/* ============================================
   SIMPLIFICADOR BOOLEANO - ESTILOS MEJORADOS
   ============================================ */

/* --- Variables de Color --- */

:root {
    /* Paleta personalizada Borgoña/Vino */
    --bg-primary: #401010;
    --bg-gradient-start: #401010;
    --bg-gradient-end: #401010;
    --container-bg: #F5F5F5;
    --input-bg: #FFFFFF;
    --input-border: #e2e8f0;
    --input-focus: #401010;
    --btn-bg: #401010;
    --btn-hover: #6a1a1a;
    --result-bg: #FFFFFF;
    --result-border: #e2e8f0;
    --text-primary: #505050;
    --text-secondary: #401010;
    --header-color: #401010;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    --success-color: #48bb78;
    --error-color: #f56565;
    --warning-color: #ed8936;
    --info-color: #4299e1;
    --accent-color: #401010;
}

/* Modo Oscuro */

[data-theme="dark"] {
    --bg-primary: #401010;
    --bg-gradient-start: #401010;
    --bg-gradient-end: #401010;
    --container-bg: #2d1515;
    --input-bg: #401010;
    --input-border: #6a1a1a;
    --input-focus: #F5F5F5;
    --btn-bg: #401010;
    --btn-hover: #6a1a1a;
    --result-bg: #401010;
    --result-border: #6a1a1a;
    --text-primary: #F5F5F5;
    --text-secondary: #F5F5F5;
    --header-color: #F5F5F5;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.6);
}

/* --- Reset y Estilos Base --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    transition: background 0.3s ease, color 0.3s ease;
    position: relative;
}

/* Patrón de fondo animado */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* --- Botón de Tema --- */

/* --- Contenedor Principal --- */
.simplifier-container {
    width: 100%;
    max-width: 600px;
    background: var(--container-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Header Section --- */
.header-section {
    text-align: center;
    margin-bottom: 35px;
}


.icon-wrapper {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: none;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: none;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.icon-wrapper i {
    font-size: 2.5rem;
    color: white;
}

h1 {
    color: var(--header-color);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 400;
}

/* --- Controles de Entrada --- */
.input-controls {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-bottom: 30px;
}

.control-group {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.control-group label {
    margin-bottom: 10px;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-group label i {
    color: var(--accent-color);
    font-size: 1.1rem;
}

/* Select personalizado */
.select-wrapper {
    position: relative;
}

.select-wrapper select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

.select-icon {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

select {
    width: 100%;
    padding: 14px 40px 14px 16px;
    border: 2px solid var(--input-border);
    border-radius: 12px;
    background: var(--input-bg);
    font-size: 1rem;
    color: var(--text-primary);
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
}

input[type="text"] {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--input-border);
    border-radius: 12px;
    background: var(--input-bg);
    font-size: 1rem;
    color: var(--text-primary);
    font-family: 'Poppins', sans-serif;
    transition: all 0.3s ease;
}

input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

.input-hint {
    margin-top: 6px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-style: italic;
}

/* --- Ejemplos Rápidos --- */
.quick-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    padding: 15px;
    background: var(--result-bg);
    border-radius: 12px;
    border: 1px solid var(--result-border);
}

.examples-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-right: 5px;
}

.example-btn {
    padding: 6px 14px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
}

.example-btn:hover {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.example-btn:active {
    transform: translateY(0);
}

/* --- Botón Principal --- */
.btn {
    width: 100%;
    background: var(--btn-bg);
    border: none;
    border-radius: 12px;
    padding: 16px 24px;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: var(--shadow-md);
    font-family: 'Poppins', sans-serif;
}

.btn:hover {
    background: var(--btn-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn:active {
    transform: translateY(0);
}

.btn i {
    font-size: 1rem;
}

/* --- Contenedor de Resultado --- */
#result-container {
    margin-top: 30px;
    padding: 25px;
    background: var(--result-bg);
    border-radius: 16px;
    border: 2px solid var(--result-border);
    text-align: left;
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.8;
    box-shadow: var(--shadow-sm);
    transition: all 0.4s ease;
    animation: slideIn 0.4s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#result-container.result-hidden {
    opacity: 0.7;
}

.result-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 15px;
    background: var(--info-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

#result-container.result-success .result-icon {
    background: var(--success-color);
}

#result-container.result-error .result-icon {
    background: var(--error-color);
}

#result-container p {
    margin: 10px 0;
}

.final-expression {
    font-size: 1.5rem !important;
    font-family: 'Courier New', Courier, monospace;
    font-weight: 700 !important;
    color: var(--accent-color) !important;
    padding: 20px;
    background: var(--input-bg);
    border-radius: 12px;
    border: 2px dashed var(--accent-color);
    text-align: center;
    margin: 15px 0;
    word-break: break-word;
    box-shadow: var(--shadow-sm);
}

.error {
    color: var(--error-color) !important;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.error::before {
    content: '⚠';
    font-size: 1.3rem;
}

/* --- Footer --- */
.app-footer {
    margin-top: 30px;
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    position: relative;
    z-index: 1;
}

.app-footer i {
    color: #ff6b6b;
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    25% {
        transform: scale(1.2);
    }
    50% {
        transform: scale(1);
    }
}

/* --- Responsive Design --- */
@media (max-width: 640px) {
    .simplifier-container {
        padding: 30px 25px;
        border-radius: 20px;
    }

    h1 {
        font-size: 1.6rem;
    }

    .icon-wrapper {
        width: 60px;
        height: 60px;
    }

    .icon-wrapper i {
        font-size: 2rem;
    }

    .btn {
        padding: 14px 20px;
        font-size: 1rem;
    }

    .final-expression {
        font-size: 1.2rem !important;
        padding: 15px;
    }

    .quick-examples {
        flex-direction: column;
        align-items: flex-start;
    }

    .example-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    body {
        padding: 20px 15px;
    }

    .theme-toggle {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }

    .simplifier-container {
        padding: 25px 20px;
    }

    h1 {
        font-size: 1.4rem;
    }
}