:root {
    --primary: #111827;
    --accent: #d97706; /* Kabza/Ahşap hissiyatı veren premium turuncu/kehribar */
    --accent-hover: #b45309;
    --bg-light: #f9fafb;
    --text-main: #374151;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    --container-width: 1140px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background-color: #ffffff;
    line-height: 1.6;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    padding: 18px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--accent);
}

.main-nav ul {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 24px;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.main-nav a:hover {
    color: var(--accent);
}

/* Buttons */
.btn-primary-sm {
    background: var(--accent);
    color: #fff !important;
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 600 !important;
}

.btn-secondary {
    display: inline-block;
    margin-top: 15px;
    padding: 10px 18px;
    background: var(--primary);
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(180deg, #f9fafb 0%, #ffffff 100%);
    text-align: center;
}

.badge {
    background: #fef3c7;
    color: #92400e;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.hero h1 {
    font-size: 2.75rem;
    color: var(--primary);
    margin: 20px 0;
    font-weight: 800;
    line-height: 1.2;
}

.highlight {
    color: var(--accent);
}

.hero p {
    max-width: 650px;
    margin: 0 auto 30px auto;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.search-box {
    max-width: 550px;
    margin: 0 auto;
    display: flex;
    gap: 10px;
}

.search-box input {
    flex: 1;
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    outline: none;
}

.search-box button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}

/* Sections */
.section {
    padding: 70px 0;
}

.bg-light {
    background-color: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 45px;
}

.section-header h2 {
    font-size: 2rem;
    color: var(--primary);
}

.section-header p {
    color: var(--text-muted);
}

/* Grids */
.grid {
    display: grid;
    gap: 24px;
}

.grid-brand {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.brand-card {
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s, box-shadow 0.2s;
    background: #fff;
}

.brand-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    border-color: var(--accent);
}

.brand-card h3 {
    color: var(--primary);
    font-size: 1.4rem;
}

.brand-card span {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 5px;
}

.brand-card .link-text {
    color: var(--accent);
    font-weight: 600;
    margin-top: 15px;
}

.grid-material {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.material-card {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.material-tag {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 700;
    text-transform: uppercase;
}

.material-card h3 {
    margin: 10px 0;
}

/* Footer */
.site-footer {
    background: var(--primary);
    color: #9ca3af;
    padding: 40px 0;
    font-size: 0.9rem;
}

.footer-info {
    max-width: 600px;
    margin: 0 auto 15px auto;
}

.footer-info strong {
    color: #fff;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .main-nav { display: none; } /* Mobil menü JS ile açılacak */
    .hero h1 { font-size: 2rem; }
    .search-box { flex-direction: column; }
    .search-box button { padding: 14px; }
}

/* Page Banner & Breadcrumb */
.page-banner {
    background: #f3f4f6;
    padding: 35px 0;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.breadcrumb a {
    color: var(--text-main);
    text-decoration: none;
}

.page-banner h1 {
    font-size: 2rem;
    color: var(--primary);
}

/* Layout Grid for Pages */
.content-grid {
    display: grid;
    grid-template-columns: 2.5fr 1fr;
    gap: 40px;
}

.article-content h2 { margin: 25px 0 15px 0; color: var(--primary); }
.article-content h3 { margin: 20px 0 10px 0; color: var(--primary); }
.article-content p { margin-bottom: 15px; }
.article-content ul { margin: 0 0 20px 20px; }
.article-content a { color: var(--accent); text-weight: 600; }

/* Table Styles */
.table-responsive { overflow-x: auto; margin: 20px 0; }
.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}
.data-table th, .data-table td {
    padding: 12px 15px;
    border: 1px solid var(--border-color);
}
.data-table th { background: #f9fafb; color: var(--primary); }
.status-ok { color: #059669; font-weight: 600; }
.status-alert { color: #d97706; font-weight: 600; }

/* Tip Box & FAQ */
.tip-box {
    background: #fffbeb;
    border-left: 4px solid var(--accent);
    padding: 15px 20px;
    margin: 25px 0;
    border-radius: 0 8px 8px 0;
}
.faq-item {
    background: #f9fafb;
    padding: 15px 20px;
    border-radius: 8px;
    margin-top: 10px;
}

/* Sidebar CTA Card */
.sidebar { position: sticky; top: 90px; height: fit-content; }
.cta-card {
    background: #fff;
    border: 2px solid var(--accent);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(217, 119, 6, 0.1);
}
.cta-badge { background: var(--accent); color: #fff; font-size: 0.75rem; padding: 4px 8px; border-radius: 4px; font-weight: 700; }
.cta-card h3 { margin: 12px 0 8px 0; font-size: 1.2rem; }
.cta-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 15px; }
.btn-primary-block {
    display: block;
    text-align: center;
    background: var(--accent);
    color: #fff !important;
    text-decoration: none;
    padding: 12px;
    border-radius: 6px;
    font-weight: 600;
}

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