:root {
    --primary-color: #1e293b;
    --secondary-color: #3b82f6;
    --accent-color: #10b981;
    --bg-color: #f1f5f9;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --error-color: #ef4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: linear-gradient(135deg, #e0f2fe 0%, #f1f5f9 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.auth-card {
    background: #ffffff;
    width: 100%;
    max-width: 420px;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

.auth-logo {
    font-size: 32px;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.auth-header h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--text-muted);
    font-size: 14px;
}

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-main);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.2s;
    outline: none;
}

.form-input:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input.is-invalid {
    border-color: var(--error-color);
}

.error-message {
    font-size: 12px;
    color: var(--error-color);
    margin-top: 5px;
}

.options-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    cursor: pointer;
}

.forgot-link {
    font-size: 14px;
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
}

.btn-login {
    width: 100%;
    padding: 12px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-login:hover {
    background-color: #2563eb;
}

.auth-footer {
    text-align: center;
    margin-top: 30px;
    font-size: 14px;
    color: var(--text-muted);
}

.auth-footer a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
}

/* Lab Theme Background Pattern (Optional/Subtle) */
.bg-svg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.05;
    pointer-events: none;
}