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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --sidebar-bg: #1e293b;
    --sidebar-text: #94a3b8;
    --sidebar-active: #2563eb;
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-muted: #64748b;
    --danger: #ef4444;
    --success: #22c55e;
}

body { font-family: 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); }

/* AUTH PAGES */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e293b 0%, #2563eb 100%);
}

.auth-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 40px;
    width: 380px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.auth-card h1 { font-size: 24px; margin-bottom: 8px; }
.auth-card p { color: var(--text-muted); margin-bottom: 28px; font-size: 14px; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.form-group input {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s;
    outline: none;
}
.form-group input:focus { border-color: var(--primary); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, opacity 0.2s;
}
.btn-primary { background: var(--primary); color: #fff; width: 100%; padding: 12px; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { background: #cbd5e1; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.85; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.alert {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 16px;
    display: none;
}
.alert-error { background: #fee2e2; color: #dc2626; border: 1px solid #fca5a5; }
.alert-success { background: #dcfce7; color: #16a34a; border: 1px solid #86efac; }
.alert.show { display: block; }

/* QR CODE */
.qr-container { text-align: center; margin: 20px 0; }
.qr-container img { border: 4px solid var(--border); border-radius: 8px; }
.secret-box {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px;
    font-family: monospace;
    font-size: 13px;
    text-align: center;
    margin: 12px 0;
    letter-spacing: 1px;
    user-select: all;
}

/* LAYOUT */
.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: 240px;
    background: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-logo {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-logo h2 { color: #fff; font-size: 18px; font-weight: 700; }
.sidebar-logo span { color: var(--sidebar-text); font-size: 12px; }

.sidebar-nav { flex: 1; padding: 16px 0; }
.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}
.nav-item:hover { color: #fff; background: rgba(255,255,255,0.05); }
.nav-item.active { color: #fff; background: rgba(37,99,235,0.2); border-left-color: var(--primary); }
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

.topbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 16px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.topbar h1 { font-size: 20px; font-weight: 700; }
.topbar-right { display: flex; align-items: center; gap: 12px; }

.content { padding: 28px; flex: 1; overflow-y: auto; }

/* CARD */
.card {
    background: var(--card-bg);
    border-radius: 10px;
    border: 1px solid var(--border);
    padding: 24px;
    margin-bottom: 20px;
}
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.card-title { font-size: 16px; font-weight: 700; }

/* TABLE */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th {
    text-align: left;
    padding: 10px 14px;
    background: var(--bg);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}
td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: #f8fafc; }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}
.badge-success { background: #dcfce7; color: #15803d; }
.badge-danger { background: #fee2e2; color: #dc2626; }
.badge-info { background: #dbeafe; color: #1d4ed8; }

/* MODAL */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    display: none;
}
.modal-overlay.open { display: flex; }
.modal {
    background: var(--card-bg);
    border-radius: 12px;
    width: 560px;
    max-width: 95vw;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 80px rgba(0,0,0,0.3);
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 16px; font-weight: 700; }
.modal-close { background: none; border: none; cursor: pointer; color: var(--text-muted); font-size: 20px; line-height: 1; }
.modal-close:hover { color: var(--text); }
.modal-body { padding: 24px; }
.modal-footer {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    padding: 16px 24px;
    border-top: 1px solid var(--border);
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-row.cols-3 { grid-template-columns: 1fr 1fr 1fr; }

select {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    background: #fff;
    outline: none;
    cursor: pointer;
}
select:focus { border-color: var(--primary); }

/* YETKILENDIRME */
.yetki-user-info {
    background: var(--bg);
    border-radius: 8px;
    padding: 14px 18px;
    margin-bottom: 20px;
    font-size: 14px;
}
.yetki-user-info strong { font-weight: 700; }

.sirket-block {
    border: 1.5px solid var(--border);
    border-radius: 10px;
    margin-bottom: 14px;
    overflow: hidden;
}
.sirket-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg);
    font-weight: 600;
    font-size: 14px;
}
.sirket-block-body { padding: 16px; }
.yazilim-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 10px;
}
.yazilim-check {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.15s;
}
.yazilim-check:hover { border-color: var(--primary); background: #eff6ff; }
.yazilim-check input { cursor: pointer; width: 16px; height: 16px; }
.yazilim-check.checked { border-color: var(--primary); background: #eff6ff; color: var(--primary); font-weight: 600; }

.add-sirket-row {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-top: 16px;
}
.add-sirket-row select { flex: 1; }

/* TOGGLE SWITCH */
.toggle-switch { position: relative; display: inline-block; width: 40px; height: 22px; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
    position: absolute; cursor: pointer; inset: 0;
    background: #cbd5e1; border-radius: 22px; transition: background 0.2s;
}
.toggle-slider:before {
    content: ''; position: absolute;
    width: 16px; height: 16px; left: 3px; bottom: 3px;
    background: #fff; border-radius: 50%; transition: transform 0.2s;
}
.toggle-switch input:checked + .toggle-slider { background: var(--success); }
.toggle-switch input:checked + .toggle-slider:before { transform: translateX(18px); }

/* FILTER */
.filter-input {
    padding: 7px 12px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 13px;
    outline: none;
    width: 200px;
    transition: border-color 0.2s;
}
.filter-input:focus { border-color: var(--primary); }

/* LOADING */
.loading { text-align: center; padding: 40px; color: var(--text-muted); font-size: 14px; }
.spinner {
    width: 24px; height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
    margin-right: 8px;
    vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* PAGE VIEWS */
.page-view { display: none; }
.page-view.active { display: block; }

/* TOAST */
#toast-container {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 99999;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    pointer-events: none;
}
.toast {
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    box-shadow: 0 8px 32px rgba(0,0,0,0.25);
    animation: slideDown 0.3s ease;
    white-space: nowrap;
}
.toast-success { background: #16a34a; }
.toast-error   { background: #dc2626; }
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-20px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeOut {
    to { opacity: 0; transform: translateY(-10px); }
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar { display: none; position: fixed; inset: 0; z-index: 50; width: 240px; }
    .sidebar.open { display: flex; }
    .sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 49; }
    .sidebar-overlay.open { display: block; }
    #btn-menu-toggle { display: flex !important; }
    .form-row { grid-template-columns: 1fr; }
    .form-row.cols-3 { grid-template-columns: 1fr; }
    .modal { width: 95vw !important; }
}