/* ===========================================================================
   Terra Mathica — Feuille de style principale
   Thème « terre des maths » : tons terre/émeraude + accents ludiques.
   =========================================================================== */

:root {
    --c-emerald:    #0f766e;
    --c-emerald-dk: #0b574f;
    --c-emerald-lt: #14b8a6;
    --c-amber:      #f59e0b;
    --c-amber-dk:   #d97706;
    --c-violet:     #7c3aed;
    --c-ink:        #1f2937;
    --c-ink-soft:   #4b5563;
    --c-muted:      #6b7280;
    --c-line:       #e5e7eb;
    --c-bg:         #f4f7f6;
    --c-card:       #ffffff;
    --c-success:    #16a34a;
    --c-error:      #dc2626;

    --radius:    14px;
    --radius-lg: 22px;
    --shadow:    0 6px 24px rgba(15, 118, 110, .10);
    --shadow-lg: 0 18px 48px rgba(15, 23, 42, .18);
    --grad-terra: linear-gradient(135deg, #0f766e 0%, #14b8a6 55%, #34d399 100%);
    --grad-game:  linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);

    --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: var(--font);
    color: var(--c-ink);
    background: var(--c-bg);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--c-emerald); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; color: var(--c-ink); }
img { max-width: 100%; display: block; }

.container { width: min(1140px, 92%); margin-inline: auto; }

/* ----------------------------- Boutons ---------------------------------- */
.btn {
    display: inline-flex; align-items: center; gap: .5rem;
    padding: .7rem 1.25rem; border-radius: 999px;
    font-weight: 600; font-size: .95rem; cursor: pointer;
    border: 2px solid transparent; transition: transform .12s ease, box-shadow .2s ease, background .2s;
    text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--grad-terra); color: #fff; box-shadow: var(--shadow); }
.btn--accent  { background: var(--c-amber); color: #3a2a00; }
.btn--game    { background: var(--grad-game); color: #fff; }
.btn--ghost   { background: transparent; border-color: transparent; color: inherit; }
.btn--outline { background: #fff; border-color: var(--c-line); color: var(--c-ink); }
.btn--danger  { background: #fee2e2; color: var(--c-error); }
.btn--sm      { padding: .4rem .8rem; font-size: .85rem; }
.btn--block   { width: 100%; justify-content: center; }
.btn[disabled] { opacity: .6; cursor: not-allowed; }

.inline-form { display: inline; margin: 0; }

/* ----------------------------- Topbar (public) -------------------------- */
.topbar { background: #fff; border-bottom: 1px solid var(--c-line); position: sticky; top: 0; z-index: 50; }
.topbar__inner { display: flex; align-items: center; justify-content: space-between; padding: .8rem 0; }
.topbar__nav { display: flex; align-items: center; gap: 1rem; }
.topbar__nav a { color: var(--c-ink-soft); font-weight: 600; }

.brand { display: inline-flex; align-items: center; gap: .55rem; font-weight: 800; color: var(--c-emerald-dk); }
.brand:hover { text-decoration: none; }
.brand__logo { font-size: 1.5rem; }
.brand__name { font-size: 1.15rem; letter-spacing: -.02em; }
.brand--center { justify-content: center; margin-bottom: 1.4rem; font-size: 1.3rem; }

.main { padding: 2.2rem 0 3rem; }
.footer { border-top: 1px solid var(--c-line); background: #fff; margin-top: auto; }
.footer__inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .6rem; padding: 1.2rem 0; color: var(--c-muted); font-size: .9rem; }
.footer__inner nav { display: flex; gap: 1rem; }

/* ----------------------------- Hero (accueil) --------------------------- */
.hero {
    background: var(--grad-terra); color: #fff; border-radius: var(--radius-lg);
    padding: 3rem 2.4rem; position: relative; overflow: hidden; box-shadow: var(--shadow-lg);
}
.hero::after {
    content: "∑ π √ ∞ × ÷ Δ"; position: absolute; right: -10px; bottom: -10px;
    font-size: 5rem; opacity: .12; font-weight: 800; letter-spacing: .3rem;
}
.hero h1 { color: #fff; font-size: clamp(1.9rem, 4vw, 3rem); margin: 0 0 .6rem; }
.hero p { font-size: 1.15rem; max-width: 46ch; opacity: .95; }
.hero__cta { margin-top: 1.6rem; display: flex; gap: .8rem; flex-wrap: wrap; }

.section-title { display: flex; align-items: center; justify-content: space-between; margin: 2.4rem 0 1rem; }
.section-title h2 { font-size: 1.5rem; margin: 0; }

/* ----------------------------- Cartes de jeu ---------------------------- */
.grid-jeux { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1.3rem; }

.jeu-card {
    background: var(--c-card); border-radius: var(--radius); overflow: hidden;
    box-shadow: var(--shadow); border: 1px solid var(--c-line);
    display: flex; flex-direction: column; transition: transform .15s ease, box-shadow .2s ease;
}
.jeu-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); text-decoration: none; }
.jeu-card__thumb { aspect-ratio: 16 / 10; background: var(--grad-game); display: grid; place-items: center; color: #fff; font-size: 2.6rem; }
.jeu-card__thumb img { width: 100%; height: 100%; object-fit: cover; }
.jeu-card__body { padding: 1rem 1.1rem 1.2rem; display: flex; flex-direction: column; gap: .5rem; flex: 1; }
.jeu-card__title { font-size: 1.08rem; font-weight: 700; color: var(--c-ink); margin: 0; }
.jeu-card__desc { color: var(--c-muted); font-size: .9rem; margin: 0; flex: 1; }
.jeu-card__tags { display: flex; flex-wrap: wrap; gap: .35rem; }

.tag { font-size: .72rem; font-weight: 600; padding: .22rem .6rem; border-radius: 999px; background: #ecfdf5; color: var(--c-emerald-dk); }
.tag--niveau { background: #eef2ff; color: var(--c-violet); }

/* ----------------------------- Auth ------------------------------------- */
.auth-page { display: grid; place-items: center; min-height: 100vh; background: var(--grad-terra); padding: 1.5rem; }
.auth-wrap { width: min(440px, 100%); }
.auth-card { background: #fff; border-radius: var(--radius-lg); padding: 2.2rem; box-shadow: var(--shadow-lg); }
.auth-card h1 { font-size: 1.45rem; margin: 0 0 .4rem; }
.auth-card .subtitle { color: var(--c-muted); margin: 0 0 1.4rem; }
.auth-foot { text-align: center; margin-top: 1.2rem; }
.auth-foot a { color: #fff; font-weight: 600; }
.auth-switch { text-align: center; margin-top: 1.2rem; font-size: .92rem; color: var(--c-muted); }

/* ----------------------------- Formulaires ------------------------------ */
.field { margin-bottom: 1.05rem; }
.field label { display: block; font-weight: 600; margin-bottom: .35rem; font-size: .92rem; }
.field .hint { color: var(--c-muted); font-size: .82rem; margin-top: .25rem; }
.input, .textarea, .select {
    width: 100%; padding: .7rem .9rem; border: 1.5px solid var(--c-line);
    border-radius: 10px; font: inherit; background: #fff; color: var(--c-ink);
}
.input:focus, .textarea:focus, .select:focus {
    outline: none; border-color: var(--c-emerald-lt); box-shadow: 0 0 0 3px rgba(20,184,166,.18);
}
.textarea { min-height: 120px; resize: vertical; }
.code-input { letter-spacing: .3em; text-transform: uppercase; font-weight: 700; text-align: center; font-size: 1.3rem; }

.checklist { display: flex; flex-wrap: wrap; gap: .5rem; }
.checklist label {
    display: inline-flex; align-items: center; gap: .4rem; padding: .4rem .75rem;
    border: 1.5px solid var(--c-line); border-radius: 999px; cursor: pointer; font-weight: 500; font-size: .88rem;
}
.checklist input { accent-color: var(--c-emerald); }

/* ----------------------------- Flash ------------------------------------ */
.flash { display: flex; align-items: center; gap: .6rem; padding: .8rem 1rem; border-radius: 12px; margin-bottom: 1rem; font-weight: 500; }
.flash--success { background: #dcfce7; color: #14532d; }
.flash--error { background: #fee2e2; color: #7f1d1d; }
.flash__icon { font-weight: 800; }

/* ----------------------------- App shell -------------------------------- */
.app-shell { display: grid; grid-template-columns: 256px 1fr; min-height: 100vh; }
.sidebar { background: #0b3d39; color: #d1fae5; padding: 1.4rem 1rem; display: flex; flex-direction: column; gap: 1.4rem; }
.sidebar .brand { color: #fff; }
.sidebar__nav { display: flex; flex-direction: column; gap: .25rem; }
.navlink { display: flex; align-items: center; gap: .6rem; padding: .65rem .8rem; border-radius: 10px; color: #b6e9df; font-weight: 600; }
.navlink:hover { background: rgba(255,255,255,.08); text-decoration: none; color: #fff; }
.navlink.is-active { background: var(--c-emerald-lt); color: #04231f; }
.navlink__group { margin-top: 1rem; padding: 0 .8rem; font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; opacity: .6; }

.app-main { display: flex; flex-direction: column; min-width: 0; }
.appbar { display: flex; align-items: center; gap: 1rem; padding: .9rem 1.6rem; background: #fff; border-bottom: 1px solid var(--c-line); position: sticky; top: 0; z-index: 30; }
.appbar__title { font-weight: 700; font-size: 1.05rem; flex: 1; }
.appbar__user { display: flex; align-items: center; gap: .7rem; }
.appbar__name { font-weight: 600; font-size: .9rem; }
.appbar__menu { display: none; background: none; border: 0; font-size: 1.4rem; cursor: pointer; }
.content { padding: 1.8rem 1.6rem 3rem; }

.badge { font-size: .72rem; font-weight: 700; padding: .25rem .6rem; border-radius: 999px; text-transform: uppercase; letter-spacing: .03em; }
.badge--admin { background: #fef3c7; color: #92400e; }
.badge--enseignant { background: #ddd6fe; color: #5b21b6; }
.badge--eleve { background: #bbf7d0; color: #166534; }

/* ----------------------------- Cartes / stats --------------------------- */
.page-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; margin-bottom: 1.4rem; }
.page-head h1 { font-size: 1.6rem; margin: 0; }

.card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 1.3rem; box-shadow: var(--shadow); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 1rem; margin-bottom: 1.6rem; }
.stat { background: #fff; border-radius: var(--radius); padding: 1.2rem 1.3rem; border: 1px solid var(--c-line); box-shadow: var(--shadow); }
.stat__num { font-size: 2rem; font-weight: 800; color: var(--c-emerald); }
.stat__label { color: var(--c-muted); font-size: .9rem; }

/* ----------------------------- Tables ----------------------------------- */
.table-wrap { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: auto; box-shadow: var(--shadow); }
table.tm { width: 100%; border-collapse: collapse; }
table.tm th, table.tm td { padding: .85rem 1rem; text-align: left; border-bottom: 1px solid var(--c-line); }
table.tm th { background: #f9fafb; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--c-muted); }
table.tm tr:last-child td { border-bottom: 0; }
.pill { font-size: .76rem; font-weight: 700; padding: .2rem .6rem; border-radius: 999px; }
.pill--on { background: #dcfce7; color: #166534; }
.pill--off { background: #fee2e2; color: #991b1b; }

.code-chip {
    display: inline-block; font-family: ui-monospace, "Cascadia Code", monospace;
    background: #04231f; color: #5eead4; padding: .35rem .8rem; border-radius: 10px;
    font-weight: 700; letter-spacing: .15em; font-size: 1.1rem;
}

/* ----------------------------- Médias (form jeu) ------------------------ */
.media-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: .9rem; margin-top: 1rem; }
.media-item { position: relative; border-radius: 12px; overflow: hidden; border: 1px solid var(--c-line); background: #f3f4f6; }
.media-item img { aspect-ratio: 16/10; object-fit: cover; width: 100%; }
.media-item__del { position: absolute; top: 6px; right: 6px; background: rgba(0,0,0,.6); color: #fff; border: 0; border-radius: 8px; width: 30px; height: 30px; cursor: pointer; font-size: 1rem; }
.media-item.is-dragging { opacity: .5; }
.dropzone { border: 2px dashed var(--c-emerald-lt); border-radius: 12px; padding: 1.4rem; text-align: center; color: var(--c-muted); cursor: pointer; transition: background .2s; }
.dropzone.is-over { background: #ecfdf5; }

.empty { text-align: center; color: var(--c-muted); padding: 2.5rem 1rem; }
.empty__emoji { font-size: 2.4rem; }

.toolbar { display: flex; gap: .8rem; flex-wrap: wrap; margin-bottom: 1.2rem; align-items: center; }
.toolbar input[type="search"], .toolbar select { max-width: 280px; }
.muted { color: var(--c-muted); }
.mt { margin-top: 1.2rem; }
.row-actions { display: flex; gap: .5rem; flex-wrap: wrap; }

/* ----------------------------- Responsive ------------------------------- */
@media (max-width: 860px) {
    .app-shell { grid-template-columns: 1fr; }
    .sidebar { position: fixed; inset: 0 auto 0 0; width: 256px; transform: translateX(-100%); transition: transform .2s ease; z-index: 60; }
    .sidebar.is-open { transform: translateX(0); }
    .appbar__menu { display: block; }
    .appbar__name { display: none; }
}