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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, #0f1419 0%, #1a2332 50%, #0f1419 100%);
            color: white;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }

        /* Header */
        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 40px;
            position: relative;
            z-index: 10;
        }

        .logo {
            display: flex;
            align-items: center;
            font-size: 18px;
            font-weight: 600;
            color: #4a9eff;
            text-decoration: none;
        }

        .logo-icon {
            width: 24px;
            height: 24px;
            margin-right: 8px;
            background: linear-gradient(45deg, #4a9eff, #00d4ff);
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 14px;
        }

        .back-btn {
            background: rgba(74, 158, 255, 0.1);
            border: 1px solid rgba(74, 158, 255, 0.3);
            color: #4a9eff;
            padding: 12px 24px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .back-btn:hover {
            background: rgba(74, 158, 255, 0.2);
            border-color: #4a9eff;
        }

        /* Main Content */
        .main-content {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 40px 20px;
            position: relative;
        }

        .auth-container {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            padding: 50px 40px;
            width: 100%;
            max-width: 420px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            position: relative;
            z-index: 5;
        }

        .auth-title {
            text-align: center;
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 10px;
            background: linear-gradient(135deg, #ffffff 0%, #a0a9c0 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .auth-subtitle {
            text-align: center;
            color: #8892a6;
            margin-bottom: 40px;
            font-size: 16px;
        }

        .auth-tabs {
            display: flex;
            margin-bottom: 30px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 12px;
            padding: 4px;
        }

        .tab-btn {
            flex: 1;
            padding: 12px;
            border: none;
            background: transparent;
            color: #8892a6;
            font-size: 14px;
            font-weight: 500;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .tab-btn.active {
            background: linear-gradient(135deg, #4a9eff 0%, #0066cc 100%);
            color: white;
            box-shadow: 0 4px 16px rgba(74, 158, 255, 0.3);
        }

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

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            margin-bottom: 8px;
            color: #a0a9c0;
            font-size: 14px;
            font-weight: 500;
        }

        .form-input {
            width: 100%;
            padding: 14px 16px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            color: white;
            font-size: 16px;
            transition: all 0.3s ease;
        }

        .form-input:focus {
            outline: none;
            border-color: #4a9eff;
            box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.1);
        }

        .form-input::placeholder {
            color: #6b7280;
        }

        .submit-btn {
            width: 100%;
            padding: 16px;
            border: none;
            border-radius: 12px;
            background: linear-gradient(135deg, #4a9eff 0%, #0066cc 100%);
            color: white;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 8px 32px rgba(74, 158, 255, 0.3);
            margin-bottom: 20px;
        }

        .submit-btn:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(74, 158, 255, 0.4);
        }

        .submit-btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 2px solid #ffffff30;
            border-top: 2px solid white;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

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

        .divider {
            display: flex;
            align-items: center;
            margin: 30px 0;
            color: #6b7280;
            font-size: 14px;
        }

        .divider::before,
        .divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: rgba(255, 255, 255, 0.1);
        }

        .divider span {
            padding: 0 20px;
        }

        .social-login {
            display: flex;
            gap: 12px;
        }

        .social-btn {
            flex: 1;
            padding: 12px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            color: #a0a9c0;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .social-btn:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #4a9eff;
        }

        .forgot-link {
            text-align: center;
            margin-top: 20px;
        }

        .forgot-link a {
            color: #4a9eff;
            text-decoration: none;
            font-size: 14px;
        }

        .forgot-link a:hover {
            text-decoration: underline;
        }

        .error-message {
            background: rgba(239, 68, 68, 0.1);
            border: 1px solid rgba(239, 68, 68, 0.3);
            color: #fca5a5;
            padding: 12px 16px;
            border-radius: 10px;
            margin-bottom: 20px;
            font-size: 14px;
            text-align: center;
        }

        .success-message {
            background: rgba(34, 197, 94, 0.1);
            border: 1px solid rgba(34, 197, 94, 0.3);
            color: #86efac;
            padding: 12px 16px;
            border-radius: 10px;
            margin-bottom: 20px;
            font-size: 14px;
            text-align: center;
        }

        /* Background Effects */
        .bg-pattern {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1;
        }

        .floating-dot {
            position: absolute;
            width: 4px;
            height: 4px;
            background: rgba(74, 158, 255, 0.6);
            border-radius: 50%;
            animation: float 6s ease-in-out infinite;
        }

        .floating-dot:nth-child(1) {
            top: 20%;
            left: 10%;
            animation-delay: -0.5s;
        }

        .floating-dot:nth-child(2) {
            top: 60%;
            left: 85%;
            animation-delay: -2s;
        }

        .floating-dot:nth-child(3) {
            top: 40%;
            left: 75%;
            animation-delay: -3.5s;
        }

        .floating-dot:nth-child(4) {
            top: 80%;
            left: 20%;
            animation-delay: -1s;
        }

        .floating-dot:nth-child(5) {
            top: 25%;
            left: 60%;
            animation-delay: -4s;
        }

        @keyframes float {
            0%, 100% {
                transform: translateY(0px);
                opacity: 0.6;
            }
            50% {
                transform: translateY(-20px);
                opacity: 1;
            }
        }

        /* Responsive */
        @media (max-width: 768px) {
            .header {
                padding: 20px;
            }

            .auth-container {
                padding: 40px 30px;
                margin: 20px;
            }
        }

        .hidden {
            display: none;
        }

        .error-message {
            background: rgba(239, 68, 68, 0.1);
            border: 1px solid rgba(239, 68, 68, 0.3);
            color: #fca5a5;
            padding: 12px 16px;
            border-radius: 10px;
            margin-bottom: 20px;
            font-size: 14px;
            text-align: center;
        }

        .success-message {
            background: rgba(34, 197, 94, 0.1);
            border: 1px solid rgba(34, 197, 94, 0.3);
            color: #86efac;
            padding: 12px 16px;
            border-radius: 10px;
            margin-bottom: 20px;
            font-size: 14px;
            text-align: center;
        }

        /* Background Effects */
        .bg-pattern {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1;
        }

        .floating-dot {
            position: absolute;
            width: 4px;
            height: 4px;
            background: rgba(74, 158, 255, 0.6);
            border-radius: 50%;
            animation: float 6s ease-in-out infinite;
        }

        .floating-dot:nth-child(1) {
            top: 20%;
            left: 10%;
            animation-delay: -0.5s;
        }

        .floating-dot:nth-child(2) {
            top: 60%;
            left: 85%;
            animation-delay: -2s;
        }

        .floating-dot:nth-child(3) {
            top: 40%;
            left: 75%;
            animation-delay: -3.5s;
        }

        .floating-dot:nth-child(4) {
            top: 80%;
            left: 20%;
            animation-delay: -1s;
        }

        .floating-dot:nth-child(5) {
            top: 25%;
            left: 60%;
            animation-delay: -4s;
        }

        @keyframes float {
            0%, 100% {
                transform: translateY(0px);
                opacity: 0.6;
            }
            50% {
                transform: translateY(-20px);
                opacity: 1;
            }
        }

        /* Responsive */
        @media (max-width: 768px) {
            .header {
                padding: 20px;
            }

            .auth-container {
                padding: 40px 30px;
                margin: 20px;
            }

            .social-login {
                flex-direction: column;
            }
        }

        .hidden {
            display: none;
        }
    
        /* Header controls */
.header-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.control-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #a0a9c0;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.control-btn:hover {
    background: rgba(74, 158, 255, 0.1);
    border-color: #4a9eff;
    color: #4a9eff;
}

/* Language Selector */
.language-selector {
    position: relative;
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 8px 0;
    min-width: 180px;
    display: none;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    z-index: 1000;
}

.language-dropdown.show {
    display: block;
}

.language-option {
    padding: 8px 16px;
    cursor: pointer;
    font-size: 12px;
    color: #a0a9c0;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.language-option:hover {
    background: rgba(74, 158, 255, 0.1);
    color: #4a9eff;
}

.language-option.active {
    background: rgba(74, 158, 255, 0.2);
    color: #4a9eff;
}

/* Light theme */
[data-theme="light"] body {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #f1f5f9 100%);
    color: #1e293b;
}

[data-theme="light"] .auth-container {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: #1e293b;
}

[data-theme="light"] .auth-title {
    background: linear-gradient(135deg, #1e293b 0%, #64748b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="light"] .auth-subtitle {
    color: #64748b;
}

[data-theme="light"] .form-input {
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: #1e293b;
}

[data-theme="light"] .form-label {
    color: #64748b;
}

[data-theme="light"] .control-btn {
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: #64748b;
}

[data-theme="light"] .language-dropdown {
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .language-option {
    color: #64748b;
}

[data-theme="light"] .back-btn {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #3b82f6;
}

[data-theme="light"] .floating-dot {
    background: rgba(59, 130, 246, 0.6);
}

/* Responsive */
@media (max-width: 768px) {
    .header-controls {
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .control-btn span {
        display: none;
    }
}

/* Tema claro - agregar estas reglas al final de login.css */

[data-theme="light"] .bg-pattern {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #f1f5f9 100%);
}

[data-theme="light"] .header {
    background: rgba(248, 250, 252, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .logo {
    color: #3b82f6;
}

[data-theme="light"] .tab-btn {
    color: #64748b;
}

[data-theme="light"] .tab-btn.active {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
}

[data-theme="light"] .submit-btn {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.3);
}

[data-theme="light"] .submit-btn:hover:not(:disabled) {
    box-shadow: 0 12px 40px rgba(59, 130, 246, 0.4);
}

[data-theme="light"] .forgot-link a {
    color: #3b82f6;
}

[data-theme="light"] .auth-tabs {
    background: rgba(0, 0, 0, 0.05);
}