/* =============================================
   PORTAL DE PAGOS SURBIT - ESTILOS CORPORATIVOS
   ============================================= */

:root {
    /* Colores corporativos SurBit */
    --surbit-morado: #5B2C8E;
    --surbit-morado-oscuro: #451F6B;
    --surbit-verde: #A6CE39;
    --surbit-verde-oscuro: #8AB82C;
    --surbit-amarillo: #F4D03F;
    --surbit-blanco: #FFFFFF;
    --surbit-gris-claro: #F8F9FA;
    --surbit-gris: #6C757D;
    --surbit-gris-oscuro: #343A40;
    --surbit-error: #E74C3C;
    --surbit-exito: #27AE60;
    
    /* Sombras */
    --shadow-sm: 0 2px 4px rgba(91, 44, 142, 0.08);
    --shadow-md: 0 4px 12px rgba(91, 44, 142, 0.12);
    --shadow-lg: 0 10px 30px rgba(91, 44, 142, 0.20);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--surbit-morado) 0%, var(--surbit-morado-oscuro) 100%);
    padding: 20px;
    position: relative;
}

/* Patrón decorativo de fondo */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(166, 206, 57, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(166, 206, 57, 0.10) 0%, transparent 50%);
    pointer-events: none;
}

.portal-container {
    background: var(--surbit-blanco);
    border-radius: 20px;
    padding: 40px;
    max-width: 480px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

/* Barra superior con colores corporativos */
.portal-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--surbit-morado) 0%, var(--surbit-verde) 100%);
}

/* =============================================
   HEADER CON LOGO
   ============================================= */
.header-portal {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #F0F0F0;
}

.logo-surbit {
    max-width: 200px;
    height: auto;
    margin-bottom: 15px;
}

.header-portal .titulo {
    font-size: 24px;
    color: var(--surbit-morado);
    font-weight: 700;
    margin-bottom: 5px;
}

.header-portal .subtitulo {
    color: var(--surbit-gris);
    font-size: 14px;
}

/* =============================================
   FORMULARIO
   ============================================= */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--surbit-gris-oscuro);
    font-weight: 600;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #E0E0E0;
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s;
    font-family: inherit;
}

.form-group input:focus {
    border-color: var(--surbit-morado);
    outline: none;
    box-shadow: 0 0 0 3px rgba(91, 44, 142, 0.1);
}

.input-icon {
    position: relative;
}

.input-icon .icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
    pointer-events: none;
}

.input-icon input {
    padding-left: 45px;
}

/* =============================================
   BOTÓN PRINCIPAL
   ============================================= */
.btn-consultar {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--surbit-morado) 0%, var(--surbit-morado-oscuro) 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn-consultar::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-consultar:hover::before {
    left: 100%;
}

.btn-consultar:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(91, 44, 142, 0.4);
}

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

.btn-consultar:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* =============================================
   CAPTCHA
   ============================================= */
.captcha-display {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--surbit-gris-claro);
    padding: 12px 15px;
    border-radius: 10px;
    border: 2px solid #E0E0E0;
    flex-wrap: wrap;
}

.captcha-code {
    font-family: 'Courier New', monospace;
    font-size: 28px;
    font-weight: bold;
    letter-spacing: 6px;
    background: white;
    padding: 8px 18px;
    border-radius: 8px;
    border: 2px solid #D0D5DC;
    user-select: none;
    min-width: 120px;
    text-align: center;
    display: inline-block;
}

.captcha-code span {
    display: inline-block;
    margin: 0 2px;
}

.captcha-refresh {
    background: white;
    border: 2px solid #E0E0E0;
    font-size: 20px;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 8px;
    transition: all 0.3s;
    color: var(--surbit-morado);
}

.captcha-refresh:hover {
    background: var(--surbit-morado);
    color: white;
    border-color: var(--surbit-morado);
    transform: rotate(180deg);
}

.captcha-input {
    flex: 1;
    min-width: 80px;
    max-width: 120px;
}

.captcha-input input {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid #E0E0E0;
    border-radius: 8px;
    font-size: 18px;
    text-align: center;
    letter-spacing: 4px;
    text-transform: uppercase;
    font-weight: 700;
}

.captcha-input input:focus {
    border-color: var(--surbit-morado);
    outline: none;
}

.captcha-input input.captcha-valid {
    border-color: var(--surbit-exito) !important;
    background-color: #F0FFF4 !important;
}

.captcha-input input.captcha-invalid {
    border-color: var(--surbit-error) !important;
    background-color: #FFF5F5 !important;
}

.captcha-label {
    font-size: 12px;
    color: var(--surbit-gris);
    margin-top: 4px;
}

.captcha-error {
    color: var(--surbit-error);
    font-size: 12px;
    margin-top: 5px;
    display: none;
}

.captcha-error.visible { display: block; }

.captcha-success {
    color: var(--surbit-exito);
    font-size: 12px;
    margin-top: 5px;
    display: none;
}

.captcha-success.visible { display: block; }

/* =============================================
   MENSAJES
   ============================================= */
.mensaje {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 14px;
}

.mensaje.error {
    background: #FDE8E8;
    color: #C0392B;
    border-left: 4px solid var(--surbit-error);
}

.mensaje.success {
    background: #E8F8E8;
    color: var(--surbit-exito);
    border-left: 4px solid var(--surbit-exito);
}

/* =============================================
   BADGES DE SEGURIDAD
   ============================================= */
.security-badge {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
    font-size: 11px;
    color: var(--surbit-gris);
    flex-wrap: wrap;
}

.security-badge span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
    text-align: center;
    margin-top: 20px;
    color: var(--surbit-gris);
    font-size: 12px;
}

.footer a {
    color: var(--surbit-morado);
    text-decoration: none;
    font-weight: 600;
}

/* =============================================
   OVERLAY DE CARGA
   ============================================= */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(91, 44, 142, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(3px);
}

.loading-overlay.active { display: flex; }

.loading-spinner {
    background: white;
    padding: 30px 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.loading-spinner .spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid #F3F3F3;
    border-top: 4px solid var(--surbit-morado);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* =============================================
   RESPONSIVE - MÓVILES
   ============================================= */
@media (max-width: 768px) {
    body {
        padding: 15px;
        align-items: flex-start;
        padding-top: 30px;
    }
    
    .portal-container {
        padding: 30px 25px;
        border-radius: 16px;
    }
    
    .logo-surbit {
        max-width: 160px;
    }
    
    .header-portal .titulo {
        font-size: 20px;
    }
    
    .header-portal .subtitulo {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
        padding-top: 20px;
    }
    
    .portal-container {
        padding: 25px 20px;
        border-radius: 14px;
    }
    
    .logo-surbit {
        max-width: 140px;
    }
    
    .header-portal .titulo {
        font-size: 18px;
    }
    
    .form-group input {
        padding: 12px 14px;
        font-size: 16px;
    }
    
    .input-icon input {
        padding-left: 42px;
    }
    
    .btn-consultar {
        padding: 14px;
        font-size: 15px;
    }
    
    .captcha-display {
        padding: 10px;
        gap: 8px;
    }
    
    .captcha-code {
        font-size: 22px;
        padding: 6px 12px;
        letter-spacing: 4px;
        min-width: 100px;
    }
    
    .captcha-refresh {
        padding: 6px 10px;
        font-size: 18px;
    }
    
    .captcha-input input {
        font-size: 16px;
        padding: 8px 10px;
    }
    
    .security-badge {
        gap: 10px;
        font-size: 10px;
    }
    
    .footer {
        font-size: 11px;
    }
}