/**
 * css/descripcio-grafica.css
 * Estils per a l'activitat "Descripció d'una gràfica".
 * Paleta i tipografia coherents amb asimptotes.css.
 */

@import url('https://fonts.googleapis.com/css2?family=Barlow:wght@400;500;600;700;800&display=swap');

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

:root {
    --bg-color:      #f0f6ff;
    --primary:       #2563eb;
    --primary-light: #dbeafe;
    --primary-dark:  #1d4ed8;
    --primary-hover: #1e40af;
    --text-main:     #1e293b;
    --text-muted:    #64748b;
    --border-light:  #e2e8f0;
    --border-heavy:  #cbd5e1;
    --success:       #10b981;
    --danger:        #ef4444;
    --danger-light:  #fee2e2;
}

/* ---- BASE ---- */
html { height: 100%; }
body {
    height: 100%;
    min-height: 100vh; min-height: 100dvh;
    display: flex; flex-direction: column;
    font-family: 'Barlow', sans-serif;
    background: var(--bg-color);
    color: var(--text-main);
    overflow: hidden;
}

/* ---- CAPÇALERA ---- */
.title-row {
    display: flex; align-items: center; justify-content: center;
    padding: 10px 0 6px;
}
.title-row h1 {
    font-size: clamp(.95rem, 1.8vw, 1.2rem);
    font-weight: 700; color: var(--primary-dark);
}
.home-icon-link {
    display: block; width: 58px; height: 58px;
    flex-shrink: 0; opacity: .75; transition: opacity .2s ease;
}
.home-icon-link:hover { opacity: 1; }
.home-icon-link img { width: 100%; height: 100%; object-fit: contain; }

/* ---- PANELL ---- */
.panel {
    max-width: 98vw; width: 98vw; margin: 0 auto;
    background: #fff; border-radius: 14px;
    box-shadow: 0 2px 16px rgba(0,0,0,.08);
    display: flex; flex-direction: column;
    flex: 1 1 0; min-height: 0; overflow: hidden;
}

/* ---- SELECTOR DE NIVELL ---- */
.level-selector {
    display: flex; gap: 3px;
    background: #e2e8f0; padding: 3px; border-radius: 9px;
}
.lvl-btn {
    border: none; padding: 5px 13px; border-radius: 7px;
    cursor: pointer; font-family: 'Barlow', sans-serif;
    font-size: .85rem; font-weight: 700;
    color: var(--text-muted); background: transparent;
    transition: background .2s, color .2s, box-shadow .2s;
}
.lvl-btn:hover { background: rgba(255,255,255,.75); color: var(--text-main); }
.lvl-btn.active {
    background: white; color: var(--text-main);
    box-shadow: 0 1px 4px rgba(0,0,0,.12);
}

/* ---- HEADER INFO ---- */
.header-info {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 16px;
    border-bottom: 1px solid var(--border-light);
    flex-shrink: 0;
}
.header-left     { display: flex; align-items: center; gap: 6px; }
.header-right    { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.session-text    { font-size: .98rem; font-weight: 700; color: var(--text-muted); }
.level-text      { font-size: .9rem;  font-weight: 600; color: var(--text-muted); }
.session-sep     { color: var(--border-heavy); font-size: 1rem; }

/* ---- BOTÓ GRÀFIQUES ACOLORIDES ---- */
.colored-toggle {
    display: flex; align-items: center; gap: 5px;
    border: 2px solid var(--border-heavy); padding: 5px 11px; border-radius: 8px;
    cursor: pointer; font-family: 'Barlow', sans-serif;
    font-size: .82rem; font-weight: 700;
    color: var(--text-muted); background: transparent;
    transition: all .2s;
}
.colored-toggle:hover { border-color: var(--primary); color: var(--text-main); }
.colored-toggle.active {
    background: var(--primary-light); border-color: var(--primary);
    color: var(--text-main);
}

/* ---- LLEGENDA ACOLORIDA (HTML, sota el gràfic) ---- */
#graph-legend {
    display: flex; flex-wrap: wrap; gap: 8px;
    padding: 6px 2px 2px; flex-shrink: 0;
}
.legend-pill {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 5px 12px; border-radius: 20px;
    font-size: .84rem; font-weight: 700; font-family: 'Barlow', sans-serif;
    color: white; background: var(--pill-color, #64748b);
    box-shadow: 0 1px 4px rgba(0,0,0,.15);
}
.legend-pill::before {
    content: ''; display: inline-block;
    width: 22px; height: 3px; border-radius: 2px;
    background: rgba(255,255,255,.6);
}

/* ---- FOOTER DE GRÀFIC ---- */
#graph-footer {
    display: flex; align-items: center; gap: 10px;
    padding: 6px 2px 2px; flex-shrink: 0;
}
#countdown-wrap {
    flex: 1; height: 5px; background: var(--border-light);
    border-radius: 3px; overflow: hidden;
}
@keyframes drainBar {
    from { width: 100%; }
    to   { width: 0%;   }
}
#countdown-bar {
    height: 100%; width: 100%;
    background: var(--primary); border-radius: 3px;
    transition: background .15s;
}
#countdown-bar.paused { background: var(--text-muted); }
#btn-skip {
    flex-shrink: 0; padding: 4px 12px;
    font-family: 'Barlow', sans-serif; font-size: .82rem; font-weight: 700;
    border: none; background: var(--primary); color: white;
    border-radius: 7px; cursor: pointer; transition: background .15s;
    white-space: nowrap;
}
#btn-skip:hover { background: var(--primary-hover); }

/* ---- GAME SCREEN ---- */
#game-screen {
    display: flex; flex-direction: column; flex: 1 1 0; min-height: 0;
}

/* ---- LAYOUT DUES COLUMNES ---- */
.game-body { display: flex; flex: 1 1 0; min-height: 0; }

.game-left {
    width: 42%;
    display: flex; flex-direction: column;
    padding: 14px 12px 14px 16px;
    border-right: 1px solid var(--border-light);
    overflow-y: auto; gap: 0;
}
.game-right {
    width: 58%;
    display: flex; flex-direction: column;
    padding: 10px 14px; overflow: hidden; min-height: 0;
}

/* ---- BADGE DE TIPUS DE PREGUNTA ---- */
.question-badge {
    display: inline-block;
    font-size: .76rem; font-weight: 700; letter-spacing: .5px;
    text-transform: uppercase; color: var(--text-main);
    background: var(--primary-light);
    padding: 4px 12px; border-radius: 20px;
    margin-bottom: 8px; align-self: flex-start;
}

/* ---- FUNCTION BOX ---- */
.function-box {
    display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px;
}
.function-label {
    font-size: 1.05rem; font-weight: 700;
    color: var(--text-main); line-height: 1.3;
}
.function-math {
    font-size: 1em; color: #111;
    padding: 10px 14px; background: #f0f6ff;
    border-radius: 10px; border: 2px solid var(--border-light);
    overflow-x: auto;
}

/* ---- OPCIONS (llista 1 columna — textos llargs) ---- */
.options-list {
    display: flex; flex-direction: column; gap: 8px; width: 100%;
}

@keyframes popIn {
    0%   { opacity: 0; transform: scale(.97) translateY(4px); }
    100% { opacity: 1; transform: scale(1)   translateY(0);   }
}
@keyframes shake {
    0%,100% { transform: translateX(0);  }
    25%     { transform: translateX(-5px); }
    75%     { transform: translateX(5px);  }
}

.btn-option {
    padding: 11px 14px;
    font-size: .93em; font-family: 'Barlow', sans-serif; font-weight: 500;
    border-radius: 10px; border: 2px solid var(--border-heavy);
    background: white; color: var(--text-main); cursor: pointer;
    transition: background .15s, border-color .15s;
    text-align: left; line-height: 1.4;
    box-shadow: 0 1px 3px rgba(0,0,0,.04);
    opacity: 0;
    animation: popIn .25s cubic-bezier(.175,.885,.32,1.275) forwards;
}
@media (hover: hover) {
    .btn-option:hover:not([disabled]) {
        background: var(--primary-light); border-color: var(--primary);
    }
}
.btn-option:active { transform: scale(.98); }
.btn-option:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

.btn-option.correct {
    background: var(--success) !important; border-color: var(--success) !important;
    color: white !important; pointer-events: none;
}
.btn-option.wrong {
    background: var(--danger-light) !important; border-color: var(--danger) !important;
    color: var(--danger) !important; opacity: 1 !important;
    pointer-events: none; animation: shake .3s;
}

/* ---- FEEDBACK ---- */
#missatge-feedback {
    font-size: .87rem; min-height: 26px;
    transition: opacity .2s; margin-top: 8px;
    color: var(--text-muted);
}
.feedback-correct { color: var(--success); font-weight: 700; }

/* ---- GRÀFIC SVG ---- */
#graph-canvas {
    width: 100%; flex: 1 1 0; min-height: 0;
    display: flex; align-items: center; justify-content: center;
}
#graph-canvas svg {
    display: block; width: 100% !important;
    height: 100% !important; max-height: 100%; border-radius: 6px;
}

/* ---- RESUM FINAL ---- */
#session-summary {
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    flex: 1; padding: 40px 20px; text-align: center;
}
.end-emoji { font-size: 3em; margin-bottom: 12px; }
.end-title {
    font-size: 1.6em; font-weight: 800;
    color: var(--primary-dark); margin-bottom: 6px;
}
.end-sub   { font-size: 1rem; color: var(--text-muted); margin-bottom: 28px; }
.summary-continue-btn {
    display: inline-block; padding: 12px 36px;
    background: var(--primary); color: white;
    border: none; border-radius: 10px;
    font-family: 'Barlow', sans-serif; font-size: 1em; font-weight: 700;
    cursor: pointer; transition: background .2s, transform .15s;
}
.summary-continue-btn:hover  { background: var(--primary-hover); transform: translateY(-1px); }
.summary-continue-btn:active { transform: scale(.97); }

/* ---- RESPONSIVE ---- */
@media (max-width: 780px) {
    body { overflow: auto; }
    .game-body  { flex-direction: column; }
    .game-left  { width: 100%; border-right: none; border-bottom: 1px solid var(--border-light); }
    .game-right { width: 100%; min-height: 260px; }
}