/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Marcellus&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Teachers:ital,wght@0,400..800;1,400..800&display=swap');

/* --- CSS Custom Properties (Variables) --- */
:root {
    --font-heading: 'Marcellus', serif;
    --font-body: 'Teachers', sans-serif; /* Corrected to 'Teachers' */
    --color-primary: #3894e0;
    --color-accent: #f8955b;
    --color-text: #363636;
    --color-light-bg: #ffffff;
    --color-border: #dee2e6;
}

/* --- General Body and Font Styles --- */
body {
    background-color: #f4f7f6;
    font-family: var(--font-body);
    color: var(--color-text);
    font-size: 17px;
}

/* --- Headings --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-primary);
}

/* --- App Header & Logo --- */
.app-header {
    text-align: center;
    padding: 2rem 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2rem;
    background-color: var(--color-light-bg);
}
.app-header img {
    max-width: 220px;
}

/* --- Modern Card Style --- */
.card {
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.07);
    background-color: var(--color-light-bg);
}
.card-header {
    background-color: #fff;
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}
.card-body {
    padding: 2rem;
}
.card-footer {
    background-color: #f8f9fa;
    border-top: 1px solid var(--color-border);
}

/* --- Buttons --- */
.btn {
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-body);
    font-weight: 600;
    transition: all 0.2s ease-in-out;
    border: none;
    letter-spacing: 0.5px;
}
.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}
.btn-primary { background-color: var(--color-primary); }
.btn-accent { background-color: var(--color-accent); color: #fff; }
.btn-secondary { background-color: #6c757d; }
.btn-info { background-color: #17a2b8; }
.btn-danger { background-color: #dc3545; }
.btn-success { background-color: #198754; }

/* --- Form Elements --- */
.form-label {
    font-family: var(--font-body);
    font-weight: 600;
    color: #495057;
}
.form-control, .form-select {
    font-family: inherit;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    border: 1px solid #ced4da;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-control:focus, .form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 0.25rem rgba(56, 148, 224, 0.25);
}

/* --- Table Styling --- */
.table thead th {
    font-family: var(--font-heading);
    background-color: var(--color-primary);
    color: #fff;
    border: none;
    padding: 1rem;
    font-size: 1.1rem;
}
.table tbody td {
    padding: 1rem;
    vertical-align: middle;
}