/* ============================================================
   ROOT VARIABLES
   ============================================================ */
:root {
    --navy: #0f172a;
    --navy-light: #1e293b;
    --navy-lighter: #334155;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    --orange: #f97316;
    --orange-dark: #ea580c;
    --orange-light: #fb923c;
    --orange-bg: #fff7ed;

    --blue: #3b82f6;
    --blue-dark: #2563eb;
    --blue-light: #60a5fa;
    --blue-bg: #eff6ff;

    --green: #22c55e;
    --green-dark: #16a34a;
    --green-bg: #f0fdf4;

    --red: #ef4444;
    --red-dark: #dc2626;
    --red-bg: #fef2f2;

    --sidebar-width: 240px;
    --header-height: 56px;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-lg: 0 4px 24px rgba(0,0,0,0.08);
    --transition: all 0.15s ease;
}

/* ============================================================
   RESET & BASE
   ============================================================ */
* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
    padding: 0;
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--navy);
    color: var(--gray-300);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    transition: transform 0.2s ease;
}

.sidebar::-webkit-scrollbar {
    width: 4px;
}
.sidebar::-webkit-scrollbar-track {
    background: transparent;
}
.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.15);
    border-radius: 4px;
}

/* Brand */
.sidebar-brand {
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.sidebar-brand i {
    font-size: 28px;
    color: var(--orange);
    flex-shrink: 0;
}

.sidebar-brand .brand-text {
    display: flex;
    flex-direction: column;
}

.sidebar-brand .brand-text span {
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.sidebar-brand .brand-text small {
    font-size: 10px;
    color: var(--gray-400);
    font-weight: 400;
    line-height: 1.2;
}

/* Navigation */
.sidebar-nav {
    padding: 8px 0 12px;
    flex: 1;
}

.sidebar-nav .nav-section {
    padding: 8px 20px 4px;
    font-size: 9px;
    text-transform: uppercase;
    color: var(--gray-500);
    font-weight: 700;
    letter-spacing: 0.8px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 7px 20px;
    color: var(--gray-400);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
    border-left: 3px solid transparent;
    cursor: pointer;
    line-height: 1.4;
}

.sidebar-nav a:hover {
    color: var(--white);
    background: rgba(255,255,255,0.04);
    border-left-color: var(--orange);
}

.sidebar-nav a.active {
    color: var(--white);
    background: rgba(255,255,255,0.06);
    border-left-color: var(--orange);
}

.sidebar-nav a i {
    font-size: 17px;
    width: 22px;
    text-align: center;
    flex-shrink: 0;
    color: var(--gray-500);
}

.sidebar-nav a:hover i {
    color: var(--white);
}

.sidebar-nav a.active i {
    color: var(--orange);
}

.sidebar-nav a .badge {
    margin-left: auto;
    font-size: 10px;
    padding: 1px 8px;
    border-radius: 10px;
    background: rgba(255,255,255,0.08);
    color: var(--gray-400);
}

/* Footer */
.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid rgba(255,255,255,0.06);
    flex-shrink: 0;
}

.sidebar-footer .user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--gray-400);
    font-size: 13px;
}

.sidebar-footer .user-info > i {
    font-size: 28px;
    color: var(--gray-500);
    flex-shrink: 0;
}

.sidebar-footer .user-info .user-details {
    flex: 1;
    min-width: 0;
}

.sidebar-footer .user-info .user-details .name {
    color: var(--white);
    font-weight: 600;
    font-size: 13px;
    line-height: 1.3;
}

.sidebar-footer .user-info .user-details .role {
    font-size: 11px;
    color: var(--orange);
    text-transform: capitalize;
    line-height: 1.3;
}

.sidebar-footer .user-info .logout-btn {
    color: var(--gray-400);
    border-color: var(--gray-600);
    padding: 4px 8px;
    font-size: 14px;
    flex-shrink: 0;
    background: transparent;
    border: 1px solid var(--gray-600);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.sidebar-footer .user-info .logout-btn:hover {
    color: var(--white);
    border-color: var(--gray-400);
    background: rgba(255,255,255,0.05);
}

.sidebar-footer .user-info .login-btn {
    padding: 4px 12px;
    font-size: 12px;
    flex-shrink: 0;
    background: var(--orange);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    text-decoration: none;
}

.sidebar-footer .user-info .login-btn:hover {
    background: var(--orange-dark);
    transform: translateY(-1px);
}

/* ============================================================
   MAIN CONTENT
   ============================================================ */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    padding: 24px 32px 40px;
}

/* ============================================================
   TOP BAR
   ============================================================ */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.topbar h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.topbar h1 i {
    color: var(--orange);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

/* ============================================================
   SEARCH BAR
   ============================================================ */
.search-bar {
    position: relative;
    min-width: 280px;
}

.search-bar input {
    width: 100%;
    padding: 8px 16px 8px 40px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 13px;
    transition: var(--transition);
    background: var(--white);
    color: var(--gray-800);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.12);
}

.search-bar i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn i { font-size: 16px; }

.btn-primary {
    background: var(--blue);
    color: white;
}
.btn-primary:hover { background: var(--blue-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(59,130,246,0.3); }

.btn-success {
    background: var(--green);
    color: white;
}
.btn-success:hover { background: var(--green-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(34,197,94,0.3); }

.btn-warning {
    background: var(--orange);
    color: white;
}
.btn-warning:hover { background: var(--orange-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(249,115,22,0.3); }

.btn-danger {
    background: var(--red);
    color: white;
}
.btn-danger:hover { background: var(--red-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(239,68,68,0.3); }

.btn-outline {
    background: transparent;
    color: var(--gray-600);
    border: 2px solid var(--gray-200);
}
.btn-outline:hover { background: var(--gray-100); border-color: var(--gray-300); }

.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-sm i { font-size: 14px; }

.btn-xs { padding: 2px 8px; font-size: 11px; }
.btn-xs i { font-size: 12px; }

/* ============================================================
   TABLES
   ============================================================ */
.table-container {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.table-scroll {
    overflow-x: auto;
    max-height: calc(100vh - 300px);
    overflow-y: auto;
}

.table-scroll::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
.table-scroll::-webkit-scrollbar-track { background: var(--gray-100); }
.table-scroll::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 4px; }
.table-scroll::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    min-width: 600px;
}

.table thead {
    position: sticky;
    top: 0;
    z-index: 10;
}

.table thead th {
    background: var(--gray-100);
    color: var(--gray-600);
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    padding: 10px 14px;
    text-align: left;
    border-bottom: 2px solid var(--gray-200);
    white-space: nowrap;
}

.table tbody td {
    padding: 8px 14px;
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}

.table tbody tr:hover { background: var(--gray-50); }
.table tbody tr:last-child td { border-bottom: none; }

/* ============================================================
   BADGES / STATUS
   ============================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
}

.badge i { font-size: 11px; }

.badge-blue { background: var(--blue-bg); color: var(--blue-dark); }
.badge-green { background: var(--green-bg); color: var(--green-dark); }
.badge-orange { background: var(--orange-bg); color: var(--orange-dark); }
.badge-red { background: var(--red-bg); color: var(--red-dark); }
.badge-gray { background: var(--gray-200); color: var(--gray-600); }

/* Status colors */
.status-work { background: var(--blue-bg); color: var(--blue-dark); }
.status-demounted { background: var(--orange-bg); color: var(--orange-dark); }
.status-sent { background: #e0f2fe; color: #0369a1; }
.status-returning { background: var(--gray-200); color: var(--gray-600); }
.status-stock { background: var(--green-bg); color: var(--green-dark); }
.status-scrap { background: var(--red-bg); color: var(--red-dark); }

/* ============================================================
   KANBAN
   ============================================================ */
.kanban-wrapper {
    display: flex;
    gap: 16px;
    padding-bottom: 16px;
    overflow-x: auto;
    min-height: 500px;
}

.kanban-wrapper::-webkit-scrollbar {
    height: 6px;
}
.kanban-wrapper::-webkit-scrollbar-track { background: var(--gray-200); border-radius: 4px; }
.kanban-wrapper::-webkit-scrollbar-thumb { background: var(--gray-400); border-radius: 4px; }

.kanban-column {
    min-width: 200px;
    max-width: 240px;
    flex: 0 0 auto;
    background: var(--gray-100);
    border-radius: var(--radius);
    padding: 12px;
    max-height: calc(100vh - 200px);
    display: flex;
    flex-direction: column;
}

.kanban-column-header {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-600);
    padding: 6px 10px;
    border-radius: 4px;
    background: var(--white);
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.kanban-column-header .count {
    background: var(--gray-200);
    padding: 0 8px;
    border-radius: 10px;
    font-size: 11px;
    color: var(--gray-600);
}

.kanban-cards {
    flex: 1;
    overflow-y: auto;
    padding-right: 4px;
}

.kanban-cards::-webkit-scrollbar { width: 4px; }
.kanban-cards::-webkit-scrollbar-track { background: transparent; }
.kanban-cards::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 4px; }

.kanban-card {
    background: var(--white);
    border-radius: 6px;
    padding: 8px 12px;
    margin-bottom: 6px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    cursor: pointer;
    transition: var(--transition);
    border-left: 3px solid var(--gray-300);
    font-size: 12px;
}

.kanban-card:hover {
    transform: translateX(2px);
    box-shadow: var(--shadow-lg);
}

.kanban-card .serial {
    font-weight: 600;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    color: var(--gray-800);
}
.kanban-card .name {
    font-size: 11px;
    color: var(--gray-500);
    word-break: break-word;
}
.kanban-card .repair-badge {
    font-size: 9px;
    padding: 1px 6px;
    border-radius: 8px;
    background: var(--gray-200);
    color: var(--gray-600);
}

/* ============================================================
   DASHBOARD STATS
   ============================================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 16px 18px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-card .number {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.2;
}

.stat-card .label {
    font-size: 11px;
    color: var(--gray-500);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-top: 2px;
}

.stat-card .icon {
    float: right;
    font-size: 24px;
    opacity: 0.15;
}

/* ============================================================
   FORMS
   ============================================================ */
.form-group { margin-bottom: 16px; }
.form-label {
    display: block;
    font-weight: 600;
    font-size: 13px;
    color: var(--gray-700);
    margin-bottom: 4px;
}

.form-control, .form-select {
    width: 100%;
    padding: 8px 12px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 13px;
    transition: var(--transition);
    background: var(--white);
    color: var(--gray-800);
}

.form-control:focus, .form-select:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.form-control-sm { padding: 4px 10px; font-size: 12px; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; padding: 16px; }
    .topbar { flex-direction: column; align-items: stretch; }
    .search-bar { min-width: auto; }
    .stats-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 576px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .kanban-column { min-width: 160px; max-width: 180px; }
    .table-scroll { max-height: calc(100vh - 200px); }
}

/* ============================================================
   MOBILE HAMBURGER
   ============================================================ */
.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--gray-700);
    cursor: pointer;
    padding: 4px;
}

@media (max-width: 992px) {
    .hamburger { display: block; }
}

/* ============================================================
   MISCELLANEOUS
   ============================================================ */
.text-muted { color: var(--gray-500); }
.text-truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 24px; }

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 16px; }

.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.flex-grow { flex: 1; }

.w-100 { width: 100%; }

/* ============================================================
   LOGIN PAGE
   ============================================================ */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
    padding: 20px;
}

.login-box {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px 48px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-box .logo {
    text-align: center;
    margin-bottom: 32px;
}
.login-box .logo i {
    font-size: 48px;
    color: var(--orange);
}
.login-box .logo h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    margin: 8px 0 0;
}
.login-box .logo p {
    color: var(--gray-500);
    font-size: 14px;
    margin: 4px 0 0;
}

.login-box .form-control {
    padding: 10px 14px;
}

.login-box .btn {
    width: 100%;
    padding: 10px;
    font-size: 15px;
}

/* ============================================================
   ALERTS
   ============================================================ */
.alert {
    border-radius: var(--radius);
    border: none;
    padding: 12px 16px;
    font-weight: 500;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-success {
    background: var(--green-bg);
    color: var(--green-dark);
    border-left: 4px solid var(--green);
}

.alert-danger {
    background: var(--red-bg);
    color: var(--red-dark);
    border-left: 4px solid var(--red);
}

.alert-warning {
    background: var(--orange-bg);
    color: var(--orange-dark);
    border-left: 4px solid var(--orange);
}

.alert-info {
    background: var(--blue-bg);
    color: var(--blue-dark);
    border-left: 4px solid var(--blue);
}

.alert .btn-close {
    margin-left: auto;
    font-size: 12px;
}

/* ============================================================
   DEVICE SELECTOR (for shipment creation)
   ============================================================ */
.device-selector {
    max-height: 350px;
    overflow-y: auto;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 4px;
    background: var(--white);
}

.device-selector::-webkit-scrollbar {
    width: 6px;
}
.device-selector::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 4px;
}
.device-selector::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 4px;
}

.device-selector .device-item {
    padding: 8px 12px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    gap: 10px;
    border-radius: 4px;
    transition: var(--transition);
}

.device-selector .device-item:hover {
    background: var(--gray-50);
}

.device-selector .device-item.selected {
    background: var(--blue-bg);
    border-left: 3px solid var(--blue);
}

.device-selector .device-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--blue);
    cursor: pointer;
    flex-shrink: 0;
}

.device-selector .device-item label {
    cursor: pointer;
    flex: 1;
    font-size: 13px;
}

.device-selector .device-item .defect-input {
    width: 160px;
    padding: 4px 8px;
    border: 1px solid var(--gray-200);
    border-radius: 4px;
    font-size: 12px;
    flex-shrink: 0;
}

.device-selector .device-item .defect-input:focus {
    outline: none;
    border-color: var(--blue);
}

/* ============================================================
   LOG ENTRY (for audit)
   ============================================================ */
.log-entry {
    padding: 8px 14px;
    border-left: 3px solid var(--blue);
    margin-bottom: 4px;
    background: var(--white);
    border-radius: 4px;
    transition: var(--transition);
    font-size: 13px;
}

.log-entry:hover {
    background: var(--gray-50);
}

.log-entry .timestamp {
    color: var(--gray-500);
    font-size: 11px;
    white-space: nowrap;
}

.log-entry .user {
    font-weight: 600;
    color: var(--blue-dark);
}

.log-entry .action {
    color: var(--orange-dark);
    font-weight: 600;
}

/* ============================================================
   CLICKABLE SERIAL NUMBER
   ============================================================ */
.serial-link {
    text-decoration: none;
    font-weight: 600;
    color: var(--blue-dark);
    transition: var(--transition);
}

.serial-link:hover {
    color: var(--orange);
    text-decoration: underline;
}