/*
 * EJERCICIOS.CSS — Estilos del sistema de ejercicios
 * =====================================================
 * Usado por: ejercicios/index.php, ejercicios/ejercicio.php
 */

/* ══════════════════════════════════════════
   INDEX — Grid de cards
══════════════════════════════════════════ */

.ej-index-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    margin-top: 8px;
}

.section-head-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: nowrap;
    margin-bottom: 16px;
}

.section-head-actions h2 {
    flex: 1 1 auto;
    margin: 0;
    min-width: 0;
}

.section-head-actions .btn-try-it {
    flex: 0 0 auto;
    margin-left: auto;
}

.ej-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 20px;
    background: #1a2030;
    border: 1px solid #2d3748;
    border-left: 3px solid var(--lc, #4f46e5);
    border-radius: 8px;
    text-decoration: none;
    transition: transform 0.15s, box-shadow 0.2s, border-color 0.2s;
}
.ej-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.35);
    border-color: var(--lc, #4f46e5);
}

.ej-card__top {
    display: flex;
    align-items: center;
    gap: 8px;
}
.ej-card__icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}
.ej-card__lang {
    font-size: 11px;
    font-weight: 700;
    color: var(--lc, #4f46e5);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    flex: 1;
}
.ej-card__nivel {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.ej-card__titulo {
    font-size: 15px;
    font-weight: 700;
    color: #f1f5f9;
    line-height: 1.35;
}
.ej-card__consigna {
    font-size: 13px;
    color: #64748b;
    line-height: 1.65;
    flex: 1;
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    line-clamp: 3;
}
.ej-card__footer {
    font-size: 12px;
    color: #374151;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color 0.2s;
    padding-top: 4px;
    border-top: 1px solid #1e293b;
}
.ej-card:hover .ej-card__footer { color: var(--lc, #4f46e5); }
.ej-card__arrow { transition: transform 0.2s; display: inline-block; }
.ej-card:hover .ej-card__arrow  { transform: translateX(4px); }

/* ══════════════════════════════════════════
   EJERCICIO — Layout principal
══════════════════════════════════════════ */

/* Quitar padding del main para que el editor ocupe todo */
.ej-page .main-content { padding: 0 !important; overflow: hidden; }

.ej-wrap {
    display: grid;
    grid-template-columns: 360px 1fr;
    height: calc(100vh - 126px); /* 58px header + 68px padding-top del body */
    overflow: hidden;
}

/* ── Panel izquierdo — consigna ── */
.ej-left {
    background: #252525;
    border-right: 1px solid #2d2d2d;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.ej-left-body {
    flex: 1;
    overflow-y: auto;
    padding: 28px 24px;
    scrollbar-width: thin;
    scrollbar-color: #3d3d3d transparent;
}
.ej-left-body::-webkit-scrollbar       { width: 4px; }
.ej-left-body::-webkit-scrollbar-thumb { background: #3d3d3d; border-radius: 99px; }

.ej-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.ej-breadcrumb a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: #6b7280;
    text-decoration: none;
    padding: 4px 10px;
    border: 1px solid #3d3d3d;
    border-radius: 5px;
    transition: all 0.2s;
    font-size: 12px;
}
.ej-breadcrumb a:hover { border-color: #555; color: #9ca3af; }

.ej-share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 7px 9px;
    background: transparent;
    border: 1px solid #ffffff;
    border-radius: 5px;
    color: #ffffff;
    font-size: 12px;
    font-family: inherit;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.15s;
}
.ej-share-btn svg {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
}
.ej-share-btn span {
    display: none;
}
.ej-share-btn:hover {
    border-color: #4f46e5;
    color: #a5b4fc;
    background: rgba(79,70,229,0.08);
    transform: translateY(-1px);
}
.ej-share-btn.copied {
    gap: 6px;
    border-color: #10b981;
    color: #34d399;
    background: rgba(16,185,129,0.08);
}
.ej-share-btn.copied span {
    display: inline;
}

.ej-badges { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; align-items: center; }
.ej-badge {
    font-size: 11px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 6px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}
.ej-badge--lang  { color: var(--lc); border: 1px solid var(--lc); background: transparent; }

/* Nivel con color propio */
.ej-badge--nivel              { color: #9ca3af; border: 1px solid #3d3d3d; background: transparent; }
.ej-badge--nivel-basico       { color: #059669; border-color: #059669; background: rgba(5,150,105,0.08); }
.ej-badge--nivel-intermedio   { color: #d97706; border-color: #d97706; background: rgba(217,119,6,0.08); }
.ej-badge--nivel-avanzado     { color: #dc2626; border-color: #dc2626; background: rgba(220,38,38,0.08); }

.ej-titulo {
    font-size: 20px;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.35;
    margin-bottom: 12px;
}
.ej-intro {
    font-size: 14px;
    color: #B6BABE;
    line-height: 1.85;
    margin-bottom: 16px;
}
.ej-huecos-count {
    font-size: 12px;
    color: #6b7280;
    margin-bottom: 20px;
}
.ej-intro code {
    background: #1a1a1a;
    color: var(--lc);
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 13px;
    font-family: 'Consolas', monospace;
    border: 1px solid #3d3d3d;
}

.ej-divider { height: 1px; background: #2d2d2d; margin: 20px 0; }

/* Pistas */
.btn-pista {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    padding: 9px 14px;
    background: transparent;
    border: 1px solid #3d3d3d;
    border-radius: 6px;
    color: #6b7280;
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-pista:hover { border-color: #f59e0b; color: #f59e0b; background: rgba(245,158,11,0.04); }

.pista-box {
    display: none;
    margin-top: 10px;
    padding: 13px 16px;
    background: rgba(245,158,11,0.06);
    border: 1px solid rgba(245,158,11,0.2);
    border-left: 3px solid #f59e0b;
    border-radius: 0 6px 6px 0;
    color: #fcd34d;
    font-size: 13px;
    line-height: 1.7;
}

/* ── Panel derecho — editor Mimo ── */
.ej-right {
    background: #1a1a1a;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.ej-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 16px;
    height: 48px;
    background: #252525;
    border-bottom: 1px solid #2d2d2d;
    flex-shrink: 0;
}
.ej-toolbar-title {
    font-size: 11px;
    font-weight: 700;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    flex: 1;
}

.btn-verificar {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 0 20px;
    height: 34px;
    background: var(--lc);
    border: none;
    border-radius: 6px;
    color: #000;
    font-size: 13px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: filter 0.2s, transform 0.15s;
    flex-shrink: 0;
}
.btn-verificar:hover  { filter: brightness(1.12); transform: translateY(-1px); }
.btn-verificar:active { transform: translateY(0); }

.btn-reset {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 0 12px;
    height: 34px;
    background: transparent;
    border: 1px solid #3d3d3d;
    border-radius: 6px;
    color: #6b7280;
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}
.btn-reset:hover { border-color: #555; color: #9ca3af; }

/* ── Área de código con huecos ── */
.ej-codigo-wrap {
    flex: 1;
    overflow-y: auto;
    padding: 7px;
    /* padding: 24px; */
    scrollbar-width: thin;
    scrollbar-color: #3d3d3d transparent;
}
.ej-codigo-wrap::-webkit-scrollbar       { width: 5px; }
.ej-codigo-wrap::-webkit-scrollbar-thumb { background: #3d3d3d; border-radius: 99px; }

.ej-codigo-block {
    background: #2d2d2d;
    border: 1px solid #3d3d3d;
    border-radius: 8px;
    padding: 20px 24px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 2.2;
    color: #d4d4d4;
    white-space: pre-wrap;
    word-break: break-word;
}

/* Inputs inline dentro del código */
.ej-hueco-input {
    display: inline-block;
    background: #1a1a1a;
    border: 2px solid #4e4e4e;
    border-radius: 4px;
    color: #f5f5f5;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    padding: 1px 8px;
    vertical-align: baseline;
    outline: none;
    transition: border-color 0.2s, background 0.2s;
    min-width: 60px;
}
.ej-hueco-input:focus { border-color: var(--lc); background: #111; }
.ej-hueco-input.ok    { border-color: #059669; background: rgba(5,150,105,0.12); color: #34d399; }
.ej-hueco-input.err   { border-color: #dc2626; background: rgba(220,38,38,0.1);  color: #f87171; }

/* Selects inline */
.ej-hueco-select {
    display: inline-block;
    background: #1e293b;
    border: 2px solid #334155;
    border-radius: 6px;
    color: #94a3b8;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    padding: 2px 26px 2px 8px;
    vertical-align: baseline;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s, color 0.2s;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%2364748b' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
}
.ej-hueco-select:focus { border-color: var(--lc); color: #f1f5f9; }
.ej-hueco-select.ok    { border-color: #059669; background-color: rgba(5,150,105,0.1); color: #34d399; }
.ej-hueco-select.err   { border-color: #dc2626; background-color: rgba(220,38,38,0.08); color: #f87171; }

/* ── Resultado ── */
.ej-resultado {
    flex-shrink: 0;
    padding: 10px 24px;
    border-top: 1px solid #2d2d2d;
    background: #1a1a1a;
    min-height: 44px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.ej-resultado-msg {
    font-size: 14px;
    font-weight: 600;
    display: none;
}
.ej-resultado-msg.ok  { color: #34d399; display: block; }
.ej-resultado-msg.err { color: #f87171; display: block; }
.ej-resultado-sub {
    font-size: 12px;
    color: #6b7280;
    display: none;
}
.ej-resultado-sub.show { display: block; }

/* ══════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════ */

@media (max-width: 900px) {
    .ej-wrap { grid-template-columns: 300px 1fr; }
}

@media (max-width: 768px) {
    .ej-index-grid { grid-template-columns: 1fr; }

    .section-head-actions .btn-try-it {
        width: auto;
        justify-content: center;
        white-space: nowrap;
    }

    .ej-wrap {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
        height: auto;
        min-height: calc(100vh - 126px);
    }
    .ej-left {
        max-height: 42vh;
        border-right: none;
        border-bottom: 1px solid #1e293b;
    }
    .ej-right    { min-height: 58vh; }
    .ej-titulo   { font-size: 17px; }
    .ej-toolbar {
        height: auto;
        min-height: 48px;
        padding: 10px 12px;
        flex-wrap: wrap;
    }
    .ej-toolbar-title { flex-basis: 100%; }
    .btn-reset,
    .btn-verificar {
        flex: 1;
        justify-content: center;
    }
    .ej-resultado { padding: 12px 16px; }
    .ej-codigo-wrap { padding: 16px; }
    .ej-codigo-block { font-size: 13px; padding: 14px 16px; }
    .ej-hueco-input,
    .ej-hueco-select { font-size: 13px; }
}