/* ============================================================
   kahoot.css — Design system "Kahoot-like" pour NeuroPlay
   Couleurs, typographie, boutons, formes de réponses, podium…
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,400;0,600;0,700;0,800;0,900;1,700&display=swap');

:root {
    /* Palette de marque */
    --k-purple:        #46178f;
    --k-purple-dark:   #2d0a63;
    --k-purple-light:  #6630c9;
    --k-bg-blue:       #1368ce;

    /* Couleurs des 4 réponses */
    --k-red:     #e21b3c;
    --k-red-d:   #b1102a;
    --k-blue:    #1368ce;
    --k-blue-d:  #0e51a3;
    --k-yellow:  #d89e00;
    --k-yellow-d:#a87a00;
    --k-green:   #26890c;
    --k-green-d: #1b6308;

    /* Neutres */
    --k-ink:     #333344;
    --k-muted:   #6e6e80;
    --k-line:    #e6e6ee;
    --k-card:    #ffffff;

    /* États */
    --k-correct: #66bf39;
    --k-wrong:   #e21b3c;

    --k-radius:  8px;
    --k-shadow:  0 4px 0 rgba(0,0,0,0.18);
    --k-shadow-soft: 0 10px 25px rgba(0,0,0,0.18);

    --k-font: 'Montserrat', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--k-font);
    color: var(--k-ink);
    -webkit-font-smoothing: antialiased;
}

/* ---------- Fonds ---------- */
.k-bg {
    min-height: 100vh;
    background:
        radial-gradient(circle at 20% 18%, rgba(255,255,255,0.10) 0, transparent 38%),
        radial-gradient(circle at 82% 78%, rgba(255,255,255,0.08) 0, transparent 40%),
        linear-gradient(160deg, #5a1fb0 0%, var(--k-purple) 45%, var(--k-purple-dark) 100%);
}
.k-bg-blue {
    min-height: 100vh;
    background:
        radial-gradient(circle at 78% 14%, rgba(255,255,255,0.30) 0, transparent 30%),
        linear-gradient(180deg, #d9ecff 0%, #acd3ff 45%, #7cb8f5 100%);
}

/* Bulles décoratives (optionnel, via .k-bubbles container) */
.k-bubbles { position: fixed; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; }
.k-bubbles span {
    position: absolute; border-radius: 50%;
    background: radial-gradient(circle at 35% 30%, rgba(255,255,255,0.55), rgba(255,255,255,0.05) 70%);
}

/* ---------- Barre de titre ---------- */
.k-topbar {
    position: relative; z-index: 5;
    display: flex; align-items: center; justify-content: space-between;
    gap: 14px; flex-wrap: wrap;
    padding: 14px 22px;
    background: rgba(255,255,255,0.96);
    box-shadow: 0 2px 14px rgba(0,0,0,0.12);
}
.k-bg .k-topbar, .k-bg-blue .k-topbar { background: rgba(255,255,255,0.92); }
.k-brand {
    display: flex; align-items: center; gap: 10px;
    font-weight: 900; font-size: 1.35rem; color: var(--k-purple);
    letter-spacing: -0.5px;
}
.k-brand .k-logo {
    display: inline-grid; place-items: center;
    width: 38px; height: 38px; border-radius: 9px;
    background: var(--k-purple); color: #fff; font-size: 1.1rem;
    box-shadow: var(--k-shadow);
}

/* ---------- Boutons "chunky" 3D ---------- */
.k-btn {
    --c: var(--k-purple); --cd: var(--k-purple-dark);
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    font-family: var(--k-font); font-weight: 800; font-size: 1rem;
    color: #fff; background: var(--c);
    border: none; border-radius: var(--k-radius);
    padding: 13px 22px; cursor: pointer;
    box-shadow: 0 4px 0 var(--cd);
    transition: transform .05s ease, filter .15s ease;
    text-decoration: none; line-height: 1.1;
}
.k-btn:hover   { filter: brightness(1.05); }
.k-btn:active  { transform: translateY(3px); box-shadow: 0 1px 0 var(--cd); }
.k-btn:disabled{ opacity: .55; cursor: not-allowed; box-shadow: 0 4px 0 var(--cd); }

.k-btn--red    { --c: var(--k-red);    --cd: var(--k-red-d); }
.k-btn--green  { --c: var(--k-green);  --cd: var(--k-green-d); }
.k-btn--blue   { --c: var(--k-blue);   --cd: var(--k-blue-d); }
.k-btn--yellow { --c: var(--k-yellow); --cd: var(--k-yellow-d); }
.k-btn--dark   { --c: #2f2f3a;         --cd: #16161d; }
.k-btn--light  { --c: #ffffff; --cd: #cfcfda; color: var(--k-purple); }
.k-btn--block  { width: 100%; }
.k-btn--lg     { font-size: 1.15rem; padding: 16px 26px; }

/* ---------- Cartes ---------- */
.k-card {
    background: var(--k-card);
    border-radius: 14px;
    box-shadow: var(--k-shadow-soft);
    padding: 26px;
}
.k-center-wrap {
    position: relative; z-index: 2;
    min-height: calc(100vh - 0px);
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    padding: 28px 16px; gap: 18px;
}

/* ---------- Boîte PIN / rejoindre ---------- */
.k-pin-card { width: 100%; max-width: 420px; text-align: center; }
.k-pin-label { font-weight: 700; color: var(--k-muted); font-size: .8rem; letter-spacing: 2px; text-transform: uppercase; }
.k-pin {
    font-weight: 900; font-size: 2.6rem; letter-spacing: 4px; color: var(--k-ink);
    background: #f3f3f8; border-radius: 10px; padding: 6px 4px; margin: 6px 0 4px;
}
.k-input {
    width: 100%; font-family: var(--k-font); font-weight: 700; font-size: 1.1rem;
    text-align: center; color: var(--k-ink);
    padding: 16px 14px; margin: 8px 0;
    border: 3px solid var(--k-line); border-radius: 10px; outline: none;
    transition: border-color .15s ease;
}
.k-input::placeholder { color: #b6b6c4; font-weight: 600; }
.k-input:focus { border-color: var(--k-purple-light); }

/* QR "Join" panel (coin) */
.k-join-panel {
    background: var(--k-purple-dark); color: #fff;
    border-radius: 12px; padding: 14px; text-align: center; width: 188px;
    box-shadow: var(--k-shadow-soft);
}
.k-join-panel h4 { margin: 0 0 8px; font-size: 1rem; font-weight: 800; }
.k-join-panel img { display: block; width: 150px; height: 150px; margin: 0 auto; border-radius: 8px; background:#fff; padding:6px; }
.k-join-panel .pin-sub { margin-top: 10px; font-size: .72rem; opacity: .8; text-transform: uppercase; letter-spacing: 1px; }
.k-join-panel .pin-big { font-size: 1.7rem; font-weight: 900; letter-spacing: 3px; }

/* ---------- Question (grand écran prof) ---------- */
.k-question-title {
    text-align: center; font-weight: 800; color: var(--k-ink);
    font-size: clamp(1.4rem, 3vw, 2.4rem); line-height: 1.25;
    background: #fff; border-radius: 14px; padding: 22px 26px;
    box-shadow: var(--k-shadow-soft); margin: 0;
}
.k-question-media { display: block; max-width: 320px; max-height: 260px; margin: 18px auto; border-radius: 12px; box-shadow: var(--k-shadow-soft); }

/* Cercle timer + compteur réponses */
.k-timer {
    width: 78px; height: 78px; border-radius: 50%;
    background: var(--k-purple); color: #fff;
    display: grid; place-items: center;
    font-size: 2.1rem; font-weight: 900;
    box-shadow: var(--k-shadow-soft);
}
.k-answers-count { text-align: center; }
.k-answers-count b { display: block; font-size: 2.1rem; font-weight: 900; color: var(--k-ink); line-height: 1; }
.k-answers-count span { font-size: .85rem; font-weight: 700; color: var(--k-muted); text-transform: uppercase; letter-spacing: 1px; }

/* ---------- Formes des réponses ---------- */
.k-shape { font-size: 1.15em; line-height: 1; display: inline-block; }

/* ---------- Grille de réponses (élève : 4 tuiles) ---------- */
.k-answers {
    display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
    width: 100%; max-width: 820px; margin: 0 auto;
}
.k-answer {
    --c: var(--k-red); --cd: var(--k-red-d);
    display: flex; align-items: center; gap: 14px;
    min-height: 84px; padding: 16px 20px;
    background: var(--c); color: #fff;
    border: none; border-radius: 10px; cursor: pointer;
    font-family: var(--k-font); font-weight: 800; font-size: 1.15rem; text-align: left;
    box-shadow: 0 5px 0 var(--cd);
    transition: transform .06s ease, filter .15s ease, opacity .2s ease;
}
.k-answer .k-shape { font-size: 1.7rem; flex: 0 0 auto; }
.k-answer:hover  { filter: brightness(1.06); }
.k-answer:active { transform: translateY(3px); box-shadow: 0 2px 0 var(--cd); }
.k-answer.selected { outline: 5px solid #fff; outline-offset: -5px; filter: brightness(1.08); }
.k-answer.disabled { pointer-events: none; opacity: .45; }
.k-answer.dim      { opacity: .35; }

.k-answer--red    { --c: var(--k-red);    --cd: var(--k-red-d); }
.k-answer--blue   { --c: var(--k-blue);   --cd: var(--k-blue-d); }
.k-answer--yellow { --c: var(--k-yellow); --cd: var(--k-yellow-d); }
.k-answer--green  { --c: var(--k-green);  --cd: var(--k-green-d); }

/* ---------- Barres de réponses (grand écran prof) avec compteur ---------- */
.k-answer-bars { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; width: 100%; max-width: 900px; margin: 18px auto 0; }
.k-answer-bar {
    --c: var(--k-red); --cd: var(--k-red-d);
    display: flex; align-items: center; gap: 14px;
    padding: 16px 20px; color: #fff; background: var(--c);
    border-radius: 10px; font-weight: 800; font-size: 1.2rem;
    box-shadow: 0 5px 0 var(--cd);
}
.k-answer-bar .k-shape { font-size: 1.6rem; }
.k-answer-bar .lbl { flex: 1; }
.k-answer-bar .cnt {
    background: rgba(0,0,0,0.22); border-radius: 30px;
    padding: 4px 14px; font-size: 1rem; min-width: 42px; text-align: center;
}
.k-answer-bar--red    { --c: var(--k-red);    --cd: var(--k-red-d); }
.k-answer-bar--blue   { --c: var(--k-blue);   --cd: var(--k-blue-d); }
.k-answer-bar--yellow { --c: var(--k-yellow); --cd: var(--k-yellow-d); }
.k-answer-bar--green  { --c: var(--k-green);  --cd: var(--k-green-d); }

/* ---------- Liste de participants (panneau latéral) ---------- */
.k-players-panel {
    background: rgba(255,255,255,0.14); border: 1px solid rgba(255,255,255,0.25);
    border-radius: 14px; padding: 16px; color: #fff;
    backdrop-filter: blur(4px);
}
.k-players-panel h3 { margin: 0 0 12px; font-size: 1.05rem; font-weight: 800; }
.k-player-chip {
    background: #fff; color: var(--k-ink); font-weight: 800;
    border-radius: 8px; padding: 9px 13px; margin-bottom: 8px;
    display: flex; align-items: center; gap: 8px;
    animation: k-pop .3s ease;
}
@keyframes k-pop { from { opacity: 0; transform: translateY(-8px) scale(.96); } to { opacity: 1; transform: none; } }

/* ---------- Overlay bonne/mauvaise réponse ---------- */
.k-overlay {
    display: none; position: fixed; inset: 0; z-index: 9999;
    flex-direction: column; align-items: center; justify-content: center;
    color: #fff; text-align: center; gap: 10px;
    background: var(--k-correct);
}
.k-overlay.show { display: flex; animation: k-overlay-in .25s ease; }
.k-overlay.wrong { background: var(--k-wrong); }
.k-overlay .big-shape { font-size: 5rem; }
.k-overlay .msg { font-size: 2rem; font-weight: 900; }
@keyframes k-overlay-in { from { opacity: 0; transform: scale(.9); } to { opacity: 1; transform: none; } }

/* ---------- Podium ---------- */
.k-podium { display: flex; justify-content: center; align-items: flex-end; gap: 22px; flex-wrap: wrap; }
.k-podium-col { width: 190px; text-align: center; }
.k-podium-col .who { font-size: 1.25rem; font-weight: 800; color: #fff; margin-bottom: 8px; text-shadow: 0 2px 6px rgba(0,0,0,.35); word-break: break-word; }
.k-podium-col .score { font-size: 1.05rem; font-weight: 700; color: rgba(255,255,255,.9); }
.k-podium-bar {
    margin-top: 12px; border-radius: 14px 14px 0 0;
    background: rgba(255,255,255,0.16); border: 1px solid rgba(255,255,255,.25);
    display: flex; align-items: flex-start; justify-content: center; padding-top: 16px;
}
/* badge pentagone (rang) */
.k-rank-badge {
    width: 56px; height: 56px; margin: -28px auto 8px;
    display: grid; place-items: center;
    font-size: 1.6rem; font-weight: 900; color: #fff;
    clip-path: polygon(50% 0%, 100% 38%, 82% 100%, 18% 100%, 0% 38%);
}
.k-rank-1 { background: #ffd000; color:#5a4500; }
.k-rank-2 { background: #b9c0cc; color:#3a4150; }
.k-rank-3 { background: #d98841; color:#5a3415; }

/* ---------- Leaderboard (lignes) ---------- */
.k-leaderboard { width: 100%; max-width: 560px; margin: 0 auto; }
.k-lb-row {
    display: flex; align-items: center; gap: 12px;
    background: #fff; color: var(--k-ink);
    border-radius: 10px; padding: 12px 16px; margin-bottom: 9px;
    box-shadow: 0 3px 8px rgba(0,0,0,.12); font-weight: 800;
}
.k-lb-row .rk { width: 26px; text-align: center; color: var(--k-purple); }
.k-lb-row .nm { flex: 1; word-break: break-word; }
.k-lb-row .sc { color: var(--k-purple); }
.k-lb-row .sub { color: var(--k-muted); font-weight: 600; font-size: .82rem; }

/* ---------- Utilitaires ---------- */
.k-hidden { display: none !important; }
.k-muted  { color: var(--k-muted); }
.k-title-xl { font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 900; color: #fff; text-shadow: 0 3px 10px rgba(0,0,0,.3); margin: 0; text-align: center; }
.k-error { color: #ffd5db; background: rgba(226,27,60,.85); border-radius: 8px; padding: 10px 14px; font-weight: 700; }

@media (max-width: 640px) {
    .k-answers, .k-answer-bars { grid-template-columns: 1fr; }
    .k-answer { min-height: 70px; font-size: 1.05rem; }
    .k-pin { font-size: 2.1rem; }
    .k-podium-col { width: 46%; }
}