/* YENİ Forum — tema değişkenleri (Faz 9) */

:root,
[data-theme="dark"] {
    --bg: #0f1419;
    --surface: #1a2332;
    --surface-elevated: #243044;
    --border: #2d3a4f;
    --text: #e7ecf3;
    --muted: #8b9cb3;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #22c55e;
    --danger: #f87171;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
    --header-bg: rgba(26, 35, 50, 0.92);
}

[data-theme="light"] {
    --bg: #f4f6f9;
    --surface: #ffffff;
    --surface-elevated: #f8fafc;
    --border: #e2e8f0;
    --text: #0f172a;
    --muted: #64748b;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --success: #16a34a;
    --danger: #dc2626;
    --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
    --header-bg: rgba(255, 255, 255, 0.92);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.header {
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1.25rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 1040px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.02em;
}

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

.badge {
    font-size: 0.7rem;
    background: rgba(59, 130, 246, 0.12);
    color: var(--accent);
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    border: 1px solid rgba(59, 130, 246, 0.25);
}

.nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.nav a, .nav button {
    font-size: 0.875rem;
    color: var(--muted);
    text-decoration: none;
}

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

.nav-user {
    color: var(--text);
    font-weight: 600;
    font-size: 0.875rem;
}

.nav form { display: inline; }

.nav .btn-ghost,
.theme-toggle {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.35rem 0.65rem;
    cursor: pointer;
    font-size: 0.85rem;
    line-height: 1.2;
}

.nav .btn-ghost:hover,
.theme-toggle:hover { color: var(--text); border-color: var(--accent); }

.theme-toggle { display: inline-flex; align-items: center; gap: 0.35rem; }

.nav-badge {
    display: inline-block;
    min-width: 1.1rem;
    padding: 0.05rem 0.35rem;
    margin-left: 0.2rem;
    font-size: 0.7rem;
    font-weight: 700;
    background: var(--accent);
    color: #fff;
    border-radius: 999px;
    text-align: center;
}

.flash {
    max-width: 1040px;
    margin: 1rem auto 0;
    padding: 0 1.25rem;
}

.flash .alert {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    margin: 0;
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: var(--success);
}

.alert-error {
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid rgba(248, 113, 113, 0.3);
    color: var(--danger);
}

main {
    max-width: 1040px;
    margin: 0 auto;
    padding: 2rem 1.25rem 3rem;
}

footer {
    text-align: center;
    padding: 2rem 1.25rem;
    color: var(--muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

@media (max-width: 640px) {
    .header-inner { flex-direction: column; align-items: flex-start; }
    .nav { width: 100%; }
    main { padding-top: 1.25rem; }
}