/* Login Profesional - Morado y Negro con Logo Optimizado */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #0a0a0f;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(120, 81, 169, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 90% 80%, rgba(147, 51, 234, 0.12) 0%, transparent 50%),
        linear-gradient(180deg, #0a0a0f 0%, #16213e 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
}

/* Partículas flotantes en el fondo */
body::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, rgba(147, 51, 234, 0.3), transparent),
        radial-gradient(2px 2px at 60% 70%, rgba(120, 81, 169, 0.3), transparent),
        radial-gradient(1px 1px at 50% 50%, rgba(168, 85, 247, 0.3), transparent),
        radial-gradient(1px 1px at 80% 10%, rgba(147, 51, 234, 0.3), transparent);
    background-size: 200px 200px, 300px 300px, 250px 250px, 150px 150px;
    background-position: 0 0, 40px 60px, 130px 270px, 70px 100px;
    animation: particleFloat 20s linear infinite;
    opacity: 0.4;
    pointer-events: none;
}

@keyframes particleFloat {
    0% { transform: translateY(0); }
    100% { transform: translateY(-100px); }
}

/* Contenedor del login */
.login-container {
    background: rgba(15, 15, 25, 0.9);
    border: 1px solid rgba(120, 81, 169, 0.2);
    border-radius: 20px;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.6),
        0 0 40px rgba(120, 81, 169, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    overflow: hidden;
    max-width: 420px;
    width: 100%;
    backdrop-filter: blur(20px);
    position: relative;
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header con gradiente morado */
.login-header {
    background: linear-gradient(135deg, #7851a9 0%, #9333ea 100%);
    padding: 60px 30px 50px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Efecto de ondas en el header */
.login-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 200%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    animation: wave 3s ease-in-out infinite;
}

@keyframes wave {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Contenedor del logo */
.logo-container {
    position: relative;
    z-index: 1;
}

/* Logo optimizado */
.login-logo {
    max-width: 160px;
    width: 80%;
    height: auto;
    display: block;
    margin: 0 auto;
    filter: 
        drop-shadow(0 8px 16px rgba(0, 0, 0, 0.3))
        brightness(1.1);
    animation: logoFadeIn 0.8s ease-out 0.2s backwards;
    transition: transform 0.3s ease;
}

@keyframes logoFadeIn {
    0% {
        opacity: 0;
        transform: scale(0.8) translateY(20px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.login-logo:hover {
    transform: scale(1.05);
}

/* Formulario */
.login-form {
    padding: 40px 30px;
    background: rgba(10, 10, 15, 0.4);
}

/* Grupo de inputs */
.form-group {
    margin-bottom: 24px;
    animation: slideIn 0.5s ease-out backwards;
}

.form-group:nth-child(2) { animation-delay: 0.1s; }
.form-group:nth-child(3) { animation-delay: 0.2s; }

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

.form-group label {
    display: block;
    color: #b8b8c8;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Wrapper de input con icono */
.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
    opacity: 0.6;
    transition: all 0.3s ease;
    pointer-events: none;
}

.input-wrapper:focus-within .input-icon {
    opacity: 1;
}

.form-group input {
    width: 100%;
    padding: 14px 20px 14px 48px;
    background: rgba(20, 20, 30, 0.6);
    border: 1px solid rgba(120, 81, 169, 0.2);
    border-radius: 12px;
    color: #ffffff;
    font-size: 15px;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    background: rgba(25, 25, 40, 0.8);
    border-color: #9333ea;
    box-shadow: 
        0 0 0 3px rgba(147, 51, 234, 0.1),
        0 4px 12px rgba(120, 81, 169, 0.2);
}

.form-group input::placeholder {
    color: rgba(184, 184, 200, 0.5);
}

.form-group input:-webkit-autofill {
    -webkit-box-shadow: 0 0 0 1000px rgba(20, 20, 30, 0.9) inset !important;
    -webkit-text-fill-color: #ffffff !important;
}

/* Botón de login */
.login-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #7851a9 0%, #9333ea 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    margin-top: 10px;
    box-shadow: 0 8px 20px rgba(120, 81, 169, 0.3);
    animation: slideIn 0.5s ease-out 0.3s backwards;
}

.login-btn::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 ease;
}

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

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(120, 81, 169, 0.4);
}

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

#btnText {
    position: relative;
    z-index: 1;
}

/* Alertas */
.alert {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 14px;
    border-left: 3px solid;
    animation: alertSlide 0.3s ease-out;
}

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

.alert-error {
    background: rgba(220, 53, 69, 0.1);
    border-color: #dc3545;
    color: #ff6b6b;
}

.alert-success {
    background: rgba(40, 167, 69, 0.1);
    border-color: #28a745;
    color: #51cf66;
}

/* Loading */
.loading {
    display: none;
    text-align: center;
    padding: 20px;
    color: #b8b8c8;
}

.spinner {
    border: 3px solid rgba(120, 81, 169, 0.2);
    border-top-color: #9333ea;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 12px;
}

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

.loading p {
    font-size: 14px;
}

/* Responsive - Tablet */
@media (max-width: 768px) {
    .login-container {
        max-width: 380px;
    }
    
    .login-header {
        padding: 50px 25px 40px;
    }
    
    .login-logo {
        max-width: 140px;
    }
    
    .login-form {
        padding: 35px 25px;
    }
}

/* Responsive - Mobile */
@media (max-width: 480px) {
    body {
        padding: 15px;
    }
    
    .login-container {
        max-width: 100%;
        border-radius: 16px;
    }
    
    .login-header {
        padding: 40px 20px 35px;
    }
    
    .login-logo {
        max-width: 120px;
    }
    
    .login-form {
        padding: 30px 20px;
    }
    
    .form-group {
        margin-bottom: 20px;
    }
    
    .form-group input {
        padding: 13px 18px 13px 45px;
        font-size: 14px;
    }
    
    .input-icon {
        left: 14px;
        font-size: 16px;
    }
    
    .login-btn {
        padding: 14px;
        font-size: 14px;
    }
}

/* Mobile muy pequeño */
@media (max-width: 360px) {
    .login-header {
        padding: 35px 15px 30px;
    }
    
    .login-logo {
        max-width: 100px;
    }
    
    .login-form {
        padding: 25px 15px;
    }
}