:root {
    /* Brand Palette */
    --primary-50:  #e0f7fa;
    --primary-100: #b2ebf2;
    --primary-200: #80deea;
    --primary-300: #4dd0e1;
    --primary-400: #26c6da;
    --primary-500: #00bcd4;
    --primary-600: #00acc1;
    --primary-700: #0097a7;
    --primary-800: #00838f;
    --primary-900: #006064;
    --gradient-start: #00bcd4;
    --gradient-end:   #0097a7;
    --accent-color:   #00e5ff;
    --dark-bg:  #0a1929;
    --light-bg: #f0fdff;
    --saloprimary: #00a5b8;

    /* Semantic tokens — Light Mode */
    --bg-primary:    #ffffff;
    --bg-secondary:  var(--light-bg);
    --bg-card:       #ffffff;
    --bg-navbar:     rgba(255,255,255,0.95);
    --text-primary:  #0a1929;
    --text-secondary:#4a6070;
    --text-muted:    #7a90a0;
    --border-color:  #e0f0f5;
    --shadow-sm:     0 2px 8px rgba(0,188,212,0.08);
    --shadow-md:     0 8px 32px rgba(0,188,212,0.12);
    --shadow-lg:     0 20px 60px rgba(0,188,212,0.16);
    --shadow-card:   0 4px 20px rgba(0,150,170,0.10);

    /* Typography */
    --font-display: 'Plus Jakarta Sans', sans-serif;
    --font-body:    'DM Sans', sans-serif;

    /* Spacing & Shape */
    --section-py: 2rem;
    --card-radius: 16px;
    --btn-radius:  10px;

    /* Transitions */
    --transition-fast:   0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow:   0.4s cubic-bezier(0.4,0,0.2,1);

    /* Gradients */
    --gradient-brand: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    --gradient-glow:  linear-gradient(135deg, rgba(0,188,212,0.15), rgba(0,151,167,0.05));
    --gradient-hero:  linear-gradient(135deg, #0a1929 0%, #013a4a 50%, #004d5a 100%);
    --gradient-card:  linear-gradient(145deg, rgba(0,188,212,0.05), rgba(255,255,255,0));
}

/* ============ Base ============ */
body {
    font-family: var(--font-body);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.95rem;
}
h1, h2, h3, h4, h5, h6, .navbar-brand, .page-title {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--text-primary);
}
.page-title { font-size: 1.35rem; display:flex; align-items:center; gap:.6rem; }
.page-title i { color: var(--primary-500); }

::selection { background: var(--primary-200); color: var(--dark-bg); }

a { color: var(--primary-700); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--primary-500); }
a.text-muted { color: var(--text-muted) !important; }

.logo-img {
    max-width: 260px !important;
}

/* ============ Layout & Sidebar ============ */
.app-wrapper { display: flex; min-height: 100vh; }

.sidebar {
    width: 260px; flex-shrink: 0; position: fixed; top: 0; bottom: 0; left: 0;
    background: var(--gradient-hero); color: #cfeef5; z-index: 1045;
    display: flex; flex-direction: column; transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
}
.sidebar-brand {
    padding: 1.25rem 1.25rem 1rem; display: flex; align-items: center; gap: .75rem;
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.sidebar-brand .logo-badge {
    width: 42px; height: 42px; border-radius: 12px; display:grid; place-items:center;
    background: var(--gradient-brand); color:#fff; font-size: 1.1rem; flex-shrink:0;
    box-shadow: 0 4px 14px rgba(0,188,212,.4);
}
.sidebar-brand span { font-family: var(--font-display); font-weight: 800; color:#fff; font-size: 1.05rem; line-height: 1.2; }
.sidebar-brand small { display:block; font-size:.7rem; color: var(--primary-300); font-weight: 500; letter-spacing: .5px; }

.sidebar-nav { flex: 1; overflow-y: auto; padding: 1rem .75rem 1.5rem; }
.sidebar-nav::-webkit-scrollbar { width: 5px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,.15); border-radius: 10px; }

.side-link {
    display: flex; align-items: center; gap: .7rem; padding: .65rem .85rem;
    border-radius: 10px; color: #b9dbe4; font-weight: 500; font-size: .9rem;
    transition: all var(--transition-fast); margin-bottom: 2px;
}
.side-link i:first-child { width: 20px; text-align: center; font-size: .95rem; }
.side-link:hover { background: rgba(0,188,212,.12); color: #fff; }
.side-link.active { background: var(--gradient-brand); color: #fff; box-shadow: 0 4px 14px rgba(0,188,212,.35); }
.side-link .arrow { margin-left: auto; font-size: .7rem; transition: transform var(--transition-fast); }

.side-menu { list-style: none; padding: 0; margin: 0; }
.side-sub {
    list-style: none; padding: 4px; margin: 2px 0 6px; background: rgba(0,0,0,.18);
    border-radius: 10px;
}
.side-sub .side-link { padding-left: 2.55rem; font-size: .85rem; color: #9fc9d4; }
.side-sub .side-link::before { content:""; width:6px; height:6px; border-radius:50%; background: var(--primary-400); position:absolute; left:1.4rem; opacity:.7; }
.side-sub .side-link { position: relative; }
.side-sub .side-link:hover { color:#fff; background: rgba(0,188,212,.15); }

.side-header { font-size: .68rem; text-transform: uppercase; letter-spacing: 1.5px; color: rgba(178,235,242,.45); padding: 1rem .85rem .4rem; font-weight: 700; }

/* Sidebar açıkken ok işaretleri */
.side-link[aria-expanded="true"] .arrow { transform: rotate(90deg); color: var(--accent-color); }

.sidebar-footer { padding: 1rem 1.25rem; border-top: 1px solid rgba(255,255,255,.08); display:flex; align-items:center; gap:.7rem; }
.sidebar-footer img { width: 38px; height: 38px; border-radius: 50%; border: 2px solid var(--primary-400); object-fit: cover; }
.sidebar-footer .name { color:#fff; font-size:.85rem; font-weight:600; line-height:1.2; }
.sidebar-footer .role { font-size:.72rem; color: var(--primary-300); }

/* ============ Main / Topbar ============ */
.main-content { flex: 1; margin-left: 260px; min-width: 0; display: flex; flex-direction: column; }
.topbar {
    height: 64px; background: var(--bg-navbar); backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color); display:flex; align-items:center;
    gap: 1rem; padding: 0 1.5rem; position: sticky; top: 0; z-index: 1030;
}
.topbar .btn-icon {
    width: 40px; height: 40px; border-radius: 10px; display:grid; place-items:center;
    border: 1px solid var(--border-color); background: #fff; color: var(--text-secondary); transition: all var(--transition-fast);
}
.topbar .btn-icon:hover { color: var(--primary-600); border-color: var(--primary-300); background: var(--primary-50); }
.content-area { padding: 1.75rem; flex: 1; }

/* Mobil: Sidebar gizli */
.sidebar-backdrop { display:none; position:fixed; inset:0; background:rgba(10,25,41,.5); z-index:1044; opacity:0; transition:opacity var(--transition-normal); }
@media (max-width: 991.98px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.show { transform: translateX(0); }
    .sidebar-backdrop.show { display:block; opacity:1; }
    .main-content { margin-left: 0; }
    .content-area { padding: 1rem; }
}

/* ============ Cards ============ */
.card {
    border: 1px solid var(--border-color); border-radius: var(--card-radius);
    box-shadow: var(--shadow-card); background: var(--bg-card); overflow: hidden;
}
.card-header {
    background: #fff; border-bottom: 1px solid var(--border-color); padding: 1rem 1.25rem;
    display:flex; align-items:center; gap:.6rem; font-weight: 700; font-family: var(--font-display); font-size:.95rem;
}
.card-header i { color: var(--primary-500); }
.stat-card { transition: transform var(--transition-fast), box-shadow var(--transition-fast); }
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.stat-icon {
    width: 52px; height: 52px; border-radius: 14px; display:grid; place-items:center;
    font-size: 1.25rem; color:#fff; flex-shrink:0;
}
.stat-value { font-family: var(--font-display); font-size: 1.6rem; font-weight: 800; }
.stat-label { color: var(--text-muted); font-size: .82rem; }

/* ============ Butonlar ============ */
.btn { border-radius: var(--btn-radius); font-weight: 600; font-size: .88rem; padding: .5rem 1.1rem; transition: all var(--transition-fast); }
.btn i { margin-right: .35rem; }
.btn:last-child i { margin-right: 0; }

.btn-primary { background: var(--gradient-brand); border: none; color:#fff; box-shadow: 0 4px 14px rgba(0,188,212,.35); }
.btn-primary:hover, .btn-primary:focus { background: linear-gradient(135deg, var(--primary-400), var(--primary-600)); color:#fff; transform: translateY(-1px); box-shadow: 0 6px 18px rgba(0,188,212,.45); }

.btn-outline-primary { border: 1.5px solid var(--primary-400); color: var(--primary-600); background:#fff; }
.btn-outline-primary:hover, .btn-outline-primary:focus { background: var(--primary-50); border-color: var(--primary-500); color: var(--primary-700); }

.btn-secondary { background: #eef7fa; border: 1px solid var(--border-color); color: var(--text-secondary); }
.btn-secondary:hover { background: var(--primary-50); color: var(--primary-700); border-color: var(--primary-200); }

.btn-success { background: linear-gradient(135deg,#00c9a7,#009e82); border:none; color:#fff; box-shadow: 0 4px 14px rgba(0,201,167,.3); }
.btn-success:hover { color:#fff; filter: brightness(1.05); transform: translateY(-1px); }

.btn-warning { background: linear-gradient(135deg,#ffb300,#f57c00); border:none; color:#fff; box-shadow: 0 4px 14px rgba(255,179,0,.3); }
.btn-warning:hover { color:#fff; filter: brightness(1.05); }

.btn-danger { background: linear-gradient(135deg,#ff5c6c,#e0244a); border:none; color:#fff; box-shadow: 0 4px 14px rgba(224,36,74,.3); }
.btn-danger:hover { color:#fff; filter: brightness(1.05); transform: translateY(-1px); }

.btn-info { background: linear-gradient(135deg,#40c4ff,#0091ea); border:none; color:#fff; }
.btn-dark { background: var(--dark-bg); border:none; }
.btn-dark:hover { background: #12263f; color:#fff; }
.btn-light { background:#fff; border:1px solid var(--border-color); color: var(--text-secondary); }

.btn-sm { padding: .32rem .8rem; font-size: .8rem; }

.btn-soft-primary   { background: var(--primary-50);  color: var(--primary-700); }
.btn-soft-primary:hover   { background: var(--primary-100); color: var(--primary-800); }
.btn-soft-success   { background: #e0f9f3; color:#00806b; }
.btn-soft-warning   { background: #fff4e0; color:#b26a00; }
.btn-soft-danger    { background: #ffe9ec; color:#c2183a; }
.btn-soft-info      { background: #e3f5ff; color:#0076c6; }

/* ============ Formlar ============ */
.form-label { font-weight: 600; font-size: .85rem; color: var(--text-secondary); margin-bottom: .35rem; }
.form-label.required::after { content:" *"; color:#e0244a; }
.form-control, .form-select, .form-check-input {
    border-radius: var(--btn-radius); border: 1.5px solid var(--border-color);
    padding: .55rem .9rem; font-size: .9rem; color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-control:focus, .form-select:focus {
    border-color: var(--primary-400); box-shadow: 0 0 0 4px rgba(0,188,212,.15); background:#fff;
}
.form-control::placeholder { color: var(--text-muted); opacity:.8; }
.input-group-text { background: var(--primary-50); border: 1.5px solid var(--border-color); border-radius: var(--btn-radius); color: var(--primary-700); }
.input-group > .form-control:not(:first-child), .input-group > .form-select:not(:first-child) { border-top-left-radius: 0; border-bottom-left-radius: 0; }
.input-group > .input-group-text:first-child { border-top-right-radius: 0; border-bottom-right-radius: 0; }
.form-check-input:checked { background-color: var(--primary-500); border-color: var(--primary-500); }
.form-check-input:focus { box-shadow: 0 0 0 4px rgba(0,188,212,.15); }
.form-text { font-size: .78rem; color: var(--text-muted); }

/* ============ Tablolar ============ */
.table { --bs-table-bg: transparent; margin-bottom: 0; }
.table thead th {
    background: var(--primary-50); color: var(--primary-800); font-size: .78rem;
    text-transform: uppercase; letter-spacing: .6px; font-weight: 700; border-bottom: 2px solid var(--primary-200);
    padding: .85rem 1rem; white-space: nowrap;
}
.table tbody td { padding: .8rem 1rem; vertical-align: middle; font-size: .88rem; color: var(--text-secondary); border-color: var(--border-color); }
.table-hover tbody tr { transition: background var(--transition-fast); }
.table-hover tbody tr:hover { background: var(--primary-50); }
.table .badge { font-weight: 600; }

/* ============ Badge & Etiketler ============ */
.badge { border-radius: 8px; padding: .4em .7em; font-size: .72rem; font-weight: 600; }
.badge-soft-primary { background: var(--primary-50); color: var(--primary-700); }
.badge-soft-success { background: #e0f9f3; color: #00806b; }
.badge-soft-warning { background: #fff4e0; color: #b26a00; }
.badge-soft-danger  { background: #ffe9ec; color: #c2183a; }
.badge-soft-info    { background: #e3f5ff; color: #0076c6; }
.badge-soft-dark    { background: #e6ecf2; color: var(--dark-bg); }

.avatar-circle {
    width: 38px; height: 38px; border-radius: 50%; display: inline-grid; place-items:center;
    font-weight: 700; font-size: .8rem; color:#fff; flex-shrink:0; font-family: var(--font-display);
}

/* ============ Diğer bileşenler ============ */
.breadcrumb-item a { color: var(--text-muted); }
.breadcrumb-item.active { color: var(--primary-600); font-weight:600; }
.breadcrumb-item + .breadcrumb-item::before { color: var(--text-muted); }

.pagination .page-link { border:1px solid var(--border-color); color: var(--primary-700); font-weight:600; border-radius:8px; margin:0 2px; }
.pagination .page-item.active .page-link { background: var(--gradient-brand); border:none; box-shadow: 0 4px 10px rgba(0,188,212,.3); }
.pagination .page-link:hover { background: var(--primary-50); }

.dropdown-menu { border: 1px solid var(--border-color); border-radius: 12px; box-shadow: var(--shadow-md); font-size:.88rem; }
.dropdown-item { color: var(--text-secondary); }
.dropdown-item:hover { background: var(--primary-50); color: var(--primary-700); }
.dropdown-item i { width:18px; text-align:center; color: var(--primary-500); }

.alert { border-radius: 12px; border:none; font-size:.88rem; }
.alert-primary { background: var(--primary-50); color: var(--primary-800); }
.alert-success { background:#e0f9f3; color:#006b58; }
.alert-warning { background:#fff4e0; color:#8a5200; }
.alert-danger  { background:#ffe9ec; color:#9e1030; }

.modal-content { border:none; border-radius: var(--card-radius); box-shadow: var(--shadow-lg); }
.modal-header { border-bottom:1px solid var(--border-color); }
.modal-footer { border-top:1px solid var(--border-color); }

.progress { background: var(--primary-50); border-radius: 20px; }
.progress-bar { background: var(--gradient-brand); border-radius: 20px; }

.nav-pills .nav-link { color: var(--text-secondary); font-weight:600; border-radius:10px; }
.nav-pills .nav-link.active { background: var(--gradient-brand); box-shadow: 0 4px 12px rgba(0,188,212,.3); }

.text-primary { color: var(--primary-600) !important; }
.bg-brand { background: var(--gradient-brand) !important; }
.text-gradient { background: var(--gradient-brand); -webkit-background-clip:text; background-clip:text; color:transparent; }

.search-box { position: relative; max-width: 320px; }
.search-box i { position:absolute; left: .9rem; top:50%; transform:translateY(-50%); color: var(--text-muted); font-size:.85rem; }
.search-box .form-control { padding-left: 2.4rem; border-radius: 30px; background: var(--bg-secondary); }
.search-box .form-control:focus { background:#fff; }

/* Sidebar bildirim rozeti */
.side-link .count {
    margin-left: auto; background: var(--gradient-brand); color:#fff; font-size:.65rem;
    font-weight:700; padding: .15em .5em; border-radius: 20px; box-shadow: 0 2px 8px rgba(0,188,212,.4);
}
.side-link[aria-expanded="true"] { background: rgba(0,188,212,.10); color:#fff; }