/*
============================================================================
PROJECTE: Motor Educatiu Step Quiz (Vanilla JS)
FITXER: css/llenguatge-algebraic.css
ROL: Estils específics de l'activitat de llenguatge algebraic.
ESTÈTICA: Paleta violeta — àlgebra, abstracció, raonament.
DEPENDÈNCIES: Requereix css/shared.css carregat ABANS.
============================================================================
*/

/* ---- Variables de color específiques ---- */
:root {
    --bg-color:      #f5f3ff;
    --primary:       #7c3aed;
    --primary-light: #ede9fe;
    --primary-hover: #6d28d9;
    --primary-dark:  #4c1d95;
    --accent:        #f59e0b;
}

/* ---- Overrides de color específics ---- */
h1 { color: var(--primary-dark); }
.header-info { background-color: #f5f3ff; }
.level-text  { color: var(--primary-dark); }
.score-text  { color: var(--primary); }

/* ---- ZONA DE PREGUNTA ---- */
.question-box {
    padding: 30px 25px 20px;
    text-align: center;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.question-context {
    font-size: 1em;
    color: var(--text-muted);
    margin-bottom: 4px;
    font-style: italic;
}

.question-text {
    font-size: 1.35em;
    font-weight: bold;
    color: var(--text-main);
    line-height: 1.5;
    max-width: 600px;
    animation: fadeIn 0.3s;
}

.question-text .var-highlight {
    color: var(--primary);
    font-family: 'Courier New', Courier, monospace;
    font-weight: 900;
    font-size: 1.1em;
}

/* ---- ZONA D'OPCIONS ---- */
.options-panel {
    padding: 10px 20px 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 100%;
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    width: 100%;
    max-width: 500px;
    animation: fadeIn 0.3s;
}

.btn-option {
    background: white;
    border: 2.5px solid #d8d0f0;
    border-radius: 12px;
    padding: 18px 14px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.35em;
    font-weight: bold;
    color: var(--primary-dark);
    cursor: pointer;
    transition: all 0.2s ease;
    touch-action: manipulation;
    text-align: center;
    line-height: 1.3;
    word-break: break-word;
}

.btn-option:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

@media (hover: hover) {
    .btn-option:hover {
        background-color: var(--primary-light);
        border-color: var(--primary);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(124, 58, 237, 0.2);
    }
}

.btn-option:active {
    transform: scale(0.97);
}

.btn-option.correct {
    background-color: #d1fae5;
    border-color: #10b981;
    color: #065f46;
    animation: correctPop 0.4s ease;
}

.btn-option.incorrect {
    background-color: #fee2e2;
    border-color: #ef4444;
    color: #991b1b;
    animation: shake 0.3s;
}

.btn-option.disabled {
    pointer-events: none;
    opacity: 0.5;
}

.btn-option.reveal-correct {
    background-color: #d1fae5;
    border-color: #10b981;
    color: #065f46;
    opacity: 1 !important;
    pointer-events: none;
}

/* ---- Per a expressions llargues, layout vertical ---- */
.options-grid.vertical {
    grid-template-columns: 1fr;
    max-width: 340px;
}

/* ---- RESPONSIU ---- */
@media (max-width: 480px) {
    .question-text  { font-size: 1.15em; }
    .question-box   { padding: 20px 15px 15px; }
    .options-panel  { padding: 8px 15px 25px; }
    .options-grid   { gap: 10px; }
    .btn-option     { font-size: 1.15em; padding: 15px 10px; }
}

@media (max-width: 350px) {
    .question-text  { font-size: 1.05em; }
    .btn-option     { font-size: 1em; padding: 12px 8px; }
    .options-grid   { gap: 8px; }
}

/* ---- ANIMACIONS ESPECÍFIQUES ---- */
@keyframes correctPop {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.attempts-counter.blink-warning { animation: blinkAttempts 1s ease-in-out; }
@keyframes blinkAttempts {
    0%   { background-color: #facc15; }
    25%  { background-color: white; }
    50%  { background-color: #facc15; }
    75%  { background-color: white; }
    100% { background-color: #facc15; }
}