/* ============================================================
   UI Layer — aksesibilitas, konsistensi, dan polesan antarmuka
   Dimuat terakhir agar dapat menyempurnakan tema dasar.
   ============================================================ */

:root {
    /* Token desain terpadu */
    --ui-radius-sm: 8px;
    --ui-radius: 12px;
    --ui-radius-lg: 16px;
    --ui-shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
    --ui-shadow: 0 4px 14px rgba(15, 23, 42, .07);
    --ui-shadow-lg: 0 10px 30px rgba(15, 23, 42, .12);
    --ui-border: #e2e8f0;
    --ui-muted: #64748b;
    --ui-focus: #0d9488;
    --ui-transition: .18s ease;
}

/* ------------------------------------------------------------
   1. Aksesibilitas keyboard
   ------------------------------------------------------------ */

/* Tautan "lewati ke konten" — hanya tampil saat difokus keyboard */
.skip-link {
    position: absolute;
    left: 50%;
    top: -100px;
    transform: translateX(-50%);
    z-index: 2000;
    background: #0f172a;
    color: #fff;
    padding: .7rem 1.2rem;
    border-radius: 0 0 var(--ui-radius) var(--ui-radius);
    font-weight: 700;
    font-size: .9rem;
    text-decoration: none;
    box-shadow: var(--ui-shadow-lg);
    transition: top var(--ui-transition);
}
.skip-link:focus,
.skip-link:focus-visible {
    top: 0;
    color: #fff;
    outline: 3px solid #facc15;
    outline-offset: 2px;
}

/* Indikator fokus yang jelas & konsisten untuk semua elemen interaktif */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible,
.form-check-input:focus-visible,
.btn:focus-visible,
.nav-link:focus-visible,
.accordion-button:focus-visible,
.dropdown-item:focus-visible,
.page-link:focus-visible {
    outline: 3px solid var(--ui-focus);
    outline-offset: 2px;
    border-radius: var(--ui-radius-sm);
    box-shadow: none;
}

/* Jangan tampilkan outline ganda pada input yang sudah punya ring Bootstrap */
.form-control:focus-visible,
.form-select:focus-visible {
    outline: 2px solid var(--ui-focus);
    outline-offset: 1px;
}

/* Elemen dekoratif (ikon dalam tombol berteks) tidak dibacakan */
.bi[aria-hidden="true"] { pointer-events: none; }

/* ------------------------------------------------------------
   2. Keadaan tombol saat memproses (loading)
   ------------------------------------------------------------ */
.btn.is-loading {
    pointer-events: none;
    opacity: .78;
    position: relative;
    padding-right: 2.4rem;
}
.btn.is-loading::after {
    content: "";
    position: absolute;
    right: .85rem;
    top: 50%;
    width: 1rem;
    height: 1rem;
    margin-top: -.5rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: ui-spin .6s linear infinite;
}
@keyframes ui-spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
    .btn.is-loading::after { animation-duration: 2s; }
}

/* ------------------------------------------------------------
   3. Empty state (tampilan saat data kosong)
   ------------------------------------------------------------ */
.empty-state {
    text-align: center;
    padding: 2.5rem 1.25rem;
    color: var(--ui-muted);
}
.empty-state .empty-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: #f1f5f9;
    color: #94a3b8;
    font-size: 1.7rem;
    margin-bottom: .85rem;
}
.empty-state h6 {
    font-weight: 700;
    color: #334155;
    margin-bottom: .35rem;
}
.empty-state p {
    font-size: .9rem;
    margin-bottom: .9rem;
    max-width: 420px;
    margin-inline: auto;
}

/* ------------------------------------------------------------
   4. Tabel yang nyaman di layar kecil
   ------------------------------------------------------------ */
.table-responsive { position: relative; }
.table-responsive::after {
    /* petunjuk halus bahwa tabel dapat digeser (hanya layar kecil) */
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 14px;
    pointer-events: none;
    background: linear-gradient(to left, rgba(15, 23, 42, .07), transparent);
    opacity: 0;
    transition: opacity var(--ui-transition);
}
@media (max-width: 767px) {
    .table-responsive::after { opacity: 1; }
    .table-responsive table { min-width: 640px; }
}

/* Baris tabel lebih tegas saat hover pada perangkat sentuh */
@media (hover: none) {
    .table-hover > tbody > tr:active { background: #f8fafc; }
}

/* ------------------------------------------------------------
   5. Konsistensi komponen
   ------------------------------------------------------------ */
.card {
    border-radius: var(--ui-radius) !important;
    box-shadow: var(--ui-shadow) !important;
}
.btn { border-radius: var(--ui-radius-sm); transition: transform var(--ui-transition), box-shadow var(--ui-transition), opacity var(--ui-transition); }
.btn:not(:disabled):active { transform: translateY(1px); }
.btn-sm { border-radius: 7px; }
.form-control, .form-select, .input-group-text { border-radius: var(--ui-radius-sm); }
.badge { font-weight: 700; letter-spacing: .2px; }
.alert { border-radius: var(--ui-radius); border: none; box-shadow: var(--ui-shadow-sm); }

/* Label form yang lebih jelas dibaca */
.form-label { font-weight: 600; color: #334155; }
.form-text { color: var(--ui-muted); }

/* Nomor bantuan pada field wajib */
.form-label .req { color: #dc2626; margin-left: .15rem; }

/* Judul halaman konsisten */
h4.fw-bold, .page-title {
    letter-spacing: -.2px;
}

/* Tautan menu sidebar yang sedang aktif juga ditandai untuk pembaca layar */
.sidebar-menu a[aria-current="page"] { font-weight: 700; }

/* Navigasi publik aktif */
.navbar .nav-link.active { font-weight: 700; }

/* ------------------------------------------------------------
   6. Detail kecil yang membuat tampilan terasa lebih rapi
   ------------------------------------------------------------ */
/* Scrollbar halus (WebKit) */
.sidebar-menu::-webkit-scrollbar,
.table-responsive::-webkit-scrollbar { width: 8px; height: 8px; }
.sidebar-menu::-webkit-scrollbar-thumb,
.table-responsive::-webkit-scrollbar-thumb {
    background: rgba(100, 116, 139, .35);
    border-radius: 8px;
}

/* Teks kode (nomor pendaftaran) lebih mudah dibaca & disalin */
code, .text-code {
    background: #f1f5f9;
    color: #0f172a;
    padding: .12em .45em;
    border-radius: 5px;
    font-weight: 600;
    font-size: .9em;
}

/* Angka statistik tidak "melompat" saat berubah */
.stat-card h5, .stat-value { font-variant-numeric: tabular-nums; }

/* Fokus pada kartu yang dapat diklik */
a.card, .card[role="link"] { transition: transform var(--ui-transition), box-shadow var(--ui-transition); }
a.card:hover, .card[role="link"]:hover { transform: translateY(-2px); box-shadow: var(--ui-shadow-lg) !important; }

/* Sembunyikan elemen hanya dari pembaca layar */
.visually-hidden-focusable:not(:focus):not(:focus-within) {
    position: absolute !important;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}