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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    overflow: hidden;
    width: 100%;
    max-width: 900px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 600px;
}

.login-left {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.login-left::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    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="20" cy="20" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="80" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="60" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="70" cy="30" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    top: -50%;
    left: -50%;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.logo-section {
    position: relative;
    z-index: 2;
}

.logo {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.brand-name {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #fff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-tagline {
    font-size: 1.2rem;
    opacity: 0.9;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.features-list {
    list-style: none;
}

.features-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 1rem;
    opacity: 0.9;
}

.feature-icon {
    font-size: 1.2rem;
}

.login-right {
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-title {
    font-size: 2rem;
    font-weight: bold;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: #7f8c8d;
    font-size: 1rem;
}

.error-message, .success-message {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    display: none;
}

.error-message {
    background: #fee;
    color: #e74c3c;
    border: 1px solid #f5b7b1;
}

.success-message {
    background: #e8f5e8;
    color: #27ae60;
    border: 1px solid #a9dfbf;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    color: #2c3e50;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f8fafc;
}

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

.form-input::placeholder {
    color: #a0aec0;
}

.password-toggle {
    position: relative;
}

.toggle-btn {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #7f8c8d;
    cursor: pointer;
    font-size: 1.1rem;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox {
    width: 18px;
    height: 18px;
}

.checkbox-label {
    color: #7f8c8d;
    font-size: 0.9rem;
}

.forgot-link {
    color: #667eea;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.forgot-link:hover {
    color: #5a67d8;
}

.login-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.login-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.login-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.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:not(:disabled)::before {
    left: 100%;
}

.demo-section {
    margin-top: 2rem;
    padding: 1rem;
    background: #f0f9ff;
    border-radius: 8px;
    border-left: 4px solid #3b82f6;
}

.demo-title {
    font-weight: 600;
    color: #1e40af;
    margin-bottom: 0.5rem;
}

.demo-accounts {
    font-size: 0.85rem;
    color: #1e40af;
}

.demo-account {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.25rem;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: background 0.2s ease;
}

.demo-account:hover {
    background: rgba(59, 130, 246, 0.1);
}

@media (max-width: 768px) {
    .login-container {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
    
    .login-left {
        padding: 2rem;
        text-align: center;
    }
    
    .brand-name {
        font-size: 2rem;
    }
    
    .login-right {
        padding: 2rem;
    }
}