/* --- MODERN YÖNETİM PANELİ TASARIMI (2025) --- */

/* 1. YAZI TİPİ VE TEMEL AYARLAR */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Renk Paleti: Kurumsal, Göz Yormayan Tonlar */
    --primary-color: #0f172a;       /* Çok koyu gri/mavi (Slate 900) - Ana Renk */
    --secondary-color: #334155;     /* Orta koyu gri (Slate 700) */
    --accent-color: #3b82f6;        /* Modern Mavi (Primary Action) */
    --accent-hover: #2563eb;
    --success-color: #10b981;       /* Yumuşak Yeşil */
    --warning-color: #f59e0b;       /* Sıcak Turuncu */
    --danger-color: #ef4444;        /* Modern Kırmızı */
    
    --bg-body: #f1f5f9;             /* Açık Gri Arkaplan (Slate 100) */
    --bg-card: #ffffff;             /* Kart Arkaplanı */
    --text-main: #1e293b;           /* Ana Metin Rengi */
    --text-muted: #64748b;          /* İkincil Metin Rengi */
    
    --sidebar-width: 260px;
    --border-radius: 12px;          /* Daha yumuşak köşeler */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    font-size: 0.925rem;
    line-height: 1.6;
}

a { text-decoration: none; color: inherit; transition: all 0.2s ease; }

/* 2. SIDEBAR (SOL MENÜ) */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background-color: #ffffff;
    color: var(--text-main);
    border-right: 1px solid #e2e8f0;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    overflow-y: auto;
    transition: all 0.3s ease;
    padding-top: 1rem;
}

.sidebar-header {
    padding: 1.5rem 1.5rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid #f1f5f9;
    margin-bottom: 1rem;
}

.sidebar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-link {
    color: var(--text-muted);
    padding: 0.85rem 1.5rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 12px;
    border-radius: 0;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}

.nav-link i { width: 20px; text-align: center; font-size: 1.1rem; }

.nav-link:hover {
    background-color: #f8fafc;
    color: var(--accent-color);
}

.nav-link.active {
    background-color: #eff6ff;
    color: var(--accent-color);
    border-left-color: var(--accent-color);
}

/* Küçük başlıklar (YÖNETİM vb.) */
.nav-item small {
    font-size: 0.7rem;
    letter-spacing: 1px;
    color: #475569;
    font-weight: 700;
    margin-top: 1.5rem;
    display: block;
    margin-bottom: 0.5rem;
}

/* 3. ANA İÇERİK ALANI */
.main-content {
    margin-left: var(--sidebar-width);
    transition: all 0.3s ease;
    width: calc(100% - var(--sidebar-width));
}

/* 4. NAVBAR (ÜST BAR) */
.navbar {
    background-color: var(--bg-card) !important;
    border-bottom: 1px solid #e2e8f0;
    padding: 0.75rem 2rem;
    height: 70px;
    display: flex;
    align-items: center;
}

.navbar h5 { font-weight: 600; color: var(--text-main); font-size: 1.1rem; }

/* 5. KARTLAR VE KUTULAR */
.card {
    background-color: var(--bg-card);
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
    overflow: hidden;
}

.card:hover { box-shadow: var(--shadow-md); }

.card-header {
    background-color: transparent;
    border-bottom: 1px solid #f1f5f9;
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-body { padding: 1.5rem; }

/* İstatistik Kartları */
.stat-card {
    display: flex;
    align-items: center;
    padding: 1.5rem;
}

.icon-box {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-right: 1rem;
}

/* Renk sınıfları */
.bg-soft-primary { background-color: #eff6ff; color: var(--accent-color); }
.bg-soft-success { background-color: #ecfdf5; color: var(--success-color); }
.bg-soft-warning { background-color: #fffbeb; color: var(--warning-color); }
.bg-soft-danger  { background-color: #fef2f2; color: var(--danger-color); }

/* 6. BUTONLAR */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s;
    border: none;
}

.btn-primary { background-color: var(--accent-color); color: white; }
.btn-primary:hover { background-color: var(--accent-hover); transform: translateY(-1px); }

.btn-light { background-color: #f8fafc; color: var(--text-main); border: 1px solid #e2e8f0; }
.btn-light:hover { background-color: #e2e8f0; }

.btn-outline-primary { border: 1px solid var(--accent-color); color: var(--accent-color); }
.btn-outline-primary:hover { background-color: var(--accent-color); color: white; }

/* 7. TABLO VE LİSTELER */
.table { margin-bottom: 0; }
.table th {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    color: var(--text-muted);
    background-color: #f8fafc;
    border-bottom: 1px solid #e2e8f0;
    padding: 1rem;
}
.table td {
    padding: 1rem;
    vertical-align: middle;
    color: var(--text-main);
    border-bottom: 1px solid #f1f5f9;
}

/* 8. FOOTER */
footer {
    background-color: var(--bg-card);
    border-top: 1px solid #e2e8f0;
    color: var(--text-muted);
    padding: 1.5rem;
    font-size: 0.85rem;
}

/* MOBİL UYUMLULUK */
@media (max-width: 768px) {
    .sidebar { margin-left: calc(-1 * var(--sidebar-width)); }
    .sidebar.active { margin-left: 0; }
    .main-content { margin-left: 0; width: 100%; }
}

/* --- 6. İÇERİK SEKMELERİ (TABS) DÜZELTMESİ --- */
/* Bu kod, sidebar dışındaki sekmelerin (Genel Bilgiler, Notlar vb.) görünümünü düzeltir */

.card .nav-tabs {
    border-bottom: 2px solid #e2e8f0;
}

.card .nav-tabs .nav-link {
    color: #64748b !important; /* Varsayılan yazı rengi (Gri) */
    background: transparent !important;
    border: none !important;
    border-bottom: 2px solid transparent !important;
    margin-bottom: -2px;
    padding: 1rem 1.5rem;
    font-weight: 500;
}

/* Mouse ile üzerine gelindiğinde (HOVER) */
.card .nav-tabs .nav-link:hover {
    color: var(--primary-color) !important; /* Yazı Rengi: Mavi */
    background-color: rgba(79, 70, 229, 0.04) !important; /* Arka Plan: Çok hafif mavi */
}

/* Seçili olan sekme (ACTIVE) */
.card .nav-tabs .nav-link.active {
    color: var(--primary-color) !important; /* Yazı Rengi: Mavi */
    border-bottom: 2px solid var(--primary-color) !important; /* Alt Çizgi: Mavi */
    background-color: transparent !important;
    font-weight: 600 !important;
}

/* --- AYARLAR SAYFASI SEKME DÜZELTMESİ --- */
#settingsTab .nav-link:hover {
    background-color: #e9ecef; /* Üzerine gelince açık gri arka plan */
    color: #0d6efd; /* Yazı rengini mavi/belirgin yap */
    transition: all 0.3s ease; /* Yumuşak geçiş efekti */
}

/* Aktif olan sekmenin bozulmaması için koruma */
#settingsTab .nav-link.active:hover {
    background-color: #0d6efd; /* Aktifken arka plan mavi kalsın */
    color: #fff; /* Yazı beyaz kalsın */
}