/* =====================================================
   BIYOGAZ AKADEMISI - Public Site Styles
   Sayfa-spesifik stiller, layout, grid sistemleri
   ===================================================== */

/* === LAYOUT === */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--page-pad-x);
}

.section {
    padding: var(--section-pad) 0;
}
.section.hero    { padding: var(--section-pad-hero) 0; }
.section.compact { padding: var(--section-pad-compact) 0; }

.section-divider-strong {
    border-top: 2px solid var(--ink-900);
}

.bg-paper-2 { background: var(--paper-2); }
.bg-paper-3 { background: var(--paper-3); }
.bg-navy    { background: var(--navy-900); color: var(--sky-100); }

/* === GRID === */
.grid-12 {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--grid-gap);
}

.col-1  { grid-column: span 1; }
.col-2  { grid-column: span 2; }
.col-3  { grid-column: span 3; }
.col-4  { grid-column: span 4; }
.col-5  { grid-column: span 5; }
.col-6  { grid-column: span 6; }
.col-7  { grid-column: span 7; }
.col-8  { grid-column: span 8; }
.col-9  { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-11 { grid-column: span 11; }
.col-12 { grid-column: span 12; }

/* === HEADER NAV === */
.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
    background: var(--paper);
    border-bottom: 1px solid var(--ink-900);
}
.site-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px var(--page-pad-x);
    gap: 24px;
}
.site-brand {
    display: flex;
    align-items: baseline;
    gap: 16px;
    text-decoration: none;
    color: var(--ink-900);
}
.site-brand-name {
    font-family: var(--serif);
    font-size: 22px;
    font-weight: 500;
    letter-spacing: -0.01em;
}
.site-brand-meta {
    font-family: var(--mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--ink-500);
}

.site-nav {
    display: flex;
    gap: 26px;
    align-items: center;
}
.site-nav a {
    font-family: var(--sans);
    font-size: 13px;
    color: var(--ink-900);
    text-decoration: none;
    padding-bottom: 2px;
    border-bottom: 2px solid transparent;
    transition: border-color 0.15s ease, color 0.15s ease;
}
.site-nav a:hover, .site-nav a.active {
    border-bottom-color: var(--navy-800);
    color: var(--navy-800);
    font-weight: 600;
}

.site-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
.locale-switch {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--ink-500);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-decoration: none;
    padding: 4px 8px;
    border: 1px solid var(--rule);
}
.locale-switch:hover { border-color: var(--ink-900); color: var(--ink-900); }

/* === BREADCRUMB === */
.breadcrumb {
    background: var(--paper-2);
    border-bottom: 1px solid var(--rule);
    padding: 10px var(--page-pad-x);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    color: var(--ink-500);
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.breadcrumb a { color: var(--ink-500); text-decoration: none; }
.breadcrumb a:hover { color: var(--ink-900); }
.breadcrumb-sep { color: var(--ink-300); }
.breadcrumb-current { color: var(--ink-900); }

/* === FOOTER === */
.site-footer {
    background: var(--navy-900);
    color: var(--sky-100);
    padding: 48px var(--page-pad-x) 24px;
    margin-top: 80px;
}
.site-footer-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.15);
    max-width: 1280px;
    margin: 0 auto;
}
.site-footer-brand {
    grid-column: span 4;
}
.site-footer-brand-title {
    font-family: var(--serif);
    font-size: 22px;
    color: #fff;
    margin: 0 0 12px;
}
.site-footer-brand-text {
    font-size: 13px;
    color: var(--sky-300);
    line-height: 1.55;
    margin: 0;
}
.site-footer-col {
    grid-column: span 2;
}
.site-footer-title {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--sky-400);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin: 0 0 12px;
}
.site-footer-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.site-footer-list a {
    color: var(--sky-100);
    text-decoration: none;
    font-size: 13px;
}
.site-footer-list a:hover { color: #fff; text-decoration: underline; }

.site-footer-newsletter {
    grid-column: span 2;
}
.site-footer-newsletter-form {
    display: flex;
    margin-top: 8px;
    border: 1px solid var(--sky-500);
}
.site-footer-newsletter-form input {
    flex: 1;
    padding: 9px 12px;
    background: transparent;
    border: 0;
    color: #fff;
    outline: none;
    font-size: 12px;
}
.site-footer-newsletter-form input::placeholder { color: var(--sky-300); }
.site-footer-newsletter-form button {
    background: var(--sky-500);
    color: #fff;
    padding: 0 14px;
    font-family: var(--mono);
    font-size: 11px;
    border: 0;
    cursor: pointer;
}

.site-footer-bottom {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    padding-top: 14px;
    font-size: 11px;
    font-family: var(--mono);
    color: var(--sky-400);
    flex-wrap: wrap;
    gap: 8px;
}

/* === FLASH MESSAGE === */
.flash {
    padding: 12px 18px;
    border: 1px solid var(--rule);
    margin-bottom: 24px;
    font-size: 14px;
}
.flash.success { background: var(--status-green); color: var(--status-green-ink); border-color: var(--status-green); }
.flash.error   { background: var(--status-red); color: var(--status-red-ink); border-color: var(--status-red); }
.flash.warning { background: var(--status-orange); color: var(--status-orange-ink); border-color: var(--status-orange); }
.flash.info    { background: var(--sky-100); color: var(--navy-800); border-color: var(--sky-300); }

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    :root {
        --page-pad-x: var(--page-pad-md);
    }
    .site-footer-brand   { grid-column: span 6; }
    .site-footer-col     { grid-column: span 3; }
    .site-footer-newsletter { grid-column: span 12; margin-top: 16px; }
}

@media (max-width: 768px) {
    :root {
        --page-pad-x: var(--page-pad-sm);
        --section-pad: 40px;
        --section-pad-hero: 56px;
    }
    .site-nav { display: none; } /* Mobile menu eklenecek */
    .site-brand-meta { display: none; }

    .grid-12 > [class^="col-"] {
        grid-column: span 12;
    }

    .site-footer-grid > * { grid-column: span 12; }
}