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

:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 600px;
}

.card {
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 40px;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header {
    text-align: center;
    margin-bottom: 30px;
}

.icon {
    font-size: 48px;
    margin-bottom: 15px;
    animation: bounce 2s infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

h1 {
    color: var(--text-primary);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

.form-group {
    margin-bottom: 30px;
}

label {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 14px;
}

.input-wrapper {
    position: relative;
}

.input-field {
    width: 100%;
    padding: 16px 20px;
    font-size: 24px;
    font-weight: 600;
    text-align: center;
    letter-spacing: 2px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    outline: none;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.input-field:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.input-field.valid {
    border-color: var(--success-color);
    background-color: #ecfdf5;
}

.input-field.invalid {
    border-color: var(--error-color);
    background-color: #fef2f2;
}

.input-hint {
    display: block;
    text-align: center;
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

.mensaje {
    margin-top: 15px;
    padding: 15px;
    border-radius: 10px;
    font-weight: 500;
    text-align: center;
    display: none;
    animation: fadeIn 0.3s ease;
}

.mensaje.error {
    display: block;
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid var(--success-color);
}

.mensaje.success {
    display: block;
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid var(--error-color);
}

.mensaje.warning {
    display: block;
    background-color: #fef3c7;
    color: #92400e;
    border: 1px solid var(--warning-color);
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.info-section {
    background-color: #f9fafb;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

.info-section h3 {
    color: var(--text-primary);
    font-size: 16px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.rangos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
}

.rango-item {
    background: white;
    padding: 12px;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    font-size: 13px;
}

.rango-item .rango-num {
    font-weight: 700;
    color: var(--primary-color);
    font-family: monospace;
    font-size: 14px;
}

.rango-item .rango-desc {
    color: var(--text-secondary);
    margin-top: 4px;
}

.history-section {
    background-color: #f9fafb;
    border-radius: 12px;
    padding: 20px;
}

.history-section h3 {
    color: var(--text-primary);
    font-size: 16px;
    margin-bottom: 15px;
}

.historial-lista {
    list-style: none;
    max-height: 200px;
    overflow-y: auto;
}

.historial-item {
    padding: 10px;
    margin-bottom: 8px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.historial-item.invalid {
    background-color: #d1fae5;
    color: #065f46;
}

.historial-item.valid {
    background-color: #fee2e2;
    color: #991b1b;
}

.historial-item .numero {
    font-weight: 600;
    font-family: monospace;
}

.historial-item .estado {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.5);
}

/* Responsive */
@media (max-width: 640px) {
    .card {
        padding: 25px;
    }

    h1 {
        font-size: 22px;
    }

    .input-field {
        font-size: 20px;
        padding: 14px 16px;
    }

    .rangos-grid {
        grid-template-columns: 1fr;
    }
}

/* Loading spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, .3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}


/* Agregar al final del archivo styles.css */

.rango-item {
    background: white;
    padding: 12px;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    font-size: 13px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.rango-item:hover {
    transform: translateX(5px);
}

.rango-item.highlighted {
    background: #ecfdf5;
    border-left-color: var(--success-color);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

/* Animación de entrada para rangos */
@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.02);
    }

    100% {
        transform: scale(1);
    }
}

.rango-item.active-match {
    animation: pulse 1s infinite;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.rango-item.active-match .rango-num,
.rango-item.active-match .rango-desc,
.rango-item.active-match .rango-full {
    color: white;
}

/* Indicador de prefijo */
.prefijo-indicator {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 700;
    font-family: monospace;
    margin: 0 5px;
}

/* Mejoras en el input para mostrar el prefijo */
.input-wrapper {
    position: relative;
}

.prefijo-visual {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.input-field:focus~.prefijo-visual,
.input-field:not(:placeholder-shown)~.prefijo-visual {
    opacity: 1;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}