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

:root {
    --primary: #BB86FC;
    --primary-variant: #3700B3;
    --secondary: #03DAC6;
    --background: #121212;
    --surface: #1E1E1E;
    --surface-variant: #2D2D2D;
    --error: #CF6679;
    --on-primary: #000000;
    --on-secondary: #000000;
    --on-background: #FFFFFF;
    --on-surface: #FFFFFF;
    --on-error: #000000;
    --elevation-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --elevation-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --elevation-3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
}

body {
    font-family: 'Roboto', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--background);
    color: var(--on-background);
    min-height: 100vh;
    line-height: 1.5;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 440px;
    padding: 20px;
}

.login-box {
    background: var(--surface);
    padding: 48px 40px;
    border-radius: 16px;
    box-shadow: var(--elevation-3);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.login-box:hover {
    box-shadow: var(--elevation-2);
    transform: translateY(-2px);
}

/* Logo Container */
.logo-container {
    margin-bottom: 40px;
    text-align: center;
}

/* Logo Horizontal */
.logo-horizontal {
    height: 60px;
    width: auto;
    max-width: 280px;
    margin: 0 auto 20px;
    transition: all 0.3s ease;
    filter: brightness(0) invert(1); /* Hace el logo blanco si es necesario */
}

.logo-horizontal:hover {
    transform: translateY(-2px);
    filter: brightness(0) invert(1) drop-shadow(0 4px 8px rgba(187, 134, 252, 0.3));
}

/* Si el logo ya tiene colores, quita el filter */
.logo-horizontal.color-logo {
    filter: none;
}

.logo-horizontal.color-logo:hover {
    filter: drop-shadow(0 4px 8px rgba(187, 134, 252, 0.3));
}

.logo-container h1 {
    color: var(--on-surface);
    font-size: 28px;
    font-weight: 500;
    margin-bottom: 8px;
    letter-spacing: -0.25px;
}

.logo-subtitle {
    color: rgba(255, 255, 255, 0.7);
    font-size: 16px;
    font-weight: 400;
    margin: 0;
}

/* Login Form */
.login-form {
    text-align: left;
}

.form-group {
    margin-bottom: 24px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--on-surface);
    font-weight: 500;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    width: 100%;
    padding: 16px;
    background: var(--surface-variant);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--on-surface);
    font-family: inherit;
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--surface);
    box-shadow: 0 0 0 3px rgba(187, 134, 252, 0.1);
}

.form-group input:hover {
    border-color: rgba(255, 255, 255, 0.2);
}

/* Login Button */
.login-btn {
    width: 100%;
    padding: 16px;
    background: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 0.75px;
    margin-top: 8px;
    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: left 0.5s;
}

.login-btn:hover {
    background: var(--primary-variant);
    transform: translateY(-2px);
    box-shadow: var(--elevation-2);
}

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

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

/* Additional Links */
.links {
    margin-top: 32px;
    display: flex;
    justify-content: space-between;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.links a {
    color: var(--primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.links a:hover {
    color: var(--secondary);
}

.links a:hover::after {
    width: 100%;
}

/* Error States */
.form-group.error input {
    border-color: var(--error);
    box-shadow: 0 0 0 3px rgba(207, 102, 121, 0.1);
}

.error-message {
    color: var(--error);
    font-size: 12px;
    margin-top: 6px;
    display: block;
}

/* Success States */
.form-group.success input {
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(3, 218, 198, 0.1);
}

/* Loading State */
.login-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.login-btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top: 2px solid var(--on-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .login-container {
        padding: 10px;
        max-width: 100%;
    }
    
    .login-box {
        padding: 40px 24px;
        margin: 0 10px;
    }
    
    .logo-horizontal {
        height: 50px;
        max-width: 240px;
    }
    
    .logo-container h1 {
        font-size: 24px;
    }
    
    .logo-subtitle {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .login-box {
        padding: 32px 20px;
    }
    
    .logo-horizontal {
        height: 45px;
        max-width: 200px;
    }
    
    .logo-container h1 {
        font-size: 22px;
    }
    
    .form-group input {
        padding: 14px;
    }
    
    .login-btn {
        padding: 14px;
    }
    
    .links {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

/* Dark mode scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface-variant);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-variant);
}

/* Focus styles for accessibility */
.form-group input:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.login-btn:focus-visible {
    outline: 2px solid var(--on-primary);
    outline-offset: 2px;
}