@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');

:root {
    --primary-color: #4A90E2;
    --secondary-color: #50E3C2;
    --background-color: #F4F7F6;
    --surface-color: #FFFFFF;
    --text-color: #333333;
    --light-text-color: #FFFFFF;
    --border-radius: 0.5rem;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-container {
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(rgba(74, 144, 226, 0.8), rgba(80, 227, 194, 0.8)), url('https://picsum.photos/seed/schoolhero/1600/900') no-repeat center center;
    background-size: cover;
}

.login-card {
    background: var(--surface-color);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
    text-align: center;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-card img.logo {
    width: 150px;
    margin-bottom: 1rem;
}

.login-card h1 {
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: var(--text-color);
}

.login-card p.tagline {
    margin-bottom: 2rem;
    color: #666;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-control, .form-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: var(--border-radius);
    box-sizing: border-box;
    transition: border-color 0.3s;
}

.form-control:focus, .form-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-login {
    width: 100%;
    padding: 0.85rem;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--primary-color);
    color: var(--light-text-color);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.btn-login:hover {
    background-color: #357ABD;
    transform: translateY(-2px);
}

.footer {
    position: absolute;
    bottom: 1rem;
    color: var(--light-text-color);
    text-align: center;
    width: 100%;
    font-size: 0.9rem;
}

#error-message {
    color: #721c24; /* Dark red text */
    background-color: #f8d7da; /* Light red background */
    border: 1px solid #f5c6cb; /* Red border */
    padding: 0.75rem 1.25rem;
    margin-bottom: 1rem;
    border-radius: var(--border-radius);
    display: none; /* Hidden by default */
    text-align: center;
    font-size: 0.9rem;
}