:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-gradient: linear-gradient(135deg, #28a745, #20c997);
    --warning-gradient: linear-gradient(135deg, #ffc107, #fd7e14);
    --danger-gradient: linear-gradient(135deg, #dc3545, #e74c3c);
    --info-gradient: linear-gradient(135deg, #17a2b8, #6f42c1);
    --shadow-light: 0 5px 15px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 10px 30px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 15px 40px rgba(0, 0, 0, 0.2);
    --border-radius: 15px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Raleway', sans-serif;
    line-height: 1.6;
    color: #333;
    background: var(--primary-gradient);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-20px);
    }
}

.login-container {
    position: relative;
    z-index: 2;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-heavy);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    margin: 20px;
    animation: slideInUp 0.8s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo {
    font-size: 2.5rem;
    font-weight: 800;
    color: #667eea;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.login-logo i {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.login-subtitle {
    color: #666;
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 25px;
    position: relative;
}

.form-input {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 16px;
    transition: var(--transition);
    background: white;
    position: relative;
}

.form-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

.input-icon {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #667eea;
    font-size: 18px;
}

.form-input:focus+.input-icon {
    animation: bounce 0.6s ease;
}

@keyframes bounce {
    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(-50%);
    }

    40% {
        transform: translateY(-60%);
    }

    60% {
        transform: translateY(-55%);
    }
}

.error-message {
    color: #dc3545;
    font-size: 14px;
    margin-top: 5px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 25px;
}

.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid #667eea;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    background: white;
}

.checkbox-custom:hover {
    background: rgba(102, 126, 234, 0.1);
}

.checkbox-custom.checked {
    background: var(--primary-gradient);
    border-color: #667eea;
}

.checkbox-custom.checked::after {
    content: '✓';
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.btn-login {
    width: 100%;
    padding: 15px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-login:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

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

.social-login-divider {
    text-align: center;
    margin: 25px 0;
    position: relative;
}

.social-login-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #e9ecef;
}

.social-login-divider span {
    background: white;
    padding: 0 15px;
    color: #666;
    font-size: 14px;
}

.social-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

.btn-social {
    flex: 1;
    padding: 12px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    background: white;
    color: #333;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
}

.btn-social:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
    text-decoration: none;
}

.btn-facebook {
    border-color: #1877f2;
    color: #1877f2;
}

.btn-facebook:hover {
    background: #1877f2;
    color: white;
}

.btn-google {
    border-color: #db4437;
    color: #db4437;
}

.btn-google:hover {
    background: #db4437;
    color: white;
}

.login-links {
    text-align: center;
    margin-top: 25px;
}

.login-links a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: inline-block;
    margin: 5px 10px;
}

.login-links a:hover {
    color: #5a6fd8;
    transform: translateY(-2px);
}

.back-home {
    position: absolute;
    top: 20px;
    left: 20px;
    color: white;
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    z-index: 3;
}

.back-home:hover {
    color: rgba(255, 255, 255, 0.8);
    transform: translateX(-5px);
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 1;
}

.floating-element {
    position: absolute;
    color: rgba(255, 255, 255, 0.1);
    font-size: 24px;
    animation: floating 6s ease-in-out infinite;
}

.floating-element:nth-child(1) {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.floating-element:nth-child(2) {
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}

.floating-element:nth-child(3) {
    bottom: 30%;
    left: 20%;
    animation-delay: 4s;
}

@keyframes floating {
    0%,
    100% {
        transform: translateY(0px) rotate(0deg);
    }

    50% {
        transform: translateY(-20px) rotate(10deg);
    }
}

/* Responsive */
@media (max-width: 480px) {
    .login-container {
        margin: 10px;
        padding: 30px 20px;
    }

    .login-logo {
        font-size: 2rem;
    }

    .back-home {
        top: 10px;
        left: 10px;
        font-size: 14px;
    }
}