/* =====================================================
   LOGIN PAGE - DISEÑO ELEGANTE
   Paleta: Rojo Corporativo, Azul Profundo, Blanco
   ===================================================== */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700&family=Source+Sans+3:wght@300;400;500;600;700&display=swap');

:root {
    --primary-red: #C41E3A;
    --primary-red-dark: #9B1B30;
    --primary-blue: #1E3A5F;
    --primary-blue-dark: #0F1F33;
    --accent-navy: #0D2137;
    --white-pure: #FFFFFF;
    --gray-100: #E2E8F0;
    --gray-400: #64748B;
    --gray-600: #334155;
    --gray-700: #1E293B;
    --success: #059669;
    --danger: #DC2626;
    
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    
    --shadow-xl: 0 16px 48px rgba(15, 23, 42, 0.2);
    
    --transition-base: 250ms ease;
}

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

body {
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-navy) 50%, var(--primary-blue-dark) 100%);
    position: relative;
    overflow: hidden;
}

/* Elementos decorativos de fondo */
body::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(196, 30, 58, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

body::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(196, 30, 58, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.05); }
}

/* Contenedor de login */
.login-container {
    max-width: 440px;
    width: 100%;
    background: var(--white-pure);
    padding: 48px 40px;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    position: relative;
    z-index: 1;
    animation: slideUp 0.6s ease-out;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-red), var(--primary-blue));
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

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

/* Header del login */
.login-header {
    text-align: center;
    margin-bottom: 36px;
}

.login-header h1 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.login-header p {
    font-size: 1rem;
    color: var(--gray-400);
    font-weight: 400;
}

/* Formulario */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input {
    font-family: var(--font-body);
    font-size: 1rem;
    padding: 16px 18px;
    border: 2px solid var(--gray-100);
    border-radius: var(--radius-lg);
    background: var(--white-pure);
    color: var(--gray-700);
    transition: var(--transition-base);
    outline: none;
}

.form-group input:hover {
    border-color: #CBD5E1;
}

.form-group input:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(30, 58, 95, 0.1);
}

.form-group input::placeholder {
    color: var(--gray-400);
    font-style: italic;
}

/* Botón de login */
.login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 16px 24px;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-dark) 100%);
    color: var(--white-pure);
    box-shadow: 0 4px 20px rgba(196, 30, 58, 0.3);
    position: relative;
    overflow: hidden;
}

.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: 0.5s;
}

.login-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(196, 30, 58, 0.4);
}

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

.login-btn:active {
    transform: translateY(-1px);
}

.login-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.login-btn.loading::after {
    content: '';
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: var(--white-pure);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: 10px;
}

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

/* Mensajes de error y éxito */
.error-message {
    background: linear-gradient(135deg, #FEE2E2, #FECACA);
    color: #991B1B;
    padding: 16px 20px;
    border-radius: var(--radius-lg);
    text-align: center;
    font-weight: 500;
    border-left: 4px solid var(--danger);
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    75% { transform: translateX(8px); }
}

.success-message {
    background: linear-gradient(135deg, #D1FAE5, #A7F3D0);
    color: #065F46;
    padding: 16px 20px;
    border-radius: var(--radius-lg);
    text-align: center;
    font-weight: 500;
    border-left: 4px solid var(--success);
}

/* Info box para primera instalación */
.info-box {
    background: linear-gradient(135deg, #E0F2FE, #BAE6FD);
    color: #075985;
    padding: 20px;
    border-radius: var(--radius-lg);
    margin-top: 24px;
    border-left: 4px solid #0284C7;
}

.info-box h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: #0C4A6E;
}

.info-box p {
    font-size: 0.9rem;
    margin-bottom: 0;
    line-height: 1.6;
}

.credentials {
    background: var(--white-pure);
    padding: 14px 18px;
    border-radius: var(--radius-lg);
    margin-top: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    border: 1px solid rgba(7, 89, 133, 0.2);
}

.credentials strong {
    color: var(--primary-blue);
}

/* Versión */
.version {
    text-align: center;
    margin-top: 28px;
    color: var(--gray-400);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* Responsive */
@media (max-width: 480px) {
    .login-container {
        padding: 36px 24px;
        margin: 10px;
    }
    
    .login-header h1 {
        font-size: 1.6rem;
    }
    
    .form-group input {
        padding: 14px 16px;
    }
}

/* Reducir movimiento */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}