/* --- Hoja de Estilos para Work Time Calculator --- */

/* --- 1. Variables y Estilos Globales --- */
:root {
    /* Paleta de colores - Tema Claro */
    --bg-color: #f9fafb;
    --text-color: #1f2937;
    --card-bg-color: #ffffff;
    --border-color: #e5e7eb;
    --primary-color: #2563eb;
    --primary-text-color: #ffffff;
    --subtle-text-color: #4b5563;
    --result-bg-color: #eff6ff;
    --result-border-color: #bfdbfe;
    --result-text-color: #1e40af;
    --error-color: #dc2626;
    --shadow-color: rgba(0, 0, 0, 0.05);
}

body.dark-theme {
    /* Paleta de colores - Tema Oscuro */
    --bg-color: #111827;
    --text-color: #d1d5db;
    --card-bg-color: #1f2937;
    --border-color: #374151;
    --primary-color: #3b82f6;
    --subtle-text-color: #9ca3af;
    --result-bg-color: #1e293b;
    --result-border-color: #1e40af;
    --result-text-color: #93c5fd;
    --error-color: #ef4444;
    --shadow-color: rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    line-height: 1.6;
}

main {
    max-width: 42rem; /* 672px */
    margin: 0 auto;
    padding: 1rem;
}

/* --- 2. Controles (Header) --- */
.controls-container {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    max-width: 42rem;
    margin: 0 auto;
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--subtle-text-color);
}
.theme-toggle-btn:hover {
    background-color: var(--border-color);
}

.icon {
    width: 1.25rem;
    height: 1.25rem;
    fill: currentColor;
}
body:not(.dark-theme) #theme-toggle-light-icon,
body.dark-theme #theme-toggle-dark-icon {
    display: none;
}


.lang-selector {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.25rem;
}
.lang-btn {
    background: none;
    border: none;
    padding: 0.25rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.375rem;
    cursor: pointer;
    color: var(--subtle-text-color);
    transition: background-color 0.2s, color 0.2s;
}
.lang-btn.active {
    background-color: var(--primary-color);
    color: var(--primary-text-color);
}

/* --- 3. Card Principal --- */
.card {
    background-color: var(--card-bg-color);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 12px var(--shadow-color);
    text-align: center;
    transition: background-color 0.3s;
}

.card h1 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.card .subtitle {
    color: var(--subtle-text-color);
    margin-bottom: 2rem;
}

/* --- 4. Formulario y Botones --- */
.decimal-input {
    width: 100%;
    text-align: center;
    font-size: 1.5rem;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: border-color 0.2s, background-color 0.3s;
}
.decimal-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.calculate-btn {
    width: 100%;
    margin-top: 1rem;
    background-color: var(--primary-color);
    color: var(--primary-text-color);
    font-weight: 700;
    font-size: 1.125rem;
    padding: 1rem;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: transform 0.2s, opacity 0.2s;
}
.calculate-btn:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

/* --- 5. Cajas de Resultado y Error --- */
.hidden {
    display: none;
}
.result-box, .error-box {
    margin-top: 2rem;
    padding: 1.5rem;
    border-radius: 1rem;
    animation: fadeIn 0.5s ease-in-out;
}
.result-box {
    background-color: var(--result-bg-color);
    border: 2px solid var(--result-border-color);
}
.result-box p:first-child {
    font-size: 1.125rem;
    color: var(--subtle-text-color);
    margin-bottom: 0.25rem;
}
.result-output {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--result-text-color);
}

.error-box {
    color: var(--error-color);
    font-weight: 500;
}

/* --- 6. Secciones (Explicación, FAQ, Legal) y Footer --- */
.explanation-section, .legal-content { margin-top: 3rem; }
.explanation-section h2, .legal-content h1, .legal-content h2, .legal-content h3 { font-weight: 700; margin-bottom: 1rem; }
.legal-content h1 { font-size: 2rem; color: var(--primary-color); }
.legal-content h2 { font-size: 1.5rem; margin-top: 2rem; }
.legal-content p, .legal-content ul { margin-bottom: 1rem; }
.legal-content ul { list-style-position: inside; }
.explanation-section p { margin-bottom: 1rem; }
.explanation-section code { background-color: var(--code-bg); padding: 0.2rem 0.4rem; border-radius: 0.25rem; font-size: 0.9em; }

.faq-container { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border-color); }
.faq-container h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 1.5rem; }
.faq-item { margin-bottom: 1.5rem; }
.faq-item h4 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.5rem; }
.conversion-list { list-style-type: disc; padding-left: 20px; margin-top: 0.5rem; }

.back-link-container { margin-top: 3rem; }
.back-link, .privacy-link { color: var(--primary-color); text-decoration: none; }
.back-link:hover, .privacy-link:hover { text-decoration: underline; }

footer {
    text-align: center; padding: 2rem 1rem; color: var(--subtle-text-color);
    font-size: 0.875rem; border-top: 1px solid var(--border-color); margin-top: 2rem;
}
footer .mb-4 { margin-bottom: 1rem; }

/* --- 7. placeholders de anuncios y animaciones --- */
.ad-placeholder-top { min-height: 5rem; }
.ad-placeholder-bottom { min-height: 5rem; margin-top: 2rem; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- 8. Responsividad --- */
@media (max-width: 640px) {
    .card { padding: 1.5rem; }
    .card h1, .legal-content h1 { font-size: 1.75rem; }
    .result-output { font-size: 1.75rem; }
}