/* SDÜ Bilgi Merkezi teması (Bootstrap 5 üzerine) */

/* Renk paletleri: w3.sdu.edu.tr temalarıyla aynı tonlar. Değerler "r, g, b" biçiminde (Bootstrap rgba() ile uyumlu).
   Kontrast: 600/700 tonları beyaz metinle ve beyaz zeminde, 200 tonu koyu zeminde ≥ 4.5:1 (WCAG 2.2 AA).
   Palet anahtarları Pages/Shared/_A11yPanel.cshtml ve js/prefs.js ile aynı olmalıdır. */
:root, [data-palette="kirmizi"] {
    --pal-50: 254, 244, 244; --pal-100: 252, 228, 229; --pal-200: 226, 166, 158;
    --pal-600: 197, 30, 42; --pal-700: 165, 18, 31; --pal-800: 132, 16, 26; --pal-900: 98, 16, 22; --pal-hero: 85, 7, 13;
    --pal-warm-50: 250, 249, 247; --pal-warm-300: 218, 214, 207; --pal-warm-500: 114, 108, 101; --pal-warm-900: 35, 32, 29;
    --pal-ink-bg: 28, 24, 26; --pal-ink-surface: 39, 33, 36; --pal-ink-raised: 51, 43, 47; --pal-ink-line: 70, 60, 65;
    --pal-dark-text: 242, 233, 233; --pal-dark-muted: 189, 179, 182;
}
[data-palette="davraz"] {
    --pal-50: 240, 245, 252; --pal-100: 224, 234, 248; --pal-200: 186, 205, 235;
    --pal-600: 47, 73, 118; --pal-700: 36, 58, 96; --pal-800: 27, 44, 74; --pal-900: 19, 32, 55; --pal-hero: 10, 21, 38;
    --pal-warm-50: 248, 250, 252; --pal-warm-300: 205, 216, 223; --pal-warm-500: 89, 104, 114; --pal-warm-900: 22, 31, 37;
    --pal-ink-bg: 15, 21, 26; --pal-ink-surface: 22, 30, 37; --pal-ink-raised: 31, 42, 51; --pal-ink-line: 49, 63, 74;
    --pal-dark-text: 232, 237, 240; --pal-dark-muted: 167, 180, 188;
}
[data-palette="elma"] {
    --pal-50: 242, 249, 238; --pal-100: 229, 242, 220; --pal-200: 203, 228, 184;
    --pal-600: 70, 115, 38; --pal-700: 55, 91, 29; --pal-800: 43, 71, 23; --pal-900: 32, 53, 18; --pal-hero: 22, 37, 12;
    --pal-warm-50: 249, 251, 246; --pal-warm-300: 212, 219, 202; --pal-warm-500: 92, 101, 84; --pal-warm-900: 27, 32, 22;
    --pal-ink-bg: 18, 22, 15; --pal-ink-surface: 26, 31, 21; --pal-ink-raised: 36, 43, 29; --pal-ink-line: 55, 64, 45;
    --pal-dark-text: 234, 239, 228; --pal-dark-muted: 172, 182, 160;
}
[data-palette="gol"] {
    --pal-50: 239, 247, 250; --pal-100: 222, 238, 244; --pal-200: 188, 221, 233;
    --pal-600: 20, 96, 128; --pal-700: 15, 76, 99; --pal-800: 12, 60, 78; --pal-900: 9, 46, 60; --pal-hero: 5, 30, 40;
    --pal-warm-50: 247, 250, 251; --pal-warm-300: 207, 219, 222; --pal-warm-500: 88, 106, 112; --pal-warm-900: 21, 32, 35;
    --pal-ink-bg: 15, 22, 25; --pal-ink-surface: 22, 32, 38; --pal-ink-raised: 32, 44, 51; --pal-ink-line: 51, 65, 72;
    --pal-dark-text: 232, 237, 238; --pal-dark-muted: 169, 181, 185;
}
[data-palette="gul"] {
    --pal-50: 251, 243, 245; --pal-100: 246, 228, 233; --pal-200: 234, 195, 206;
    --pal-600: 143, 58, 90; --pal-700: 115, 44, 72; --pal-800: 91, 34, 57; --pal-900: 69, 25, 43; --pal-hero: 46, 16, 28;
    --pal-warm-50: 251, 248, 247; --pal-warm-300: 223, 209, 208; --pal-warm-500: 95, 84, 87; --pal-warm-900: 32, 26, 28;
    --pal-ink-bg: 25, 17, 20; --pal-ink-surface: 34, 24, 28; --pal-ink-raised: 46, 33, 38; --pal-ink-line: 66, 49, 56;
    --pal-dark-text: 239, 231, 234; --pal-dark-muted: 184, 171, 175;
}
[data-palette="lavanta"] {
    --pal-50: 245, 244, 249; --pal-100: 234, 231, 243; --pal-200: 211, 206, 231;
    --pal-600: 86, 76, 134; --pal-700: 69, 61, 108; --pal-800: 54, 48, 82; --pal-900: 41, 36, 62; --pal-hero: 26, 23, 40;
    --pal-warm-50: 250, 249, 251; --pal-warm-300: 217, 212, 223; --pal-warm-500: 95, 89, 102; --pal-warm-900: 30, 27, 34;
    --pal-ink-bg: 22, 20, 28; --pal-ink-surface: 31, 28, 38; --pal-ink-raised: 42, 38, 52; --pal-ink-line: 62, 57, 73;
    --pal-dark-text: 236, 234, 239; --pal-dark-muted: 176, 170, 184;
}

/* Anlamsal renkler: bileşenler yalnızca bunları kullanır; tema/kontrast blokları bunları yeniden tanımlar. */
:root {
    --sdu-red: rgb(var(--pal-600));          /* marka zemini: menü, birincil düğme */
    --sdu-red-dark: rgb(var(--pal-700));
    --sdu-accent: rgb(var(--pal-700));       /* zemin üzerindeki vurgu metni ve ikonlar */
    --sdu-link-rgb: var(--pal-700);
    --sdu-link-hover-rgb: var(--pal-800);
    --sdu-hero: rgb(var(--pal-hero));
    --sdu-hero-end: rgb(var(--pal-900));
    --sdu-ink: rgb(var(--pal-warm-900));
    --sdu-muted: rgb(var(--pal-warm-500));
    --sdu-surface: rgb(var(--pal-warm-50));
    --sdu-card: #fff;
    --sdu-tint: rgb(var(--pal-50));
    --sdu-line: rgb(var(--pal-warm-300));
    --sdu-input-border: rgb(var(--pal-warm-500)); /* form alanı sınırı ≥ 3:1 (WCAG 1.4.11) */
    --sdu-star: #b45309;
    --sdu-focus: #1c4ed8;
    --sdu-focus-halo: #fff;
    --sdu-shadow: 0 1px 3px rgba(0, 0, 0, .06);

    --bs-primary: var(--sdu-red);
    --bs-primary-rgb: var(--pal-600);
    --bs-link-color: var(--sdu-accent);
    --bs-link-color-rgb: var(--sdu-link-rgb);
    --bs-link-hover-color: rgb(var(--sdu-link-hover-rgb));
    --bs-link-hover-color-rgb: var(--sdu-link-hover-rgb);
    --bs-body-color: var(--sdu-ink);
    --bs-body-bg: var(--sdu-surface);
    --bs-secondary-color: var(--sdu-muted);
    --bs-border-color: var(--sdu-line);
    --bs-font-sans-serif: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}

[data-bs-theme="dark"] {
    --sdu-accent: rgb(var(--pal-200));
    --sdu-link-rgb: var(--pal-200);
    --sdu-link-hover-rgb: var(--pal-100);
    --sdu-ink: rgb(var(--pal-dark-text));
    --sdu-muted: rgb(var(--pal-dark-muted));
    --sdu-surface: rgb(var(--pal-ink-bg));
    --sdu-card: rgb(var(--pal-ink-surface));
    --sdu-tint: rgb(var(--pal-ink-raised));
    --sdu-line: rgb(var(--pal-ink-line));
    --sdu-input-border: rgb(var(--pal-dark-muted));
    --sdu-star: #fbbf24;
    --sdu-focus: #ffbf47;
    --sdu-focus-halo: #000;
    --sdu-shadow: 0 1px 3px rgba(0, 0, 0, .5);
}

/* Yüksek kontrast: düz siyah/beyaz zemin, paletin en koyu tonları, belirgin sınırlar (WCAG AAA hedefi). */
[data-contrast="high"] {
    --sdu-red: rgb(var(--pal-800));
    --sdu-red-dark: rgb(var(--pal-900));
    --sdu-accent: rgb(var(--pal-900));
    --sdu-link-rgb: var(--pal-900);
    --sdu-link-hover-rgb: 0, 0, 0;
    --sdu-hero: #000;
    --sdu-hero-end: #000;
    --sdu-ink: #000;
    --sdu-muted: #000;
    --sdu-surface: #fff;
    --sdu-card: #fff;
    --sdu-tint: rgb(var(--pal-100));
    --sdu-line: #000;
    --sdu-input-border: #000;
    --sdu-shadow: none;
}
[data-bs-theme="dark"][data-contrast="high"] {
    --sdu-accent: #ffe14d;
    --sdu-link-rgb: 255, 225, 77;
    --sdu-link-hover-rgb: 255, 255, 255;
    --sdu-ink: #fff;
    --sdu-muted: #fff;
    --sdu-surface: #000;
    --sdu-card: #000;
    --sdu-tint: #1a1a1a;
    --sdu-line: #fff;
    --sdu-input-border: #fff;
    --sdu-star: #ffe14d;
}
[data-contrast="high"] .content-card,
[data-contrast="high"] .sidebar-card,
[data-contrast="high"] .info-tile,
[data-contrast="high"] .quick-link,
[data-contrast="high"] .site-header { border: 2px solid var(--sdu-line); }
[data-contrast="high"] .rich-content a,
[data-contrast="high"] .sidebar-item a,
[data-contrast="high"] .site-footer a { text-decoration: underline; }
[data-contrast="high"] .text-body-secondary { color: var(--sdu-ink) !important; }

body {
    background: var(--sdu-surface);
    color: var(--sdu-ink);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-main { flex: 1 0 auto; }

.btn-primary {
    --bs-btn-bg: var(--sdu-red);
    --bs-btn-border-color: var(--sdu-red);
    --bs-btn-hover-bg: var(--sdu-red-dark);
    --bs-btn-hover-border-color: var(--sdu-red-dark);
    --bs-btn-active-bg: var(--sdu-red-dark);
    --bs-btn-active-border-color: var(--sdu-red-dark);
    --bs-btn-disabled-bg: var(--sdu-red);
    --bs-btn-disabled-border-color: var(--sdu-red);
}

.btn-outline-primary {
    --bs-btn-color: var(--sdu-accent);
    --bs-btn-border-color: var(--sdu-accent);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--sdu-red);
    --bs-btn-hover-border-color: var(--sdu-red);
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: var(--sdu-red-dark);
    --bs-btn-active-border-color: var(--sdu-red-dark);
    --bs-btn-disabled-color: var(--sdu-muted);
    --bs-btn-disabled-border-color: var(--sdu-line);
}

.pagination {
    --bs-pagination-color: var(--sdu-accent);
    --bs-pagination-bg: var(--sdu-card);
    --bs-pagination-border-color: var(--sdu-line);
    --bs-pagination-hover-color: var(--sdu-accent);
    --bs-pagination-hover-bg: var(--sdu-tint);
    --bs-pagination-hover-border-color: var(--sdu-line);
    --bs-pagination-focus-color: var(--sdu-accent);
    --bs-pagination-focus-bg: var(--sdu-tint);
    --bs-pagination-active-bg: var(--sdu-red);
    --bs-pagination-active-border-color: var(--sdu-red);
    --bs-pagination-disabled-color: var(--sdu-muted);
    --bs-pagination-disabled-bg: var(--sdu-card);
    --bs-pagination-disabled-border-color: var(--sdu-line);
}

/* Form alanları: sınırlar arka plana karşı ≥ 3:1, seçili durumlar palet renginde */
.form-control, .form-select, .form-check-input { border-color: var(--sdu-input-border); }
.form-control:focus, .form-select:focus { border-color: var(--sdu-accent); box-shadow: 0 0 0 .2rem rgba(var(--pal-600), .25); }
.form-check-input:checked { background-color: var(--sdu-red); border-color: var(--sdu-red); }
.form-check-input:focus { border-color: var(--sdu-accent); box-shadow: none; }

.skip-link {
    position: absolute;
    left: 1rem;
    top: .5rem;
    z-index: 1100;
    background: var(--sdu-card);
    color: var(--sdu-accent);
    padding: .5rem 1rem;
}

/* Üst bar ve başlık */
.topbar { background: var(--sdu-hero); }
.topbar-link { color: rgba(255, 255, 255, .85); text-decoration: none; }
.topbar-link:hover { color: #fff; }
.topbar-btn { background: none; border: 0; padding: 0; }
.topbar-btn[aria-pressed="true"] { color: #fff; text-decoration: underline; text-underline-offset: 3px; }

.site-header { background: var(--sdu-card); border-bottom: 1px solid var(--sdu-line); }
.site-logo img { max-width: 100%; height: auto; }
/* Logo koyu yazılı; koyu temada okunabilmesi için beyaz zeminde gösterilir. */
[data-bs-theme="dark"] .site-logo img { background: #fff; border-radius: .5rem; padding: .25rem .5rem; }
.site-search { flex: 0 1 340px; min-width: 220px; }

.site-nav { background: var(--sdu-red); }
.site-nav .nav-link { color: rgba(255, 255, 255, .92); font-weight: 500; }
.site-nav .nav-link:hover, .site-nav .nav-link:focus { color: #fff; }
.site-nav .dropdown-menu { border-top: 3px solid var(--sdu-red-dark); border-radius: 0 0 .5rem .5rem; }
.site-nav .dropdown-item { white-space: normal; min-width: 16rem; }

/* İçerik */
.content-card {
    background: var(--sdu-card);
    border-radius: .75rem;
    padding: 1.75rem;
    box-shadow: var(--sdu-shadow);
}

.content-title {
    font-size: 1.6rem;
    font-weight: 600;
    border-bottom: 3px solid var(--sdu-red);
    padding-bottom: .5rem;
    margin-bottom: 1.25rem;
}

.rich-content img { max-width: 100%; height: auto; }
.rich-content iframe { max-width: 100%; }
.rich-content table { width: 100%; margin-bottom: 1rem; }
.rich-content table td, .rich-content table th { border: 1px solid var(--sdu-line); padding: .4rem .6rem; }

.sidebar-card {
    background: var(--sdu-card);
    border-radius: .75rem;
    padding: 1.25rem;
    box-shadow: var(--sdu-shadow);
}

.sidebar-title { font-size: 1.1rem; font-weight: 600; color: var(--sdu-accent); }
.sidebar-item { padding: .5rem 0; border-bottom: 1px solid var(--sdu-line); }
.sidebar-item:last-child { border-bottom: 0; }
.sidebar-item a { text-decoration: none; }

.quick-links { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; }
.quick-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .35rem;
    padding: 1rem .5rem;
    background: var(--sdu-card);
    border-radius: .75rem;
    text-align: center;
    text-decoration: none;
    color: var(--sdu-ink);
    box-shadow: var(--sdu-shadow);
    font-size: .9rem;
}
.quick-link i { font-size: 1.6rem; color: var(--sdu-accent); }
.quick-link:hover { background: var(--sdu-red); color: #fff; }
.quick-link:hover i { color: #fff; }

/* Ana sayfa */
/* Alan eskisinin yaklaşık iki katı yükseklikte; arama kutusu aynı boyutta kalıp dikeyde ortalanır. */
.hero-search {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 18rem;
    background: #1a1a1a;
    color: #fff;
}
@media (min-width: 768px) {
    .hero-search { min-height: 26rem; }
}
/* Dekoratif kütüphane fotoğrafı (kaynak 1280×857; bulanıklık/büyütme netliği düşürdüğü için uygulanmaz). Üstündeki nötr
   siyah katman (temadan bağımsız) saf beyaz zeminde bile beyaz sekme yazısı için ≥ 4.5:1 kontrast bırakır (%55 siyah). */
.hero-search::before, .hero-search::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.hero-search::before { background: url("../img/hero-library.jpg") center / cover no-repeat; }
.hero-search::after { background: rgba(0, 0, 0, .55); }
[data-contrast="high"] .hero-search::before, [data-a11y-noimg] .hero-search::before { display: none; }
[data-contrast="high"] .hero-search::after { background: var(--sdu-hero); }
.hero-search .nav-tabs { border-bottom: 0; }
.hero-search .nav-tabs .nav-link { color: #fff; border: 0; border-radius: .5rem .5rem 0 0; text-shadow: 0 1px 3px rgba(0, 0, 0, .8); }
.hero-search .nav-tabs .nav-link.active { text-shadow: none; }
.hero-search .nav-tabs .nav-link.active { background: var(--sdu-card); color: var(--sdu-ink); }
.hero-search .tab-content { background: var(--sdu-card); color: var(--sdu-ink); border-radius: 0 .5rem .5rem .5rem; padding: 1.25rem; }
/* kesifaraci.com panelleri yüksekliğini bildirmediği için içerik yüksekliği ölçülüp sabitlendi (360–1250px genişlikte). */
.hero-search iframe { width: 100%; border: 0; display: block; overflow: hidden; }
.hero-search iframe.panel-discovery { height: 260px; }
.hero-search iframe.panel-journal { height: 185px; }
/* Gömülü paneller her zaman açık renkli; koyu temada çevresi de açık kalır. */
[data-bs-theme="dark"] .hero-search .tab-pane iframe { background: #fff; border-radius: .25rem; }

.home-carousel { position: relative; }
.home-carousel .carousel-item img { object-fit: cover; height: 360px; width: 100%; }
.home-carousel .carousel-caption { background: rgba(0, 0, 0, .7); border-radius: .5rem; padding: .75rem 1rem; }
/* Otomatik kayan slaytı durdurma düğmesi (WCAG 2.2.2) */
.carousel-pause {
    position: absolute;
    top: .75rem;
    right: .75rem;
    z-index: 3;
    width: 2.5rem;
    height: 2.5rem;
    border: 0;
    border-radius: 50%;
    background: rgba(0, 0, 0, .7);
    color: #fff;
}

/* Ana sayfa hızlı erişim kartları */
.service-card {
    display: flex;
    align-items: center;
    gap: .75rem;
    height: 100%;
    padding: 1.1rem 1.25rem;
    background: var(--sdu-card);
    color: var(--sdu-ink);
    border: 1px solid var(--sdu-line);
    border-radius: .75rem;
    box-shadow: var(--sdu-shadow);
    text-decoration: none;
    transition: border-color .15s, transform .15s;
}
.service-icon {
    display: grid;
    place-items: center;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: var(--sdu-tint);
    color: var(--sdu-accent);
    font-size: 1.4rem;
    flex-shrink: 0;
}
.service-title { display: block; font-weight: 600; color: var(--sdu-accent); }
.service-text { display: block; font-size: .875rem; color: var(--sdu-muted); }
.service-card:hover, .service-card:focus-visible { border-color: var(--sdu-accent); color: var(--sdu-ink); transform: translateY(-2px); }
.service-card:hover .service-icon { background: var(--sdu-red); color: #fff; }
[data-contrast="high"] .service-card { border: 2px solid var(--sdu-line); }

.announcement-list { --bs-list-group-bg: transparent; --bs-list-group-action-hover-bg: var(--sdu-tint); --bs-list-group-border-color: var(--sdu-line); }
.announcement-list .list-group-item { border-left: 3px solid transparent; }
.announcement-list .list-group-item:hover { border-left-color: var(--sdu-red); }

.info-tile {
    display: flex;
    gap: .75rem;
    align-items: center;
    background: var(--sdu-card);
    border-radius: .75rem;
    padding: 1rem;
    height: 100%;
    box-shadow: var(--sdu-shadow);
    text-decoration: none;
    color: var(--sdu-ink);
}
.info-tile i { font-size: 1.75rem; color: var(--sdu-accent); flex-shrink: 0; }
.info-tile > span { min-width: 0; }
.info-label { display: block; font-size: .8rem; color: var(--sdu-muted); }
.info-value { display: block; font-weight: 600; }
.info-tile:hover .info-value, .info-tile:focus .info-value { color: var(--sdu-accent); }

/* E-kaynaklar */
.letter-nav .btn { min-width: 2.4rem; }
.resource-item { border-bottom: 1px solid var(--sdu-line); padding: .9rem 0; }
.resource-item:last-child { border-bottom: 0; }
.resource-title { font-weight: 600; font-size: 1.05rem; }

/* Anket */
.star-rating { display: inline-flex; flex-direction: row-reverse; gap: .15rem; }
.star-rating input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.star-rating label { font-size: 1.6rem; color: var(--sdu-muted); cursor: pointer; }
.star-rating input:checked ~ label,
.star-rating label:hover,
.star-rating label:hover ~ label { color: var(--sdu-star); }
.star-rating input:focus-visible + label { outline: 3px solid var(--sdu-focus); outline-offset: 2px; }

/* Footer */
.site-footer { background: var(--sdu-hero); color: rgba(255, 255, 255, .85); flex-shrink: 0; }
.site-footer a { color: rgba(255, 255, 255, .85); text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.footer-title { font-size: 1rem; font-weight: 600; color: #fff; text-transform: uppercase; letter-spacing: .04em; }
.footer-links li, .footer-contact li { padding: .2rem 0; }
.footer-contact i { margin-right: .35rem; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .15); }

/* Form koruması */
.fg-field { position: absolute !important; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

@media (max-width: 575.98px) {
    .content-card { padding: 1.1rem; }
    .home-carousel .carousel-item img { height: 220px; }
}

.validation-summary-valid { display: none; }
.validation-summary-errors ul { margin-bottom: 0; }

/* Çerez onay bandı */
.consent-banner { position: fixed; inset: auto 0 0 0; z-index: 1080; background: var(--sdu-hero); color: #fff; box-shadow: 0 -2px 8px rgba(0, 0, 0, .2); }
.consent-banner a { color: #fff; text-decoration: underline; }

/* Odak halkası: klavye kullanıcıları için her zaman belirgin; iç beyaz/siyah hale sayesinde her zeminde ≥ 3:1 */
a:focus-visible, button:focus-visible, .btn:focus-visible, .form-control:focus-visible, .form-select:focus-visible,
.form-check-input:focus-visible, .page-link:focus-visible, [tabindex]:focus-visible {
    outline: 3px solid var(--sdu-focus);
    outline-offset: 2px;
    box-shadow: 0 0 0 2px var(--sdu-focus-halo);
}

/* Erişilebilirlik paneli */
.a11y-panel { --bs-offcanvas-width: 380px; --bs-offcanvas-bg: var(--sdu-card); --bs-offcanvas-color: var(--sdu-ink); }
.a11y-heading {
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--sdu-muted);
    margin-bottom: .5rem;
}
.a11y-text-value { min-width: 3.5rem; }
.palette-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; }
.palette-option {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding: .5rem;
    border: 2px solid var(--sdu-line);
    border-radius: .5rem;
    font-size: .875rem;
    line-height: 1.2;
    cursor: pointer;
}
.palette-option:hover { background: var(--sdu-tint); }
.btn-check:checked + .palette-option { border-color: var(--sdu-accent); background: var(--sdu-tint); font-weight: 600; }
.btn-check:focus-visible + .palette-option { outline: 3px solid var(--sdu-focus); outline-offset: 2px; }
.palette-swatch { width: 1.75rem; height: 1.75rem; border-radius: 50%; flex-shrink: 0; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .2); }
.swatch-kirmizi { background: linear-gradient(135deg, #c51e2a 50%, #55070d 50%); }
.swatch-davraz { background: linear-gradient(135deg, #2f4976 50%, #0a1526 50%); }
.swatch-elma { background: linear-gradient(135deg, #467326 50%, #16250c 50%); }
.swatch-gol { background: linear-gradient(135deg, #146080 50%, #051e28 50%); }
.swatch-gul { background: linear-gradient(135deg, #8f3a5a 50%, #2e101c 50%); }
.swatch-lavanta { background: linear-gradient(135deg, #564c86 50%, #1a1728 50%); }

/* Erişilebilirlik tercihleri (js/prefs.js kök öğeye öznitelik olarak yazar) */
[data-a11y-lh="1"] body { line-height: 1.9; }
[data-a11y-lh="2"] body { line-height: 2.2; }
[data-a11y-ls="1"] body { letter-spacing: .05em; word-spacing: .1em; }
[data-a11y-ls="2"] body { letter-spacing: .1em; word-spacing: .18em; }
[data-a11y-font] body, [data-a11y-font] body * { font-family: Verdana, Tahoma, "Trebuchet MS", sans-serif !important; font-style: normal !important; }
[data-a11y-links] a:not(.btn) { text-decoration: underline !important; text-underline-offset: 2px; }
[data-a11y-headings] :is(h1, h2, h3, h4) { background: #fef3c7; color: #1c1b1f !important; box-shadow: 0 0 0 3px #fef3c7; border-radius: 3px; width: fit-content; }
[data-bs-theme="dark"][data-a11y-headings] :is(h1, h2, h3, h4) { background: #78350f; color: #fff !important; box-shadow: 0 0 0 3px #78350f; }
[data-a11y-focus] :focus-visible { outline-width: 5px !important; outline-offset: 4px !important; box-shadow: 0 0 0 4px var(--sdu-focus-halo) !important; }
[data-a11y-motion], [data-a11y-motion] * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
[data-a11y-noimg] img, [data-a11y-noimg] video { visibility: hidden !important; }
/* Filtre kök öğeye uygulanır; body'ye uygulansaydı sabit konumlu panel/modal sayfayla birlikte kayardı. */
[data-a11y-filter="gray"] { filter: grayscale(1); }
[data-a11y-filter="desat"] { filter: saturate(.35); }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}