/* Modern Design Overrides for PSU Trang Certificate System */
@import url('https://fonts.googleapis.com/css2?family=Kanit:wght@300;400;500;700&family=Prompt:wght@300;400;500;600&display=swap');

:root {
    --primary-color: #002D5B;
    /* PSU Navy Blue */
    --secondary-color: #D4AF37;
    /* PSU Gold */
    --accent-color: #D4AF37;
    /* Gold */
    --bg-light: #F8F9FA;
    --text-dark: #333333;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --font-main: 'Prompt', sans-serif;
    --font-heading: 'Kanit', sans-serif;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-light);
    color: var(--text-dark);
}

h1,
h2,
h3,
h4,
h5,
h6,
.h1,
.h2,
.h3,
.h4,
.h5,
.h6 {
    font-family: var(--font-heading);
    font-weight: 600;
}

/* Navbar */
#mainNav {
    background-color: #fff !important;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

#mainNav .navbar-brand {
    color: var(--primary-color) !important;
    font-weight: 700;
    font-size: 1.5rem;
}

#mainNav .navbar-nav .nav-item .nav-link {
    color: var(--primary-color) !important;
    font-weight: 500;
    font-size: 1rem;
    padding: 0.5rem 1rem;
}

#mainNav .navbar-nav .nav-item .nav-link:hover,
#mainNav .navbar-nav .nav-item .nav-link.active {
    color: var(--secondary-color) !important;
}

#mainNav .navbar-toggler {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
}

/* Masthead (Hero) */
header.masthead {
    background: linear-gradient(135deg, var(--primary-color) 0%, #004e92 100%);
    padding-top: calc(8rem + 50px) !important;
    padding-bottom: 6rem !important;
    position: relative;
    overflow: hidden;
    color: white;
}

header.masthead::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.masthead-heading {
    font-size: 3.5rem !important;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    margin-bottom: 1.5rem !important;
}

.masthead-subheading {
    font-size: 1.75rem !important;
    opacity: 0.9;
}

/* Dividers */
.divider-custom {
    margin: 1.5rem 0 2rem;
}

.divider-custom .divider-custom-line {
    background-color: var(--secondary-color);
    height: 3px;
    border-radius: 2px;
}

.divider-light .divider-custom-line {
    background-color: white;
}

.divider-custom .divider-custom-icon {
    color: var(--secondary-color);
    margin: 0 1rem;
    font-size: 1.5rem;
}

.divider-light .divider-custom-icon {
    color: white;
}

/* Card Styling */
.card {
    border: none !important;
    border-radius: 15px !important;
    box-shadow: var(--card-shadow);
    background: white;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
} */

.card-header {
    background-color: white !important;
    border-bottom: 2px solid var(--bg-light);
    font-weight: 600;
    color: var(--primary-color);
}

.card-body {
    padding: 2.5rem !important;
}

/* Form Styling */
.form-group label,
.text-xs {
    color: var(--primary-color) !important;
    font-size: 1rem !important;
    margin-bottom: 0.5rem;
    font-weight: 500 !important;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-control {
    border-radius: 10px !important;
    border: 2px solid #e9ecef !important;
    padding: 0.75rem 1.25rem !important;
    font-size: 1rem !important;
    color: #495057;
    transition: border-color 0.2s;
}

.form-control:focus {
    border-color: var(--secondary-color) !important;
    box-shadow: 0 0 0 0.2rem rgba(0, 166, 156, 0.25) !important;
}

select.form-control {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 16px 12px;
    appearance: none;
}

/* Table Styling */
#dataTable {
    width: 100% !important;
    border-collapse: separate;
    border-spacing: 0;
    border-radius: 12px;
    overflow: hidden;
}

#dataTable thead th {
    background-color: var(--primary-color) !important;
    color: white !important;
    border: none;
    padding: 1rem;
    font-weight: 500;
}

#dataTable tbody tr {
    background-color: white;
    transition: background-color 0.2s;
}

#dataTable tbody tr:hover {
    background-color: #f1f8ff;
}

#dataTable tbody td {
    border-bottom: 1px solid #eee;
    padding: 1rem;
    vertical-align: middle;
}

#dataTable tfoot th {
    background-color: #f8f9fa;
    color: var(--text-dark);
    font-weight: 600;
}

.page-item.active .page-link {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
}

.page-link {
    color: var(--primary-color) !important;
}

/* Buttons */
.btn-primary {
    background-color: var(--secondary-color) !important;
    border-color: var(--secondary-color) !important;
    color: var(--primary-color) !important;
    border-radius: 50px !important;
    padding: 0.75rem 2rem;
    font-weight: 700;
    transition: all 0.3s;
}

.btn-primary:hover {
    background-color: #bfa030 !important;
    color: white !important;
    transform: translateY(-2px);
}

/* Footer */
footer.footer {
    background-color: #1a252f;
    padding-top: 5rem !important;
    padding-bottom: 5rem !important;
    color: white;
}

.footer h4 {
    color: var(--secondary-color);
    margin-bottom: 1.5rem !important;
}

.btn-social {
    border-radius: 50% !important;
    width: 3.25rem;
    height: 3.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin: 0 0.5rem;
    border: 2px solid white;
    transition: all 0.3s;
}

.btn-social:hover {
    background-color: white;
    color: var(--primary-color);
    transform: scale(1.1);
}

.copyright {
    background-color: #121a21;
    padding: 1.5rem 0 !important;
    font-size: 0.9rem;
}