:root {
    --bg: #faf9f6;
    --card: #ffffff;
    --border: #e8e6e1;
    --text: #2c2c2c;
    --text-muted: #6b6b6b;
    --primary: #c8794a;
    --primary-hover: #b56a3d;
    --primary-light: #f4ebe3;
    --danger: #c44536;
    --danger-light: #fcebe9;
    --success: #5b8c5a;
    --success-light: #eaf3ea;
    --warning: #d4a017;
    --warning-light: #fbf3e0;
    --info: #4a6fa5;
    --info-light: #e8f0f9;
    --shadow: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.08);
    --radius: 8px;
    --radius-sm: 4px;
}

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

body {
    font-family: -apple-system, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

/* Layout */
.layout { display: flex; min-height: 100vh; }
.sidebar {
    width: 220px;
    background: var(--card);
    border-right: 1px solid var(--border);
    padding: 0;
    flex-shrink: 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}
.sidebar-header {
    padding: 20px 18px 16px;
    border-bottom: 1px solid var(--border);
}
.sidebar-header h1 {
    font-size: 20px;
    color: var(--primary);
    font-weight: 700;
    letter-spacing: -0.5px;
}
.sidebar-header p {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
}
.sidebar-nav { padding: 12px 0; }
.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 18px;
    color: var(--text);
    font-size: 13px;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: all 0.15s;
}
.sidebar-nav a:hover {
    background: var(--primary-light);
    color: var(--primary);
}
.sidebar-nav a.active {
    background: var(--primary-light);
    color: var(--primary);
    border-left-color: var(--primary);
}
.sidebar-nav .badge {
    margin-left: auto;
    background: var(--danger);
    color: white;
    font-size: 10px;
    padding: 2px 7px;
    border-radius: 10px;
    font-weight: 700;
}
.main {
    flex: 1;
    margin-left: 220px;
    padding: 28px 32px;
}
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.page-header h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); color: white; }
.btn-secondary { background: var(--card); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #f5f4f1; color: var(--text); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #a83a2e; color: white; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-block { width: 100%; justify-content: center; }

/* Cards */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}
.card-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.card-body { padding: 20px; }

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: box-shadow 0.15s, transform 0.15s;
}
.stat-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}
.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin: 4px 0;
}
.stat-card .stat-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.stat-card .stat-icon { font-size: 24px; opacity: 0.3; }

/* Tables */
table { width: 100%; border-collapse: collapse; }
.table-wrap { overflow-x: auto; }
th, td {
    padding: 10px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
th {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    font-weight: 600;
    background: #faf9f6;
}
tbody tr:hover { background: #faf9f6; }
td .badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
}
.badge-acik { background: var(--info-light); color: var(--info); }
.badge-beklemede { background: var(--warning-light); color: var(--warning); }
.badge-kapali { background: #f0f0f0; color: var(--text-muted); }
.badge-istinaf { background: var(--primary-light); color: var(--primary); }
.badge-odenmedi { background: var(--danger-light); color: var(--danger); }
.badge-odendi { background: var(--success-light); color: var(--success); }
.badge-kismi { background: var(--warning-light); color: var(--warning); }
.badge-bekliyor { background: var(--info-light); color: var(--info); }
.badge-tamamlandi { background: var(--success-light); color: var(--success); }
.badge-iptal { background: #f0f0f0; color: var(--text-muted); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.form-control {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    background: var(--card);
    color: var(--text);
    transition: border-color 0.15s;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}
textarea.form-control { min-height: 80px; resize: vertical; }
select.form-control { cursor: pointer; }
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.form-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 16px;
}

/* Flash messages */
.flash {
    padding: 12px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 13px;
    font-weight: 500;
}
.flash-success { background: var(--success-light); color: var(--success); }
.flash-error { background: var(--danger-light); color: var(--danger); }

/* Login */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
}
.login-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 36px 32px;
    width: 360px;
}
.login-card h1 {
    font-size: 26px;
    color: var(--primary);
    text-align: center;
    margin-bottom: 4px;
}
.login-card .subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 24px;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}
.empty-state .icon { font-size: 40px; opacity: 0.2; margin-bottom: 12px; }
.empty-state p { font-size: 14px; margin-bottom: 16px; }

/* Search */
.search-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}
.search-bar input {
    flex: 1;
    padding: 9px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--card);
}
.search-bar input:focus {
    outline: none;
    border-color: var(--primary);
}

/* Conflict warning */
.conflict-warning {
    background: var(--warning-light);
    border: 1px solid var(--warning);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    margin-bottom: 16px;
    font-size: 13px;
}
.conflict-warning strong { color: var(--warning); }

/* List items */
.list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}
.list-item:last-child { border-bottom: none; }
.list-item-title { font-weight: 600; font-size: 14px; }
.list-item-meta { font-size: 12px; color: var(--text-muted); }
.list-item-actions { display: flex; gap: 6px; }

/* Misc */
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 12px; }
.text-right { text-align: right; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 16px; }
.mt-2 { margin-top: 16px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-2 { gap: 8px; }
.d-flex { display: flex; }
.align-center { align-items: center; }

/* Responsive */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .main { margin-left: 0; padding: 16px; }
    .form-row, .form-row-3 { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}