/* =========================================================================
   Yerleşim: kapsayıcı, başlık, gezinme, ızgara, alt bilgi
   ========================================================================= */

.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: var(--sp-5);
}
.container--narrow { max-width: var(--container-narrow); }

/* --- Başlık --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-header);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border);
}

.header-bar {
    height: var(--header-h);
    display: flex;
    align-items: center;
    gap: var(--sp-5);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    flex-shrink: 0;
    color: var(--text);
}
.brand:hover { color: var(--text); }

.brand__mark {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
    color: #fff;
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: var(--text-md);
    letter-spacing: -0.02em;
    box-shadow: var(--shadow-xs);
}

.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name {
    font-weight: 680;
    font-size: var(--text-md);
    letter-spacing: -0.02em;
}
.brand__tag {
    font-size: var(--text-xs);
    color: var(--text-subtle);
    font-weight: 500;
}

.header-search { flex: 1; min-width: 0; max-width: 520px; }

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--sp-1);
    margin-left: auto;
}

.icon-btn {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    transition: background var(--transition), color var(--transition);
}
.icon-btn:hover { background: var(--surface-hover); color: var(--text); }
.icon-btn svg { width: 19px; height: 19px; }

/* Tema düğmesi: yalnızca etkin temanın simgesi görünür */
:root[data-theme="dark"] .theme-toggle__sun,
:root:not([data-theme="light"]) .theme-toggle__sun { display: none; }
:root[data-theme="dark"] .theme-toggle__moon,
:root:not([data-theme="light"]) .theme-toggle__moon { display: block; }
:root[data-theme="light"] .theme-toggle__sun { display: block; }
:root[data-theme="light"] .theme-toggle__moon { display: none; }
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) .theme-toggle__sun { display: block; }
    :root:not([data-theme="dark"]) .theme-toggle__moon { display: none; }
}

/* --- Ana gezinme --- */
.site-nav { border-top: 1px solid var(--border); }
.site-nav__list {
    display: flex;
    gap: var(--sp-1);
    overflow-x: auto;
    scrollbar-width: none;
}
.site-nav__list::-webkit-scrollbar { display: none; }

.site-nav__link {
    display: block;
    padding: var(--sp-3) var(--sp-4);
    font-size: var(--text-sm);
    font-weight: 550;
    color: var(--text-muted);
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    transition: color var(--transition), border-color var(--transition);
}
.site-nav__link:hover { color: var(--text); }
.site-nav__link.is-active {
    color: var(--brand-600);
    border-bottom-color: var(--brand-500);
}
:root[data-theme="dark"] .site-nav__link.is-active { color: var(--brand-300); }

/* --- Sayfa gövdesi --- */
.main { flex: 1; padding-block: var(--sp-8) var(--sp-16); }

.page-head { margin-bottom: var(--sp-6); }
.page-head__title { font-size: var(--text-2xl); }
.page-head__meta {
    margin-top: var(--sp-2);
    color: var(--text-muted);
    font-size: var(--text-sm);
}

/* İki sütunlu içerik + kenar çubuğu */
.layout-split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: var(--sp-8);
    align-items: start;
}
@media (max-width: 900px) {
    .layout-split { grid-template-columns: minmax(0, 1fr); }
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--sp-4);
    position: sticky;
    top: calc(var(--header-h) + var(--sp-4));
}
@media (max-width: 900px) {
    .sidebar { position: static; }
}

/* Esnek kart ızgarası */
.grid {
    display: grid;
    gap: var(--sp-4);
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.grid--2 { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }

/* --- Alt bilgi --- */
.site-footer {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    padding-block: var(--sp-10) var(--sp-6);
    font-size: var(--text-sm);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr repeat(3, 1fr);
    gap: var(--sp-8);
    margin-bottom: var(--sp-8);
}
@media (max-width: 820px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-6); }
    .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
    .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand__text {
    margin-top: var(--sp-3);
    color: var(--text-muted);
    max-width: 40ch;
}

.footer-col__title {
    font-size: var(--text-xs);
    font-weight: 650;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-subtle);
    margin-bottom: var(--sp-3);
}
.footer-col__list { display: flex; flex-direction: column; gap: var(--sp-2); }
.footer-col__list a { color: var(--text-muted); }
.footer-col__list a:hover { color: var(--link); }

.footer-legal {
    border-top: 1px solid var(--border);
    padding-top: var(--sp-5);
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-4);
    justify-content: space-between;
    color: var(--text-subtle);
    font-size: var(--text-xs);
}

.footer-disclaimer {
    background: var(--bg-sunken);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--sp-4);
    color: var(--text-muted);
    font-size: var(--text-xs);
    line-height: var(--leading-snug);
    margin-bottom: var(--sp-6);
}
.footer-disclaimer strong { color: var(--text); }