:root {
    --primary: #3b82f6;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --bg: #0f172a;
    --card-bg: #1e293b;
    --text-main: #f1f5f9;
    --text-sub: #94a3b8;
    --border: #334155;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.login-header h1 {
    font-size: 1.75rem;
    color: var(--text-main);
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-sub);
    font-size: 0.95rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group label i {
    color: var(--primary);
}

.form-group input {
    background: var(--bg);
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text-main);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.btn-login {
    background: linear-gradient(135deg, var(--primary) 0%, #2563eb 100%);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 14px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 8px;
    transition: all 0.3s ease;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

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

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login-links {
    display: flex;
    justify-content: space-between;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.login-links a {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: color 0.2s;
}

.login-links a:hover {
    color: #60a5fa;
}

.message {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    display: none;
}

.message.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

.message.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.message.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 30px 24px;
    }
    
    .login-header h1 {
        font-size: 1.5rem;
    }
    
    .login-links {
        flex-direction: column;
        gap: 12px;
        align-items: center;
    }
}