/* ═══════════════════════════════════════════
   NetsisIK - Design System
   ═══════════════════════════════════════════ */
:root {
    --bg-primary: #0f1117;
    --bg-secondary: #161922;
    --bg-card: #1c1f2e;
    --bg-hover: #242838;
    --bg-input: #1a1d2d;
    --border: #2a2e3f;
    --border-hover: #3d4258;
    --text-primary: #e8eaf0;
    --text-secondary: #8b90a5;
    --text-muted: #5c6078;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.15);
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.1);
    --netsis: #f97316;
    --netsis-bg: rgba(249, 115, 22, 0.12);
    --uyumsoft: #8b5cf6;
    --uyumsoft-bg: rgba(139, 92, 246, 0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 6px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-width: 260px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
    height: 100vh;
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* ─── LOGIN SCREEN ─── */
.login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0f1117 0%, #1a1040 50%, #0f1117 100%);
    position: relative;
    overflow: hidden;
}
.login-screen::before {
    content: '';
    position: absolute;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    top: -200px; right: -200px;
    border-radius: 50%;
    animation: pulse 6s ease-in-out infinite;
}
.login-screen::after {
    content: '';
    position: absolute;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.06) 0%, transparent 70%);
    bottom: -150px; left: -100px;
    border-radius: 50%;
    animation: pulse 8s ease-in-out infinite reverse;
}
@keyframes pulse { 0%, 100% { transform: scale(1); opacity: 0.5; } 50% { transform: scale(1.1); opacity: 1; } }

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 48px 40px;
    width: 420px;
    max-width: 95vw;
    box-shadow: var(--shadow-lg);
    z-index: 1;
    animation: slideUp 0.5s ease-out;
}
@keyframes slideUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }

.login-logo {
    text-align: center;
    margin-bottom: 36px;
}
.logo-icon {
    font-size: 48px;
    color: var(--accent);
    display: block;
    margin-bottom: 12px;
}
.login-logo h1 {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--uyumsoft));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}
.login-logo p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 4px;
}

.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.input-wrapper {
    display: flex;
    align-items: center;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0 14px;
    transition: var(--transition);
}
.input-wrapper:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
.input-wrapper .material-icons-round {
    font-size: 20px;
    color: var(--text-muted);
    margin-right: 10px;
}
.input-wrapper input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 14px;
    padding: 12px 0;
    font-family: inherit;
}
.input-wrapper input::placeholder { color: var(--text-muted); }

.error-msg {
    background: var(--danger-bg);
    color: var(--danger);
    padding: 10px 14px;
    border-radius: var(--radius-xs);
    font-size: 13px;
    margin-top: 16px;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ─── BUTTONS ─── */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--accent), #4f46e5);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}
.btn-primary:hover { background: linear-gradient(135deg, var(--accent-hover), #5b52f0); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-full { width: 100%; justify-content: center; }
.btn-lg { padding: 16px 32px; font-size: 16px; border-radius: var(--radius); }

.btn-secondary {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--bg-hover); color: var(--text-primary); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 10px 20px; font-size: 14px; font-weight: 500;
    cursor: pointer; transition: var(--transition); font-family: inherit;
}
.btn-secondary:hover { border-color: var(--border-hover); background: var(--border); }

.btn-icon {
    display: flex; align-items: center; justify-content: center;
    background: none; border: none; color: var(--text-secondary);
    cursor: pointer; padding: 8px; border-radius: var(--radius-xs);
    transition: var(--transition);
}
.btn-icon:hover { color: var(--text-primary); background: var(--bg-hover); }

/* ─── APP LAYOUT ─── */
.app { display: flex; height: 100vh; }
.hidden { display: none !important; }

/* ─── SIDEBAR ─── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 100;
    transition: var(--transition);
}
.sidebar-header {
    display: flex; align-items: center; gap: 12px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}
.logo-icon-sm {
    font-size: 28px; color: var(--accent);
}
.sidebar-title {
    font-size: 20px; font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--uyumsoft));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.sidebar-nav { flex: 1; padding: 12px; overflow-y: auto; }
.nav-item {
    display: flex; align-items: center; gap: 12px;
    padding: 11px 16px; border-radius: var(--radius-sm);
    color: var(--text-secondary); text-decoration: none;
    font-size: 14px; font-weight: 500; transition: var(--transition);
    margin-bottom: 2px;
}
.nav-item:hover { color: var(--text-primary); background: var(--bg-hover); }
.nav-item.active {
    color: var(--accent); background: var(--accent-glow);
    font-weight: 600;
}
.nav-item .material-icons-round { font-size: 22px; }

.sidebar-footer {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px; border-top: 1px solid var(--border);
}
.user-info { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-secondary); }

/* ─── MAIN CONTENT ─── */
.main-content { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

.top-bar {
    display: flex; align-items: center; gap: 16px;
    padding: 16px 28px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
    flex-shrink: 0;
}
.top-bar h2 { font-size: 18px; font-weight: 700; flex: 1; }
.mobile-menu { display: none; }

.connection-badge {
    display: flex; align-items: center; gap: 6px;
    padding: 6px 14px; border-radius: 20px;
    font-size: 12px; font-weight: 500;
}
.connection-badge .dot {
    width: 8px; height: 8px; border-radius: 50%;
}
.connection-badge.online { background: var(--success-bg); color: var(--success); }
.connection-badge.online .dot { background: var(--success); box-shadow: 0 0 6px var(--success); }
.connection-badge.offline { background: var(--danger-bg); color: var(--danger); }
.connection-badge.offline .dot { background: var(--danger); }

/* ─── PAGES ─── */
.page { display: none; padding: 24px 28px; overflow-y: auto; flex: 1; }
.page.active { display: block; }

/* ─── STATS GRID ─── */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.stat-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px;
    display: flex; align-items: center; gap: 16px;
    transition: var(--transition);
}
.stat-card:hover { border-color: var(--border-hover); transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-icon {
    width: 48px; height: 48px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
}
.stat-icon .material-icons-round { font-size: 24px; }
.stat-icon.netsis { background: var(--netsis-bg); color: var(--netsis); }
.stat-icon.active { background: var(--success-bg); color: var(--success); }
.stat-icon.uyumsoft { background: var(--uyumsoft-bg); color: var(--uyumsoft); }
.stat-icon.synced { background: var(--info-bg); color: var(--info); }
.stat-value { font-size: 28px; font-weight: 800; display: block; line-height: 1.1; }
.stat-label { font-size: 12px; color: var(--text-secondary); font-weight: 500; text-transform: uppercase; letter-spacing: 0.5px; }

/* ─── CARDS ─── */
.card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); overflow: hidden;
}
.card-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px; border-bottom: 1px solid var(--border);
}
.card-header h3 { font-size: 15px; font-weight: 600; display: flex; align-items: center; gap: 8px; }
.card-header h3 .material-icons-round { font-size: 20px; color: var(--accent); }
.card-body { padding: 20px; }

.content-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* ─── QUICK ACTIONS ─── */
.quick-actions { display: flex; flex-direction: column; gap: 10px; }
.action-btn {
    display: flex; align-items: center; gap: 14px;
    background: var(--bg-hover); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 14px 18px;
    cursor: pointer; transition: var(--transition); text-align: left;
    color: var(--text-primary); font-family: inherit;
}
.action-btn:hover { border-color: var(--accent); background: var(--accent-glow); }
.action-btn .material-icons-round { font-size: 24px; color: var(--accent); }
.action-btn strong { font-size: 14px; display: block; }
.action-btn small { font-size: 12px; color: var(--text-secondary); }
.action-btn.secondary .material-icons-round { color: var(--uyumsoft); }

/* ─── DATA TABLE ─── */
.table-container { overflow-x: auto; padding: 0; }
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table thead th {
    padding: 12px 16px; text-align: left;
    font-weight: 600; font-size: 12px;
    color: var(--text-secondary); text-transform: uppercase;
    letter-spacing: 0.5px; border-bottom: 1px solid var(--border);
    background: var(--bg-secondary); position: sticky; top: 0; z-index: 1;
}
.data-table tbody td {
    padding: 11px 16px; border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}
.data-table tbody tr { transition: var(--transition); }
.data-table tbody tr:hover { background: var(--bg-hover); }

.loading, .empty-state {
    text-align: center; color: var(--text-muted); padding: 40px !important;
    font-style: italic;
}
.loading-spinner { text-align: center; color: var(--text-muted); padding: 20px; }

/* ─── BADGES ─── */
.badge {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 10px; border-radius: 20px;
    font-size: 11px; font-weight: 600; text-transform: uppercase;
}
.badge.success { background: var(--success-bg); color: var(--success); }
.badge.danger { background: var(--danger-bg); color: var(--danger); }
.badge.warning { background: var(--warning-bg); color: var(--warning); }
.badge.info { background: var(--info-bg); color: var(--info); }
.badge.netsis { background: var(--netsis-bg); color: var(--netsis); }
.badge.uyumsoft { background: var(--uyumsoft-bg); color: var(--uyumsoft); }

/* ─── TABS ─── */
.page-actions {
    display: flex; align-items: center; gap: 16px;
    margin-bottom: 16px; flex-wrap: wrap;
}
.tab-group { display: flex; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.tab {
    padding: 10px 20px; border: none; background: none;
    color: var(--text-secondary); font-size: 13px; font-weight: 600;
    cursor: pointer; transition: var(--transition); font-family: inherit;
}
.tab:hover { color: var(--text-primary); }
.tab.active { background: var(--accent); color: white; }

.search-box {
    display: flex; align-items: center; gap: 8px;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 0 14px; flex: 1; max-width: 360px;
}
.search-box .material-icons-round { color: var(--text-muted); font-size: 20px; }
.search-box input {
    flex: 1; background: none; border: none; outline: none;
    color: var(--text-primary); font-size: 13px; padding: 10px 0; font-family: inherit;
}

/* ─── SYNC ─── */
.sync-direction-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 24px; }
.sync-card {
    background: var(--bg-hover); border: 2px solid var(--border);
    border-radius: var(--radius); padding: 24px; text-align: center;
    cursor: pointer; transition: var(--transition);
}
.sync-card:hover { border-color: var(--accent); }
.sync-card.selected { border-color: var(--accent); background: var(--accent-glow); }
.sync-card .material-icons-round { font-size: 36px; color: var(--accent); margin-bottom: 10px; }
.sync-card h4 { font-size: 15px; margin-bottom: 6px; }
.sync-card p { font-size: 12px; color: var(--text-secondary); }
.sync-actions { text-align: center; }

/* ─── COMPARE STATS ─── */
.compare-stats { display: flex; gap: 12px; }

/* ─── LOG LIST ─── */
.log-list { display: flex; flex-direction: column; gap: 8px; max-height: 400px; overflow-y: auto; }
.log-item {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 14px; border-radius: var(--radius-xs);
    background: var(--bg-hover); border: 1px solid var(--border);
    font-size: 13px;
}
.log-item .log-icon { font-size: 18px; }
.log-item .log-text { flex: 1; }
.log-item .log-date { font-size: 11px; color: var(--text-muted); }

/* ─── SYNC RESULT ─── */
.sync-progress { margin-bottom: 16px; }
.progress-bar {
    height: 8px; background: var(--bg-hover); border-radius: 4px; overflow: hidden;
}
.progress-fill {
    height: 100%; border-radius: 4px;
    background: linear-gradient(90deg, var(--accent), var(--success));
    transition: width 0.5s ease;
}
.result-stats {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 16px 0;
}
.result-stat {
    text-align: center; padding: 12px; border-radius: var(--radius-sm);
    background: var(--bg-hover);
}
.result-stat .value { font-size: 24px; font-weight: 800; display: block; }
.result-stat .label { font-size: 11px; color: var(--text-secondary); text-transform: uppercase; }

/* ─── TOAST ─── */
#toast-container { position: fixed; top: 20px; right: 20px; z-index: 10000; display: flex; flex-direction: column; gap: 8px; }
.toast {
    padding: 14px 20px; border-radius: var(--radius-sm);
    font-size: 13px; font-weight: 500;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease-out;
    display: flex; align-items: center; gap: 10px;
    max-width: 400px;
}
.toast.success { background: #065f46; color: #6ee7b7; border: 1px solid rgba(110, 231, 183, 0.2); }
.toast.error { background: #7f1d1d; color: #fca5a5; border: 1px solid rgba(252, 165, 165, 0.2); }
.toast.info { background: #1e3a5f; color: #93c5fd; border: 1px solid rgba(147, 197, 253, 0.2); }
@keyframes toastIn { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }

/* ─── MODAL ─── */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.7); backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center;
    z-index: 1000;
}
.modal {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); width: 600px; max-width: 95vw;
    max-height: 80vh; overflow-y: auto;
    animation: slideUp 0.3s ease-out;
}
.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px; border-bottom: 1px solid var(--border);
}
.modal-body { padding: 20px; }

/* ─── SETTINGS FORM ─── */
.setting-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 0; border-bottom: 1px solid var(--border);
}
.setting-item:last-child { border-bottom: none; }
.setting-label { font-size: 14px; font-weight: 500; }
.setting-desc { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.setting-value {
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-xs); padding: 8px 12px;
    color: var(--text-primary); font-size: 13px; font-family: inherit;
    min-width: 180px; text-align: right;
}

/* ─── SELECTION BAR ─── */
.selection-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(139, 92, 246, 0.08));
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius);
    margin-bottom: 16px;
    animation: slideUp 0.25s ease-out;
}
.selection-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-hover);
}
.selection-info .material-icons-round {
    font-size: 22px;
    color: var(--accent);
}
.selection-actions {
    display: flex;
    gap: 10px;
}

/* ─── CHECKBOX ─── */
.th-checkbox { width: 40px; text-align: center !important; }
.td-checkbox { width: 40px; text-align: center; }

.data-table input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
    border-radius: 3px;
}

.data-table tbody tr.selected {
    background: rgba(99, 102, 241, 0.08) !important;
    border-left: 3px solid var(--accent);
}
.data-table tbody tr.selected td:first-child {
    padding-left: 13px;
}


/* ─── ACCOUNTING / MUHASEBE FİŞ ─── */
.accounting-layout { grid-template-columns: 1.2fr 0.8fr; }

.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 40px 24px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-hover);
}
.upload-zone:hover { border-color: var(--accent); background: var(--accent-glow); }
.upload-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-glow);
    transform: scale(1.01);
}
.upload-zone.uploading {
    opacity: 0.6;
    pointer-events: none;
}
.upload-zone .upload-icon {
    font-size: 48px;
    color: var(--accent);
    display: block;
    margin-bottom: 12px;
}
.upload-zone p { color: var(--text-secondary); font-size: 14px; margin-bottom: 8px; }
.upload-zone small { color: var(--text-muted); font-size: 12px; display: block; margin-bottom: 12px; }
.upload-btn {
    cursor: pointer;
    display: inline-flex !important;
}
.file-name-display {
    margin-top: 12px;
    font-size: 13px;
    color: var(--accent-hover);
    font-weight: 500;
}

/* Voucher Preview Table */
#voucher-preview-table code {
    background: var(--bg-secondary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    color: var(--accent-hover);
}
.row-invalid { background: var(--danger-bg) !important; }
.text-danger { color: var(--danger) !important; }

/* Voucher Summary */
.voucher-summary {
    background: var(--bg-hover);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-bottom: 20px;
}
.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}
.summary-row:last-child { border-bottom: none; }
.summary-value { font-weight: 700; }
.summary-balance { font-size: 15px; padding-top: 10px; }
.summary-balance.balanced { color: var(--success); }
.summary-balance.unbalanced { color: var(--danger); }

/* Voucher List */
.voucher-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 400px;
    overflow-y: auto;
}
.voucher-item {
    background: var(--bg-hover);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    padding: 12px 14px;
    transition: var(--transition);
}
.voucher-item:hover { border-color: var(--border-hover); }
.voucher-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}
.voucher-no {
    font-weight: 600;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-hover);
}
.voucher-date { font-size: 11px; color: var(--text-muted); }
.voucher-item-body {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.voucher-note { font-size: 12px; color: var(--text-secondary); flex: 1; }
.voucher-amounts {
    display: flex;
    gap: 12px;
    font-size: 12px;
    font-weight: 600;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .content-grid, .settings-grid, .accounting-layout { grid-template-columns: 1fr; }
    .sync-direction-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .sidebar { position: fixed; left: -280px; height: 100vh; z-index: 200; }
    .sidebar.open { left: 0; box-shadow: var(--shadow-lg); }
    .mobile-menu { display: flex; }
    .page { padding: 16px; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}