/*
 * Modern CSS Design (2025)
 * Theme: "Clean Teal"
 */

/* === Variables & Reset === */
:root {
    --primary-color: #0d9488;
    /* Modern Teal */
    --primary-dark: #0f766e;
    --primary-light: #ccfbf1;
    --secondary-color: #334155;
    /* Slate Gray */
    --accent-color: #f59e0b;
    /* Amber */

    --bg-body: #f3f4f6;
    /* Cool Gray */
    --bg-card: #ffffff;

    --text-main: #1f2937;
    --text-muted: #6b7280;

    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    --font-primary: 'Kanit', sans-serif;
    --radius-md: 0.75rem;
    /* 12px */
    --radius-lg: 1rem;
    /* 16px */
    --radius-pill: 9999px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    color: var(--secondary-color);
    letter-spacing: -0.025em;
}

/* === Navbar === */
.navbar {
    background: #ffffff !important;
    box-shadow: var(--shadow-md);
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand i {
    background: var(--primary-light);
    color: var(--primary-color);
    padding: 0.5rem;
    border-radius: var(--radius-md);
    font-size: 1.2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-muted) !important;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-md);
    transition: all 0.2s;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color) !important;
    background-color: var(--primary-light);
}

/* === Cards & Blocks === */
.department-block,
.card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.department-block:hover,
.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1rem;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--primary-dark);
}

/* === Search Bar === */
input[type="text"].form-control,
textarea.form-control,
select.form-select {
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="text"].form-control:focus,
textarea.form-control:focus,
select.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--primary-light);
}

/* === Buttons === */
.btn {
    border-radius: var(--radius-md);
    padding: 0.6rem 1.25rem;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 4px 6px rgba(13, 148, 136, 0.3);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: 0 6px 8px rgba(13, 148, 136, 0.4);
    transform: translateY(-1px);
}

.btn-success {
    background-color: #10b981;
    border: none;
    box-shadow: 0 4px 6px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    background-color: #059669;
    transform: translateY(-1px);
}

/* === Tabs (Modern Pills) === */
.nav-tabs {
    border-bottom: none;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.nav-tabs .nav-link {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-pill);
    color: var(--text-muted);
    font-weight: 500;
    background: #fff;
    padding: 0.5rem 1.25rem;
}

.nav-tabs .nav-link.active {
    background-color: var(--secondary-color);
    color: #fff !important;
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-sm);
}

/* === Accordion (Detailed Items) === */
.accordion-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md) !important;
    margin-bottom: 0.75rem;
    overflow: hidden;
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.accordion-button {
    background-color: #fff;
    color: var(--text-main);
    font-weight: 500;
    padding: 1.25rem;
    border-radius: var(--radius-md) !important;
}

.accordion-button:not(.collapsed) {
    background-color: var(--primary-light);
    color: var(--primary-dark);
    box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.05);
}

.accordion-button:focus {
    box-shadow: none;
    border-color: transparent;
}

.accordion-button::after {
    background-size: 1rem;
    opacity: 0.5;
}

.accordion-button:not(.collapsed)::after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%230f766e'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

/* Overdue Styling */
.header-overdue,
.header-overdue:not(.collapsed) {
    background-color: #fee2e2 !important;
    /* Soft Red */
    color: #b91c1c !important;
    /* Dark Red */
    border: 1px solid #fecaca;
}

/* === Badges & Icons === */
.badge {
    padding: 0.5em 0.8em;
    font-weight: 500;
    border-radius: var(--radius-pill);
    letter-spacing: 0.02em;
}

.badge.bg-warning {
    background-color: #fef3c7 !important;
    /* Amber 100 */
    color: #92400e !important;
    /* Amber 800 */
    border: 1px solid #fde68a;
}

.badge.bg-success {
    background-color: #d1fae5 !important;
    /* Emerald 100 */
    color: #065f46 !important;
    /* Emerald 800 */
    border: 1px solid #a7f3d0;
}

.text-danger {
    color: #ef4444 !important;
}

/* === Modal === */
.modal-content {
    border-radius: var(--radius-lg);
    border: none;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    background-color: #f9fafb;
    border-top-left-radius: var(--radius-lg);
    border-top-right-radius: var(--radius-lg);
}

.list-group-item {
    cursor: pointer;
    transition: background 0.1s;
}

.list-group-item:hover {
    background-color: var(--primary-light);
}

/* === Custom Layout Tweaks === */
.container {
    max-width: 1140px;
}

@media (max-width: 768px) {
    .navbar-brand {
        font-size: 1.25rem;
    }

    .department-block {
        padding: 1rem;
    }
}

.hover-scale {
    transition: transform 0.2s ease-in-out;
}

.hover-scale:hover {
    transform: scale(1.05);
}