);
}

.nav-action {
    padding: 8px 16px;
    border-radius: 999px;
    background: var(--bio);
    color: var(--abysse);
    font-weight: 700;
    font-size: .9rem;
    text-decoration: none;
}

/* --- Hero : l'image devient l'eau sombre derrière le titre --- */

.hero {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 100vh;
    padding: 140px 16px 96px;
    overflow: hidden;
    text-align: center;
    isolation: isolate;
}

.hero-visuel {
    position: absolute;
    inset: 0;
    z-index: -2;
    margin: 0;
}

.hero-visuel img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: .28;
    filter: saturate(.6) hue-rotate(-20deg);
    mask-image: linear-gradient(180deg, #000 40%, transparent);
}

.hero-visuel figcaption {
    display: none;
}

/* Le plancton : des points lumineux qui dérivent lentement */
.hero::before,
.hero::after {
    content: "";
    position: absolute;
    inset: -50%;
    z-index: -1;
    background-image:
        radial-gradient(2px 2px at 20% 30%, var(--bio), transparent),
        radial-gradient(1.5px 1.5px at 70% 60%, var(--bio-2), transparent),
        radial-gradient(2px 2px at 40% 80%, var(--bio), transparent),
        radial-gradient(1px 1px at 85% 20%, #fff, transparent),
        radial-gradient(1.5px 1.5px at 10% 70%, var(--bio-2), transparent);
    background-size: 340px 340px;
    opacity: .7;
    animation: derive 60s linear infinite;
}

.hero::after {
    background-size: 520px 520px;
    opacity: .4;
    animation-duration: 95s;
    animation-direction: reverse;
}

@keyframes derive {
    to {
        transform: translate(120px, -80px);
    }
}

.hero-texte {
    max-width: 760px;
}

.hero-surtitre {
    display: inline-block;
    margin: 0 0 20px;
    padding: 4px 14px;
    border: 1px solid var(--ligne);
    border-radius: 999px;
    color: var(--bio);
    font-size: .85rem;
    letter-spacing: .14em;
    text-transform: uppercase;
}

.hero-titre {
    margin: 0;
    background: linear-gradient(120deg, #ffffff 10%, var(--bio) 55%, var(--bio-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-size: clamp(3.2rem, 11vw, 7.5rem);
    font-weight: 700;
    line-height: 1;
    letter-spacing: -.04em;
    filter: drop-shadow(0 0 30px rgba(94, 242, 208, .25));
}

.hero-intro {
    max-width: 52ch;
    margin: 24px auto 36px;
    color: var(--pale);
    font-size: 1.15rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

/* --- Boutons --- */

.page-contenu .btn,
.bouton {
    display: inline-block;
    padding: 12px 24px;
    border: 1px solid var(--bio);
    border-radius: 999px;
    background: var(--bio);
    color: var(--abysse);
    font: 700 1rem var(--police);
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 0 24px rgba(94, 242, 208, .35);
    transition: box-shadow .2s, transform .2s;
}

.page-contenu .btn:hover,
.bouton:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 36px rgba(94, 242, 208, .55);
}

.bouton-discret {
    background: transparent;
    border-color: var(--ligne);
    color: var(--texte);
    box-shadow: none;
}

/* --- Blocs --- */

.bloc {
    max-width: var(--largeur);
    margin: 0 auto;
    padding: 88px 16px;
}

.bloc-entete {
    margin-bottom: 40px;
}

.bloc-numero {
    color: var(--bio);
    font-size: .85rem;
    letter-spacing: .2em;
}

.bloc-numero::before {
    content: "// ";
    opacity: .6;
}

.bloc-entete h2 {
    margin: 6px 0 8px;
    font-size: clamp(2rem, 5vw, 3rem);
    letter-spacing: -.02em;
}

.bloc-chapo {
    margin: 0;
    color: var(--pale);
}

/* Cartes en verre */
.page-contenu .grid,
.grille-articles,
.grille-pages {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
    gap: 18px;
}

.page-contenu .item,
.carte-article,
.tuile-page {
    position: relative;
    padding: 24px;
    background: var(--verre);
    border: 1px solid var(--ligne);
    border-radius: 18px;
    backdrop-filter: blur(10px);
    transition: border-color .25s, transform .25s, box-shadow .25s;
}

.page-contenu .item:hover,
.carte-article:hover,
.tuile-page:hover {
    transform: translateY(-4px);
    border-color: rgba(94, 242, 208, .5);
    box-shadow: 0 0 0 1px rgba(94, 242, 208, .2), 0 20px 40px -20px rgba(94, 242, 208, .35);
}

.carte-meta {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    color: var(--pale);
    font-size: .8rem;
}

.carte-lieu {
    color: var(--bio-2);
}

.carte-article h3 {
    margin: 12px 0 8px;
    font-size: 1.3rem;
}

.carte-article h3 a {
    color: var(--texte);
    text-decoration: none;
}

/* Toute la carte est cliquable */
.carte-article h3 a::after {
    content: "";
    position: absolute;
    inset: 0;
}

.carte-article p {
    margin: 0 0 16px;
    color: var(--pale);
}

.carte-lien {
    font-size: .9rem;
    font-weight: 700;
    text-decoration: none;
}

.tuile-page {
    display: flex;
    flex-direction: column;
    gap: 6px;
    color: var(--texte);
    text-decoration: none;
}

.tuile-icone {
    font-size: 2rem;
    filter: drop-shadow(0 0 10px rgba(94, 242, 208, .5));
}

.tuile-page strong {
    font-size: 1.15rem;
}

.tuile-texte {
    color: var(--pale);
    font-size: .95rem;
}

/* À propos */
.colonnes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
    gap: 18px;
    margin-bottom: 28px;
}

.colonne {
    padding: 28px;
    background: linear-gradient(180deg, rgba(94, 242, 208, .06), transparent);
    border: 1px solid var(--ligne);
    border-radius: 18px;
}

.colonne h3 {
    margin: 0 0 10px;
    color: var(--bio);
}

.colonne p {
    margin: 0;
    color: var(--pale);
}

/* Contact */
.formulaire {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    max-width: 760px;
    padding: 28px;
    background: var(--verre);
    border: 1px solid var(--ligne);
    border-radius: 22px;
}

.champ-large,
.formulaire-note {
    grid-column: 1 / -1;
}

.page-contenu .form-label,
.champ label {
    display: block;
    margin-bottom: 6px;
    color: var(--pale);
    font-size: .85rem;
}

.page-contenu .form-control,
.champ input,
.champ textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--ligne);
    border-radius: 12px;
    background: rgba(4, 11, 17, .6);
    color: var(--texte);
    font: 1rem var(--police);
}

.page-contenu .form-control:focus,
.champ input:focus,
.champ textarea:focus {
    outline: none;
    border-color: var(--bio);
    box-shadow: 0 0 0 4px rgba(94, 242, 208, .15);
}

.formulaire .bouton {
    justify-self: start;
}

.formulaire-note,
.vide {
    margin: 0;
    color: var(--pale);
}

/* --- Pied de page --- */

.site-pied {
    margin-top: 40px;
    padding: 56px max(16px, calc((100% - var(--largeur)) / 2)) 28px;
    border-top: 1px solid var(--ligne);
    background: linear-gradient(180deg, transparent, rgba(94, 242, 208, .05));
}

.pied-colonnes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 32px;
}

.pied-colonnes h4 {
    margin: 0 0 8px;
    color: var(--bio);
    font-size: .85rem;
    letter-spacing: .14em;
    text-transform: uppercase;
}

.pied-colonnes p {
    margin: 0;
    color: var(--pale);
}

.reseaux {
    display: flex;
    gap: 14px;
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 1.5rem;
}

.reseaux a {
    color: var(--pale);
}

.reseaux a:hover {
    color: var(--bio);
}

.pied-copyright {
    margin: 40px 0 0;
    color: var(--pale);
    font-size: .85rem;
    text-align: center;
}

/* --- Les vraies pages du site, vues à travers le labo ---
   (list.php, article.php, newArticle.php...) Leur HTML n'est pas fait
   pour le labo : on habille leurs balises et les quelques classes
   Bootstrap qu'elles utilisent. Les boutons, champs et cartes
   partagent les règles plus haut (.page-contenu .btn, .form-control,
   .item...). */

.page-contenu {
    max-width: var(--largeur);
    margin: 0 auto;
    padding: 150px 16px 96px;
}

.page-contenu h1 {
    margin: 0 0 40px;
    background: linear-gradient(120deg, #ffffff 10%, var(--bio) 60%, var(--bio-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-size: clamp(2.2rem, 6vw, 3.8rem);
    line-height: 1.1;
    letter-spacing: -.03em;
}

.page-contenu h1 i {
    margin-right: .4em;
    color: var(--bio);
    font-size: .55em;
    vertical-align: middle;
}

.page-contenu > h2 {
    margin: 0 0 24px;
    font-size: clamp(2rem, 5vw, 3rem);
    letter-spacing: -.02em;
}

.page-contenu > p {
    max-width: 65ch;
    margin: 0 0 1.2em;
    color: var(--texte);
}

.page-contenu .item .image {
    display: none;
}

.page-contenu .item h2 {
    margin: 0 0 8px;
    font-size: 1.3rem;
}

.page-contenu .item p {
    margin: 0 0 16px;
    color: var(--pale);
}

.page-contenu .item a {
    font-weight: 700;
    text-decoration: none;
}

.page-contenu .item a::after {
    content: "";
    position: absolute;
    inset: 0;
}

.page-contenu .item a i {
    margin-right: 6px;
}

.page-contenu form {
    max-width: 680px;
    padding: 28px;
    background: var(--verre);
    border: 1px solid var(--ligne);
    border-radius: 22px;
}

.page-contenu .mb-3 {
    margin-bottom: 18px;
}

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

.page-contenu select.form-control option {
    background: var(--eau);
    color: var(--texte);
}

.page-contenu .alert {
    max-width: 680px;
    margin: 0 0 24px;
    padding: 14px 18px;
    border: 1px solid rgba(94, 242, 208, .4);
    border-radius: 14px;
    background: rgba(94, 242, 208, .08);
}

.page-contenu .alert-danger {
    border-color: rgba(255, 120, 120, .5);
    background: rgba(255, 120, 120, .08);
}

/* --- Petits écrans --- */

@media (max-width: 800px) {
    .site-nav {
        border-radius: 22px;
        flex-wrap: wrap;
        gap: 8px;
        padding: 10px 14px;
    }

    .nav-liens {
        order: 3;
        width: 100%;
        margin: 0;
        overflow-x: auto;
    }

    .nav-action {
        margin-left: auto;
    }

    .hero {
        padding-top: 170px;
    }

    .formulaire {
        grid-template-columns: 1fr;
        padding: 20px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .hero::before,
    .hero::after {
        animation: none;
    }

    html {
        scroll-behavior: auto;
    }
}