/* ===================================================================
   TEMA SISTEMI - CSS degiskenleri ile 4 hazir tema + dark mode
   =================================================================== */

/* Varsayilan: Indigo (Acik) */
:root, [data-theme="indigo"] {
    --color-primary: #4f46e5;
    --color-primary-dark: #4338ca;
    --color-primary-light: #eef2ff;
    --color-text: #1f2937;
    --color-text-muted: #6b7280;
    --color-bg: #f9fafb;
    --color-surface: #ffffff;
    --color-border: #e5e7eb;
    --color-success: #16a34a;
    --color-success-bg: #f0fdf4;
    --color-error: #b91c1c;
    --color-error-bg: #fef2f2;
    --hero-gradient: linear-gradient(135deg, #eef2ff 0%, #f9fafb 100%);
}

/* Zumrut (Acik) */
[data-theme="emerald"] {
    --color-primary: #059669;
    --color-primary-dark: #047857;
    --color-primary-light: #ecfdf5;
    --color-text: #1f2937;
    --color-text-muted: #6b7280;
    --color-bg: #f9fafb;
    --color-surface: #ffffff;
    --color-border: #e5e7eb;
    --color-success: #16a34a;
    --color-success-bg: #f0fdf4;
    --color-error: #b91c1c;
    --color-error-bg: #fef2f2;
    --hero-gradient: linear-gradient(135deg, #ecfdf5 0%, #f9fafb 100%);
}

/* Gunbatimi (Acik) */
[data-theme="sunset"] {
    --color-primary: #ea580c;
    --color-primary-dark: #c2410c;
    --color-primary-light: #fff7ed;
    --color-text: #1f2937;
    --color-text-muted: #6b7280;
    --color-bg: #fafaf9;
    --color-surface: #ffffff;
    --color-border: #e7e5e4;
    --color-success: #16a34a;
    --color-success-bg: #f0fdf4;
    --color-error: #b91c1c;
    --color-error-bg: #fef2f2;
    --hero-gradient: linear-gradient(135deg, #fff7ed 0%, #fafaf9 100%);
}

/* Koyu (Dark) */
[data-theme="dark"] {
    --color-primary: #818cf8;
    --color-primary-dark: #6366f1;
    --color-primary-light: #1e1b4b;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-bg: #0f172a;
    --color-surface: #1e293b;
    --color-border: #334155;
    --color-success: #4ade80;
    --color-success-bg: #052e16;
    --color-error: #f87171;
    --color-error-bg: #450a0a;
    --hero-gradient: linear-gradient(135deg, #1e1b4b 0%, #0f172a 100%);
}

:root {
    --radius: 10px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
    --header-height: 64px;
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    margin: 0;
    line-height: 1.55;
    font-size: 16px;
    transition: background-color var(--transition-base), color var(--transition-base);
}
h1, h2, h3 { line-height: 1.25; margin-top: 0; }
h1 { font-size: 1.75rem; margin-bottom: 1rem; }
h2 { font-size: 1.3rem; margin-top: 2rem; margin-bottom: 0.75rem; }
a { color: var(--color-primary); transition: color var(--transition-fast); }

/* ===== Giris animasyonu ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp 0.5s ease both; }
.fade-in-delay-1 { animation: fadeInUp 0.5s ease 0.1s both; }
.fade-in-delay-2 { animation: fadeInUp 0.5s ease 0.2s both; }
.fade-in-delay-3 { animation: fadeInUp 0.5s ease 0.3s both; }

/* ===== Header ===== */
.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 50;
    transition: background-color var(--transition-base), border-color var(--transition-base);
}
.site-header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.25rem;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    font-weight: 700;
    font-size: 1.15rem;
    text-decoration: none;
    color: var(--color-text);
    white-space: nowrap;
}
.site-nav {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}
.site-nav a, .site-nav button {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.6rem 0.75rem;
    border-radius: 8px;
    background: none;
    border: none;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}
.site-nav a:hover, .site-nav button:hover { background: var(--color-primary-light); color: var(--color-primary); }
.site-nav a.is-active { background: var(--color-primary); color: #fff; font-weight: 600; }
.site-nav .nav-form button:hover { background: var(--color-error-bg); color: var(--color-error); }
.site-nav .nav-cta { background: var(--color-primary); color: #fff; }
.site-nav .nav-cta.is-active { background: var(--color-primary-dark); }
.site-nav .nav-cta:hover { background: var(--color-primary-dark); color: #fff; }
.nav-form { display: inline; }

.nav-toggle-checkbox { display: none; }
.nav-toggle-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 0.5rem;
}
.nav-toggle-btn span {
    width: 22px;
    height: 2px;
    background: var(--color-text);
    display: block;
    transition: background-color var(--transition-fast);
}

/* ===== Banner ===== */
.site-banner {
    background: var(--color-primary-light);
    text-align: center;
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
}

/* ===== Layout ===== */
.site-main { max-width: 900px; margin: 0 auto; padding: 2rem 1.25rem 4rem; }
.site-main.wide { max-width: 1100px; }

.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    background: var(--color-primary);
    color: #fff;
    border-radius: 8px;
    text-decoration: none;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}
.btn:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--color-primary); border: 1.5px solid var(--color-primary); }
.btn-outline:hover { background: var(--color-primary-light); color: var(--color-primary); }

/* ===== Istatistik seridi ===== */
.stats-strip {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1.5rem;
    max-width: 900px;
    margin: -2.5rem auto 3rem;
    padding: 0 1.25rem;
    position: relative;
    z-index: 2;
}
.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem 1rem;
    text-align: center;
    box-shadow: var(--shadow-md);
}
.stat-card .stat-number { font-size: 1.75rem; font-weight: 800; color: var(--color-primary); }
.stat-card .stat-label { font-size: 0.85rem; color: var(--color-text-muted); margin-top: 0.25rem; }

/* ===== Bolum basligi (homepage) ===== */
.section-heading { text-align: center; max-width: 600px; margin: 0 auto 2rem; }
.section-heading h2 { font-size: 1.75rem; margin-top: 0; }
.section-heading p { color: var(--color-text-muted); }

/* ===== CTA bolumu ===== */
.cta-section {
    background: var(--color-primary);
    color: #fff;
    text-align: center;
    padding: 4rem 1.5rem;
    border-radius: var(--radius);
    margin: 3rem auto;
    max-width: 1100px;
}
.cta-section h2 { color: #fff; }
.cta-section p { color: rgba(255,255,255,0.85); }
.cta-section .btn { background: #fff; color: var(--color-primary); }
.cta-section .btn:hover { background: rgba(255,255,255,0.9); }

/* ===== Testimonials ===== */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
}
.testimonial-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}
.testimonial-card p { font-style: italic; color: var(--color-text); }
.testimonial-card .testimonial-author { margin-top: 1rem; font-weight: 600; font-size: 0.9rem; }

/* ===== Egitmenler slider (anasayfa) ===== */
.instructor-slider-wrap {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.instructor-slider {
    display: flex;
    gap: 1.25rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    padding: 0.5rem 0.25rem 1.25rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
}
.instructor-slide {
    scroll-snap-align: start;
    flex: 0 0 auto;
    width: 240px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem 1.25rem;
    text-align: center;
    transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}
.instructor-slide:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.instructor-slide-avatar {
    width: 76px;
    height: 76px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--color-primary-light);
    color: var(--color-primary);
}
.instructor-slide h3 { margin: 0 0 0.15rem; font-size: 1.05rem; }
.instructor-slide-title { color: var(--color-primary); font-size: 0.85rem; font-weight: 600; margin: 0 0 0.6rem; }
.instructor-slide-bio { color: var(--color-text-muted); font-size: 0.85rem; margin: 0; line-height: 1.5; }
.instructor-slider-nav {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}
.instructor-slider-nav:hover:not(:disabled) { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.instructor-slider-nav:disabled { opacity: 0.35; cursor: default; }
@media (max-width: 640px) {
    .instructor-slider-nav { display: none; }
}

/* ===== Formlar ===== */
.auth-form { max-width: 420px; margin: 0 auto; }
.auth-form label, form:not(.inline-form):not(.nav-form) label { display: block; margin-top: 1rem; font-weight: 600; font-size: 0.9rem; }
.auth-form input, .auth-form textarea, .auth-form select,
form:not(.inline-form):not(.nav-form) input,
form:not(.inline-form):not(.nav-form) textarea,
form:not(.inline-form):not(.nav-form) select {
    width: 100%;
    padding: 0.65rem 0.75rem;
    margin-top: 0.35rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition-fast);
}
.auth-form input:focus, form:not(.inline-form):not(.nav-form) input:focus,
form:not(.inline-form):not(.nav-form) textarea:focus,
form:not(.inline-form):not(.nav-form) select:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* ===== E-posta govdesi editoru (HTML kod / Onizleme sekmeleri) ===== */
.email-editor { margin-top: 0.35rem; }
.email-editor-tabs { display: flex; gap: 0.35rem; margin-bottom: 0.5rem; }
.email-editor-tab {
    padding: 0.4rem 0.9rem;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-muted);
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}
.email-editor-tab:hover { background: var(--color-primary-light); color: var(--color-primary); }
.email-editor-tab.is-active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.email-editor-code {
    width: 100% !important;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.85rem;
    margin-top: 0 !important;
}
.email-editor-preview {
    background: #ffffff;
    color: #1f2937;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1.5rem;
    min-height: 200px;
    overflow-x: auto;
}

.auth-form button[type="submit"],
form:not(.inline-form):not(.nav-form) button[type="submit"] {
    margin-top: 1.5rem;
    padding: 0.7rem 1.5rem;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color var(--transition-fast);
}
.auth-form button[type="submit"]:hover,
form:not(.inline-form):not(.nav-form) button[type="submit"]:hover { background: var(--color-primary-dark); }

.inline-form {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
    margin: 1rem 0;
    padding: 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}
.inline-form input, .inline-form select {
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.925rem;
    background: var(--color-surface);
    color: var(--color-text);
}
.inline-form button {
    padding: 0.55rem 1.1rem;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.925rem;
    transition: background-color var(--transition-fast);
}
.inline-form button:hover { background: var(--color-primary-dark); }

.errors {
    color: var(--color-error);
    background: var(--color-error-bg);
    border: 1px solid var(--color-error);
    border-radius: 8px;
    padding: 0.75rem 1.25rem;
    list-style: none;
    margin: 0 0 1rem;
}
.errors li { padding: 0.15rem 0; }

/* ===== Flash mesajlari (yönlendirme sonrasi tek seferlik bildirim) ===== */
.flash-message {
    max-width: 960px;
    margin: 0 auto 1.25rem;
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    font-size: 0.925rem;
}
.flash-success { background: var(--color-success-bg); color: var(--color-success); border: 1px solid var(--color-success); }
.flash-error { background: var(--color-error-bg); color: var(--color-error); border: 1px solid var(--color-error); }

/* ===== Rozetler / durumlar ===== */
.badge { display: inline-block; padding: 0.3rem 0.75rem; border-radius: 999px; font-size: 0.85rem; font-weight: 600; }
.badge-success { background: var(--color-success-bg); color: var(--color-success); }
.badge-error { background: var(--color-error-bg); color: var(--color-error); }
.badge-check { color: var(--color-success); font-weight: 700; margin-right: 0.35rem; }

/* ===== Ilerleme cubugu ===== */
.progress-bar-wrap { margin: 1rem 0; }
.progress-bar-track { background: var(--color-border); border-radius: 999px; height: 10px; overflow: hidden; width: 100%; max-width: 300px; }
.progress-bar-track-sm { height: 8px; max-width: 140px; margin-bottom: 0.3rem; }
.progress-bar-fill { background: var(--color-primary); height: 100%; border-radius: 999px; transition: width 0.4s ease; }
.progress-bar-label { font-size: 0.85rem; color: var(--color-text-muted); display: block; margin-top: 0.3rem; }

/* ===== Kartlar / grid ===== */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1.25rem; margin-top: 1rem; }
.course-card {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
    overflow: hidden;
}
a.course-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); border-color: var(--color-primary); }
.course-card-body { padding: 1.25rem; }
.course-card-thumb {
    height: 120px;
    background: var(--hero-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--color-primary);
}
.course-card h3 { margin: 0 0 0.6rem; font-size: 1.05rem; line-height: 1.35; }
.course-card p { margin: 0.2rem 0; color: var(--color-text-muted); font-size: 0.9rem; }
.course-card .price-tag { color: var(--color-primary); font-weight: 700; font-size: 1rem; }
.course-card-instructor { display: flex; align-items: center; gap: 0.5rem; }
.course-card-category {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    margin-bottom: 0.5rem;
}

/* ===== Egitimler arama/filtre formu ===== */
.catalog-search-form {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    align-items: center;
    margin-bottom: 1.75rem;
    padding: 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}
.catalog-search-form input[type="text"] {
    flex: 1 1 220px;
    min-width: 0;
    margin: 0;
}
.catalog-search-form select { flex: 0 1 180px; margin: 0; }
.catalog-search-form button { flex: 0 0 auto; }
.catalog-search-clear { font-size: 0.85rem; color: var(--color-text-muted); white-space: nowrap; }
.catalog-search-clear:hover { color: var(--color-primary); }
@media (max-width: 640px) {
    .catalog-search-form { flex-direction: column; align-items: stretch; }
    .catalog-search-form select, .catalog-search-form button { flex: 1 1 auto; }
}
.course-card-instructor-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 0.7rem;
    font-weight: 700;
    flex-shrink: 0;
}
.course-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.9rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--color-border);
}
.course-card-cta { font-size: 0.85rem; font-weight: 600; color: var(--color-primary); opacity: 0; transform: translateX(-4px); transition: opacity var(--transition-fast), transform var(--transition-fast); }
a.course-card:hover .course-card-cta { opacity: 1; transform: translateX(0); }
.empty-state { text-align: center; padding: 4rem 1rem; color: var(--color-text-muted); }
.empty-state-icon { font-size: 2.5rem; margin-bottom: 0.75rem; }

/* ===== Kurs detay sayfasi ===== */
.course-hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    margin-top: 1.5rem;
}
.course-breadcrumb { font-size: 0.85rem; opacity: 0.85; margin-bottom: 0.75rem; }
.course-breadcrumb a { color: #fff; text-decoration: underline; }
.course-breadcrumb span { margin: 0 0.35rem; }
.course-hero h1 { color: #fff; margin: 0 0 0.75rem; font-size: 1.9rem; }
.course-hero-desc { color: rgba(255,255,255,0.9); max-width: 640px; margin: 0 0 1.25rem; line-height: 1.6; }
.course-hero-meta { display: flex; flex-wrap: wrap; gap: 1.25rem; font-size: 0.9rem; color: rgba(255,255,255,0.95); }
.course-hero-meta-item { display: inline-flex; align-items: center; gap: 0.35rem; }

.course-detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 2rem;
    margin-top: 2rem;
    align-items: start;
}
@media (max-width: 860px) {
    .course-detail-grid { grid-template-columns: 1fr; }
}

.section-block {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem 1.75rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}
.section-block h2 { margin-top: 0; font-size: 1.25rem; }

/* ===== Admin tarafindan yonetilen sayfalar (SSS, Iletisim vb.) ===== */
.page-content { line-height: 1.7; color: var(--color-text); }
.page-content h2 { font-size: 1.2rem; margin: 1.75rem 0 0.6rem; }
.page-content h2:first-child { margin-top: 0; }
.page-content h3 { font-size: 1.05rem; margin: 1.5rem 0 0.5rem; }
.page-content p { margin: 0 0 1rem; color: var(--color-text); }
.page-content ul, .page-content ol { margin: 0 0 1rem; padding-left: 1.4rem; }
.page-content li { margin-bottom: 0.4rem; }
.page-content a { color: var(--color-primary); }
.page-content strong { color: var(--color-text); }
.curriculum-summary { color: var(--color-text-muted); font-size: 0.9rem; margin-top: -0.5rem; }

.curriculum-section { margin-top: 1.25rem; }
.curriculum-section-title { font-size: 1rem; margin: 0 0 0.5rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--color-border); }
.curriculum-lesson-list { list-style: none; margin: 0; padding: 0; }
.curriculum-lesson {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.65rem 0.25rem;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.92rem;
}
.curriculum-lesson:last-child { border-bottom: none; }
.curriculum-lesson-icon { flex-shrink: 0; width: 1.2rem; text-align: center; color: var(--color-text-muted); }
.curriculum-lesson-title { flex: 1; color: var(--color-text); text-decoration: none; }
a.curriculum-lesson-title:hover { color: var(--color-primary); }
.curriculum-lesson-title.is-locked { color: var(--color-text-muted); }
.curriculum-lesson-duration { color: var(--color-text-muted); font-size: 0.82rem; flex-shrink: 0; }
.badge-preview { background: var(--color-primary-light); color: var(--color-primary); flex-shrink: 0; padding: 0.15rem 0.55rem; font-size: 0.72rem; }

.instructor-card-inner { display: flex; gap: 1.25rem; align-items: flex-start; }
.instructor-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    font-weight: 700;
    background: var(--color-primary-light);
    color: var(--color-primary);
}
.cert-badge-list { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.85rem; }
.cert-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
}

.course-sidebar { position: sticky; top: 1.5rem; }
.buy-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.buy-box-thumb {
    height: 140px;
    background: var(--color-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}
.buy-box-body { padding: 1.5rem; }
.buy-box-price { font-size: 1.6rem; font-weight: 700; color: var(--color-primary); margin-bottom: 1rem; }
.buy-box-facts { list-style: none; margin: 1.25rem 0 0; padding: 0; font-size: 0.88rem; color: var(--color-text-muted); display: flex; flex-direction: column; gap: 0.55rem; }

/* ===== Odeme (checkout) sayfasi ===== */
.checkout-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 2rem;
    margin-top: 1.5rem;
    align-items: start;
}
@media (max-width: 860px) {
    .checkout-grid { grid-template-columns: 1fr; }
}
.checkout-sidebar { position: sticky; top: 1.5rem; }
.checkout-coupon-row input[type="text"] { margin: 0; }
.checkout-price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    color: var(--color-text-muted);
    padding: 0.3rem 0;
}
.checkout-price-total { font-size: 1.15rem; color: var(--color-text); }
.checkout-price-total strong { color: var(--color-primary); }
.checkout-trust-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

.payment-method-list { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 0.75rem; }
.payment-method-card {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 1rem 1.1rem;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}
.payment-method-card:hover { border-color: var(--color-primary); background: var(--color-primary-light); }
.payment-method-card input[type="radio"] { width: auto; margin: 0; flex-shrink: 0; }
.payment-method-card:has(input:checked) { border-color: var(--color-primary); background: var(--color-primary-light); box-shadow: 0 0 0 1px var(--color-primary); }
.payment-method-icon { font-size: 1.5rem; flex-shrink: 0; }
.payment-method-info { display: flex; flex-direction: column; gap: 0.15rem; }
.payment-method-info strong { font-size: 0.95rem; }
.payment-method-info small { color: var(--color-text-muted); font-size: 0.8rem; }

.bank-details-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin: 1.25rem 0;
}
.bank-details-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9rem;
}
.bank-details-row:last-child { border-bottom: none; }
.bank-details-row span { color: var(--color-text-muted); }
.bank-details-iban { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: 0.5px; }

.section-block {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin: 1rem 0;
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.cert-result { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1.25rem; margin-top: 1rem; }

.lesson-list { list-style: none; padding: 0; }
.lesson-list li { padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--color-border); }
.lesson-list li:last-child { border-bottom: none; }

/* ===== Tablolar (mobilde yatay kaydirma) ===== */
.data-table-wrap {
    width: 100%;
    overflow-x: auto;
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius);
}
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    min-width: 480px;
}
.data-table th, .data-table td { text-align: left; padding: 0.75rem 1rem; border-bottom: 1px solid var(--color-border); font-size: 0.87rem; vertical-align: middle; }
.data-table th { background: var(--color-primary-light); font-weight: 700; color: var(--color-text-muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr { transition: background-color var(--transition-fast); }
.data-table tbody tr:hover { background: var(--color-primary-light); }

/* Tablo hucreleri icindeki formlar/butonlar: genel form/button kurallari
   (auth-form/dashboard formlarina gore olceklendirilmis buyuk padding +
   margin-top) burada UYGUNSUZ - kompakt, satir-ici buton gorunumu gerekir. */
.data-table form { display: inline-block; margin: 0 0.3rem 0 0; vertical-align: middle; }
.data-table td form:last-child { margin-right: 0; }
.data-table button[type="submit"] {
    margin-top: 0 !important;
    padding: 0.4rem 0.85rem !important;
    font-size: 0.8rem !important;
    border-radius: 6px !important;
    background: var(--color-surface) !important;
    color: var(--color-text) !important;
    border: 1px solid var(--color-border) !important;
    cursor: pointer;
    font-family: inherit;
    transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.data-table button[type="submit"]:hover { background: var(--color-primary-light) !important; color: var(--color-primary) !important; border-color: var(--color-primary) !important; }
.data-table .btn-danger { border-color: transparent !important; }
.data-table .btn-danger:hover { background: var(--color-error) !important; color: #fff !important; }
.data-table a { font-size: 0.87rem; }

.btn-danger {
    background: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid transparent;
}
.btn-danger:hover { background: var(--color-error); color: #fff; }

/* ===== Kupon formu (eğitim kapsami secici) ===== */
.coupon-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 480px) { .coupon-form-row { grid-template-columns: 1fr; } }
.coupon-scope-options { margin-top: 0.4rem; }
.coupon-course-picker {
    margin-top: 0.75rem;
    padding: 0.9rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg);
    max-height: 220px;
    overflow-y: auto;
}

/* ===== Footer ===== */
.site-footer { border-top: 1px solid var(--color-border); margin-top: 3rem; background: var(--color-surface); }
.site-footer-inner { max-width: 1100px; margin: 0 auto; padding: 2rem 1.25rem; text-align: center; color: var(--color-text-muted); font-size: 0.875rem; }
.footer-nav { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin: 0.75rem 0; }
.footer-nav a { color: var(--color-text-muted); text-decoration: none; }
.footer-nav a:hover { color: var(--color-primary); }
.footer-copy { margin: 0.5rem 0 0; }

/* ===== Tema Secici ===== */
.theme-switcher { position: relative; margin-right: 0.5rem; }
.theme-switcher-btn {
    width: 36px; height: 36px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    background: var(--color-surface);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    padding: 0;
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}
.theme-switcher-btn:hover { border-color: var(--color-primary); transform: scale(1.05); }
.theme-swatch { width: 18px; height: 18px; border-radius: 50%; display: block; background: var(--color-primary); }
.theme-swatch-indigo { background: #4f46e5; }
.theme-swatch-emerald { background: #059669; }
.theme-swatch-sunset { background: #ea580c; }
.theme-swatch-dark { background: #1e293b; border: 1px solid #818cf8; }
.theme-switcher-menu {
    display: none;
    position: absolute;
    top: 44px;
    right: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 0.5rem;
    min-width: 160px;
    z-index: 100;
}
.theme-switcher-menu.is-open { display: block; animation: fadeInUp 0.15s ease both; }
.theme-option {
    display: flex; align-items: center; gap: 0.6rem;
    width: 100%;
    padding: 0.5rem 0.6rem;
    background: none; border: none; border-radius: 6px;
    color: var(--color-text); font-size: 0.9rem; font-family: inherit;
    cursor: pointer; text-align: left;
    transition: background-color var(--transition-fast);
}
.theme-option:hover { background: var(--color-primary-light); }

/* ===== Hero Slider ===== */
.hero-slider {
    position: relative;
    text-align: center;
    padding: 5rem 1rem;
    background: var(--hero-gradient);
    border-bottom: 1px solid var(--color-border);
    overflow: hidden;
}
.hero-slide {
    display: none;
    max-width: 640px;
    margin: 0 auto;
    animation: fadeInUp 0.5s ease both;
}
.hero-slide.is-active { display: block; }
.hero-slide h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
.hero-slide p { color: var(--color-text-muted); font-size: 1.15rem; margin: 0.75rem auto 0; }
.hero-actions { margin-top: 2rem; display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.hero-slider-dots { display: flex; gap: 0.5rem; justify-content: center; margin-top: 2.5rem; }
.hero-slider-dot {
    width: 9px; height: 9px; border-radius: 50%;
    background: var(--color-border);
    border: none; cursor: pointer; padding: 0;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}
.hero-slider-dot.is-active { background: var(--color-primary); transform: scale(1.3); }

/* ===== Profesyonel Footer ===== */
.footer-columns {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2.5rem;
    text-align: left;
    padding-bottom: 2rem;
}
.footer-col h4 { font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text); margin: 0 0 1rem; }
.footer-logo { font-weight: 700; font-size: 1.1rem; color: var(--color-text); margin-bottom: 0.75rem; }
.footer-text { color: var(--color-text-muted); font-size: 0.9rem; max-width: 320px; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 0.6rem; }
.footer-links a { color: var(--color-text-muted); text-decoration: none; font-size: 0.9rem; transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--color-primary); }
.footer-bottom { border-top: 1px solid var(--color-border); padding-top: 1.5rem; text-align: center; }
.footer-copy { margin: 0; color: var(--color-text-muted); font-size: 0.85rem; }

/* ===== Mobil uyumluluk ===== */
@media (max-width: 900px) {
    .site-header-inner { justify-content: flex-start; gap: 0.75rem; }
    .nav-toggle-btn { display: flex; order: -1; }
    .logo { margin-right: auto; }
    .site-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        bottom: 0;
        width: 240px;
        flex-direction: column;
        flex-wrap: nowrap;
        align-items: stretch;
        justify-content: flex-start;
        gap: 0.15rem;
        padding: 1.5rem 0.75rem;
        background: var(--color-surface);
        border-right: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
        z-index: 55;
        overflow-y: auto;
    }
    .site-nav a, .site-nav button { width: 100%; text-align: left; padding: 0.65rem 0.5rem; }
    .nav-toggle-checkbox:checked ~ .site-nav { transform: translateX(0); }
    .site-main { padding: 1.25rem 1rem 3rem; }
    .hero-slider { padding: 3rem 1rem; }
    .hero-slide h1 { font-size: 1.75rem; }
    .stats-strip { margin-top: -1.5rem; }
    .inline-form { flex-direction: column; align-items: stretch; }
    .footer-columns { grid-template-columns: 1fr; gap: 2rem; text-align: center; }
    .footer-text { margin: 0 auto; }
}

/* ===================================================================
   SIDEBAR LAYOUT (Panel / Admin sayfalari)
   =================================================================== */
body.has-sidebar { display: flex; flex-direction: column; min-height: 100vh; }

.dash-topbar {
    height: var(--header-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0 1.25rem;
    position: sticky;
    top: 0;
    z-index: 60;
}
.dash-topbar .logo { margin-right: auto; font-weight: 700; }
.dash-topbar-right { display: flex; align-items: center; gap: 0.5rem; }
.topbar-link { color: var(--color-text-muted); text-decoration: none; font-size: 0.9rem; padding: 0.6rem 0.75rem; border-radius: 8px; transition: background-color var(--transition-fast); }
.topbar-link:hover { background: var(--color-primary-light); color: var(--color-primary); }
.dash-topbar-right .nav-form button {
    background: none; border: none; color: var(--color-text-muted); font-family: inherit;
    font-size: 0.9rem; cursor: pointer; padding: 0.6rem 0.75rem; border-radius: 8px;
    transition: background-color var(--transition-fast);
}
.dash-topbar-right .nav-form button:hover { background: var(--color-error-bg); color: var(--color-error); }

.sidebar-toggle-checkbox { display: none; }
.sidebar-toggle-btn { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 0.5rem; }
.sidebar-toggle-btn span { width: 22px; height: 2px; background: var(--color-text); display: block; }

.dash-shell { display: flex; flex: 1; }
.dash-sidebar {
    width: 240px;
    flex-shrink: 0;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    padding: 1.5rem 0.75rem;
}
.dash-sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
    max-height: calc(100vh - var(--header-height) - 3rem);
    overflow-y: auto;
}
.sidebar-group { display: flex; flex-direction: column; gap: 0.15rem; }
.sidebar-group-label {
    font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em;
    color: var(--color-text-muted); padding: 0 0.75rem; margin-bottom: 0.4rem;
}
.dash-sidebar-nav a {
    color: var(--color-text); text-decoration: none; font-size: 0.9rem;
    padding: 0.6rem 0.75rem; border-radius: 8px;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}
.dash-sidebar-nav a:hover { background: var(--color-primary-light); color: var(--color-primary); }
.dash-sidebar-nav a.is-active { background: var(--color-primary); color: #fff; font-weight: 600; }

.dash-main { flex: 1; min-width: 0; padding: 2rem; max-width: 1200px; }

/* ===== Panel icerik karti (dash-main icindeki <section>'lar) =====
   Onceden panel sayfalarindaki <section> etiketleri hicbir gorsel cerceve
   olmadan sayfa arkaplaninda "cikip" duruyordu; bu da panelin dagimik ve
   amator gorunmesinin basli baslica nedeniydi. Artik her sayfa govdesi bir
   kart icinde, tutarli bir baslik hiyerarsisiyle sunuluyor. */
.dash-main > section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 1.75rem 2rem 2rem;
}
.dash-main > section > h1:first-child {
    margin: 0 0 0.35rem;
    font-size: 1.5rem;
    letter-spacing: -0.01em;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}
.dash-main > section > p:first-of-type,
.dash-main > section > h1:first-child + p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-top: -0.5rem;
    margin-bottom: 1.5rem;
}
.dash-main > section .section-block {
    background: var(--color-bg);
    box-shadow: none;
}
.dash-main > section > h2 { font-size: 1.1rem; margin: 1.75rem 0 0.75rem; }
.dash-main > section > h2:first-child,
.dash-main > section > h1:first-child + p + h2 { margin-top: 0; }

/* Panel formlarini (site genelindeki genis, ortalanmis auth-form disinda)
   makul bir okunabilirlik genisligiyle sinirla - aksi halde metin
   girisleri panelin tum genisligine yayilip garip gorunuyordu. */
.dash-main form:not(.inline-form):not(.nav-form):not(.coupon-course-picker):not(.catalog-search-form) {
    max-width: 640px;
}
.dash-main .data-table-wrap,
.dash-main .data-table-wrap form { max-width: none; }

@media (max-width: 900px) {
    .dash-sidebar {
        position: fixed; top: var(--header-height); left: 0; bottom: 0;
        transform: translateX(-100%);
        transition: transform var(--transition-base);
        z-index: 55; overflow-y: auto;
        box-shadow: var(--shadow-md);
    }
    .sidebar-toggle-checkbox:checked ~ .dash-shell .dash-sidebar { transform: translateX(0); }
    .sidebar-toggle-btn { display: flex; }
    .dash-main { padding: 1.25rem 1rem; }
    .topbar-link { display: none; }
}

/* ===== Sayfa basligi (aksiyon butonuyla) ===== */
.page-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; margin-bottom: 1rem; }
.page-header h1 { margin-bottom: 0; }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }

/* ===================================================================
   SERTIFIKA TASARIMCISI
   =================================================================== */
.designer-layout { display: grid; grid-template-columns: 1fr 280px; gap: 1.5rem; margin-top: 1.5rem; align-items: start; }
.designer-canvas-wrap { min-width: 0; }
.designer-canvas {
    position: relative;
    width: 100%;
    aspect-ratio: 297 / 210;
    background: #ffffff;
    border: 3px solid #4F46E5;
    border-radius: 4px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    cursor: default;
}
.designer-element {
    position: absolute;
    padding: 2px 4px;
    cursor: move;
    white-space: pre-wrap;
    word-break: break-word;
    border: 1px dashed transparent;
    user-select: none;
    line-height: 1.3;
}
.designer-element:hover { border-color: #9ca3af; }
.designer-element.is-selected { border: 1px dashed var(--color-primary); background: rgba(79, 70, 229, 0.06); }
.designer-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    position: sticky;
    top: calc(var(--header-height) + 1rem);
}
.designer-panel label { display: block; margin-top: 0.9rem; font-weight: 600; font-size: 0.85rem; }
.designer-panel textarea, .designer-panel input[type="range"] { width: 100%; margin-top: 0.3rem; }
.designer-panel input[type="color"] { width: 100%; height: 38px; padding: 3px; margin-top: 0.3rem; }

@media (max-width: 900px) {
    .designer-layout { grid-template-columns: 1fr; }
    .designer-panel { position: static; }
}