:root {
    --navy: #111a44;
    --bg: #f5f7fb;
    --surface: #ffffff;
    --surface-strong: #ffffff;
    --text: #162039;
    --muted: #65708a;
    --line: #dfe5f0;
    --accent: #2ca6a4;
    --accent-dark: #218c8a;
    --accent-soft: #eef9f8;
    --success: #087f5b;
    --success-soft: #edf9f4;
    --danger: #b42318;
    --danger-soft: #fdeceb;
    --shadow: 0 18px 55px rgba(42, 55, 98, 0.11);
    --radius: 22px;
}

* { box-sizing: border-box; }

html { color-scheme: light; }

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle at 8% 5%, rgba(19, 184, 178, 0.14), transparent 26rem),
        radial-gradient(circle at 95% 0%, rgba(101, 49, 201, 0.12), transparent 28rem),
        var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.55;
}

button, input { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .62; }

.visually-hidden {
    position: absolute;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* En-tete/pied de page/texte de lien : desormais herites du style.css partage
   (jeux/assets/css/style.css, charge avant celui-ci) pour rester coherent avec
   le hub et les pages de jeux a enigme - voir inc/page-jeu-enigme.php. */

.page-shell {
    padding-bottom: 64px;
}

.screen.is-hidden { display: none; }

.eyebrow {
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: 13px;
    font-weight: 700;
    color: var(--accent-dark);
    margin: 0 0 6px;
}

h1 { margin: 0 0 14px; font-size: clamp(26px, 4vw, 34px); }

.intro-text { color: var(--muted); margin: 0 0 28px; }

.text-button {
    background: none;
    border: none;
    color: var(--accent-dark);
    font-weight: 700;
    padding: 10px 0;
    text-decoration: underline;
}

.primary-button {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 12px;
    padding: 12px 20px;
    font-weight: 700;
}

.primary-button:hover { background: var(--accent-dark); }

/* .site-footer : idem, style herite du CSS partage. */

/* --- Choix de mode / difficulté --- */

.mode-choix,
.difficulte-choix {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
    margin-bottom: 28px;
}

.mode-card,
.difficulte-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
    text-align: left;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
}

.mode-card:hover,
.difficulte-card:hover {
    border-color: var(--accent);
}

.difficulte-card.is-active {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.mode-card-titre {
    font-weight: 800;
    font-size: 18px;
    color: var(--accent-dark);
}

.mode-card-desc {
    color: var(--muted);
    font-size: 14px;
}

.symbole-choix {
    margin-bottom: 24px;
}

.saisie-titre {
    font-weight: 700;
    margin: 0 0 10px;
}

.symbole-boutons {
    display: flex;
    gap: 10px;
}

.symbole-bouton {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 10px 18px;
    font-weight: 700;
    color: var(--text);
}

.symbole-bouton.is-active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* --- Plateau de jeu --- */

.scoreboard {
    display: flex;
    gap: 14px;
    margin-bottom: 18px;
}

.score-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 10px 18px;
    min-width: 64px;
}

.score-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--muted);
    font-weight: 700;
}

.score-valeur {
    font-size: 20px;
    font-weight: 800;
    color: var(--accent-dark);
}

.statut-jeu {
    font-weight: 700;
    margin: 0 0 18px;
    font-size: 17px;
}

.statut-jeu.statut-victoire { color: var(--success); }
.statut-jeu.statut-nul { color: var(--muted); }

.plateau-ttt {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    width: min(100%, 360px);
    margin: 0 auto 24px;
}

.cellule-ttt {
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow);
    font-size: clamp(32px, 8vw, 48px);
    font-weight: 800;
    color: var(--accent-dark);
}

.cellule-ttt:not(:disabled):hover {
    border-color: var(--accent);
}

.cellule-ttt.cellule-gagnante {
    background: var(--success-soft);
    border-color: var(--success);
    color: var(--success);
}

.jeu-actions {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}