/* 🎨 Main CSS for PR/PO System */
/* Modern, Professional, Dark Mode Ready */

/* ===== CSS VARIABLES ===== */
:root {
  /* Primary Colors */
  --color-primary: #2563eb;
  --sidebar-width: 260px;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;

  /* Material Icons Fallback */
  .material-icons {
    font-family: 'Material Icons';
    font-weight: normal;
    font-style: normal;
    font-size: 24px;
    /* Preferred icon size */
    display: inline-block;
    line-height: 1;
    text-transform: none;
    letter-spacing: normal;
    word-wrap: normal;
    white-space: nowrap;
    direction: ltr;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: 'liga';
  }

  /* Secondary Colors */
  --color-secondary: #7c3aed;
  --color-secondary-dark: #6d28d9;
  --color-secondary-light: #8b5cf6;

  /* Status Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-info: #3b82f6;

  /* Neutral Colors */
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;

  /* Background */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-dark: #0f172a;
  --bg-card: #ffffff;

  /* Text */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  /* Border */
  --border-color: #e2e8f0;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;

  /* Shadow */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1),
  0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
  0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
  0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
  0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Typography */
  --font-sans: 'Sarabun',
  'Inter',
  -apple-system,
  BlinkMacSystemFont,
  'Segoe UI',
  sans-serif;
  --font-mono: 'Fira Code',
  'Courier New',
  monospace;

  /* Border Radius */
  --border-radius-sm: 0.375rem;
  --border-radius: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-dark: #000000;
  --bg-card: #1e293b;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;

  --border-color: #334155;
}

/* ===== RESET & BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Sarabun', sans-serif;
  background-color: var(--bg-body);
  color: var(--color-text);
  line-height: 1.5;
  margin: 0;
  padding: 0;
}

/* ===== TYPOGRAPHY ===== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  color: var(--color-text);
  margin-top: 0;
}

h1 {
  font-size: 1.875rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--spacing-md);
}

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

a:hover {
  color: var(--color-primary-dark);
}

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-lg);
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  margin-top: 52px;
  padding: 1.75rem 2rem;
  transition: margin-left 0.3s ease;
}

@media (max-width: 768px) {
  .main-content {
    margin-left: 0;
    padding: 1rem;
  }
}

/* Grid System */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(var(--spacing-md) * -1);
}

.col {
  flex: 1;
  padding: 0 var(--spacing-md);
}

.col-1 {
  flex: 0 0 8.333333%;
  max-width: 8.333333%;
}

.col-2 {
  flex: 0 0 16.666667%;
  max-width: 16.666667%;
}

.col-3 {
  flex: 0 0 25%;
  max-width: 25%;
}

.col-4 {
  flex: 0 0 33.333333%;
  max-width: 33.333333%;
}

.col-6 {
  flex: 0 0 50%;
  max-width: 50%;
}

.col-8 {
  flex: 0 0 66.666667%;
  max-width: 66.666667%;
}

.col-12 {
  flex: 0 0 100%;
  max-width: 100%;
}

/* ===== CARDS ===== */
.card {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-normal);
}

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

.card-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
}

.card-body {
  padding: 0;
}

.card-footer {
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

/* Glassmorphism Card */
.card-glass {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

[data-theme="dark"] .card-glass {
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--border-radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: white;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
}

.btn-secondary {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-light));
  color: white;
}

.btn-success {
  background: var(--color-success);
  color: white;
}

.btn-danger {
  background: var(--color-danger);
  color: white;
}

.btn-warning {
  background: var(--color-warning);
  color: white;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: white;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

.btn-icon {
  padding: 0.625rem;
  border-radius: 50%;
}

/* ===== FORMS ===== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control::placeholder {
  color: var(--text-muted);
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
}

select.form-control {
  cursor: pointer;
}

.form-check {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form-check-input {
  width: 1.25rem;
  height: 1.25rem;
  cursor: pointer;
}

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary {
  background: var(--color-primary);
  color: white;
}

.badge-success {
  background: var(--color-success);
  color: white;
}

.badge-warning {
  background: var(--color-warning);
  color: white;
}

.badge-danger {
  background: var(--color-danger);
  color: white;
}

.badge-info {
  background: var(--color-info);
  color: white;
}

.badge-gray {
  background: var(--color-gray-500);
  color: white;
}

.badge-green {
  background: var(--color-success);
  color: white;
}

.badge-yellow {
  background: var(--color-warning);
  color: white;
}

.badge-red {
  background: var(--color-danger);
  color: white;
}

.badge-blue {
  background: var(--color-info);
  color: white;
}

.badge-purple {
  background: var(--color-secondary);
  color: white;
}

/* ===== TABLES ===== */
.table-container {
  overflow-x: auto;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
}

.table thead {
  background: var(--bg-secondary);
}

.table th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border-color);
}

.table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.table tbody tr:hover {
  background: var(--bg-secondary);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* ===== MODALS ===== */
/* ===== MODALS (Moved to components.css) ===== */
/* 
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

.modal-overlay.show .modal {
  transform: scale(1);
}
*/

.modal-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

/* ===== UTILITIES ===== */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.text-primary {
  color: var(--color-primary);
}

.text-success {
  color: var(--color-success);
}

.text-warning {
  color: var(--color-warning);
}

.text-danger {
  color: var(--color-danger);
}

.text-muted {
  color: var(--text-muted);
}

.bg-primary {
  background: var(--color-primary);
}

.bg-secondary {
  background: var(--bg-secondary);
}

.mt-0 {
  margin-top: 0;
}

.mt-1 {
  margin-top: var(--spacing-sm);
}

.mt-2 {
  margin-top: var(--spacing-md);
}

.mt-3 {
  margin-top: var(--spacing-lg);
}

.mt-4 {
  margin-top: var(--spacing-xl);
}

.mb-0 {
  margin-bottom: 0;
}

.mb-1 {
  margin-bottom: var(--spacing-sm);
}

.mb-2 {
  margin-bottom: var(--spacing-md);
}

.mb-3 {
  margin-bottom: var(--spacing-lg);
}

.mb-4 {
  margin-bottom: var(--spacing-xl);
}

.p-0 {
  padding: 0;
}

.p-1 {
  padding: var(--spacing-sm);
}

.p-2 {
  padding: var(--spacing-md);
}

.p-3 {
  padding: var(--spacing-lg);
}

.p-4 {
  padding: var(--spacing-xl);
}

.d-none {
  display: none;
}

.d-block {
  display: block;
}

.d-flex {
  display: flex;
}

.d-grid {
  display: grid;
}

.flex-column {
  flex-direction: column;
}

.flex-row {
  flex-direction: row;
}

.align-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-1 {
  gap: var(--spacing-sm);
}

.gap-2 {
  gap: var(--spacing-md);
}

.gap-3 {
  gap: var(--spacing-lg);
}

.rounded {
  border-radius: var(--border-radius);
}

.rounded-sm {
  border-radius: var(--border-radius-sm);
}

.rounded-lg {
  border-radius: var(--border-radius-lg);
}

.rounded-full {
  border-radius: 9999px;
}

.shadow {
  box-shadow: var(--shadow);
}

.shadow-md {
  box-shadow: var(--shadow-md);
}

.shadow-lg {
  box-shadow: var(--shadow-lg);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .col-1,
  .col-2,
  .col-3,
  .col-4,
  .col-6,
  .col-8 {
    flex: 0 0 100%;
    max-width: 100%;
  }

  .modal {
    width: 95%;
  }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-400);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-500);
}

/* ===== TOPBAR ===== */
.app-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 52px;
  background: #1e293b;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  z-index: 2000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.topbar-logo {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.topbar-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  text-decoration: none;
  transition: background 0.2s;
}

.topbar-icon-btn:hover {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
}

.topbar-icon-btn .material-icons {
  font-size: 20px;
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0 0.5rem;
}

.topbar-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  object-fit: cover;
  border: 2.5px solid rgba(255, 255, 255, 0.85);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.5);
}

.topbar-avatar-text {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2.5px solid rgba(255, 255, 255, 0.85);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.5), 0 2px 8px rgba(99, 102, 241, 0.4);
  letter-spacing: 0;
}

.topbar-username {
  font-size: 0.875rem;
  color: #e2e8f0;
  font-weight: 500;
  white-space: nowrap;
}

/* ===== SIDEBAR (Zone-based) ===== */
.sidebar {
  position: fixed;
  top: 52px;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: #0f172a;
  z-index: 1500;
  display: flex;
  flex-direction: column;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0;
  display: flex;
  flex-direction: column;
}

/* --- Zone Groups --- */
.sidebar-zone {
  margin-bottom: 2px;
}

.sidebar-zone-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px 5px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.4);
  margin-top: 4px;
  border-left: 3px solid transparent;
}

.sidebar-zone-header .material-icons {
  font-size: 18px;
}

/* Zone Blue — ผู้ขอซื้อ */
.sidebar-zone-header.zone-blue {
  color: #60a5fa;
  border-left-color: #3b82f6;
  background: rgba(59, 130, 246, 0.08);
}

.sidebar-zone.zone-blue .nav-item.active {
  border-left-color: #3b82f6;
  background: rgba(59, 130, 246, 0.18);
  color: #93c5fd;
}

.sidebar-zone.zone-blue .nav-item:hover {
  background: rgba(59, 130, 246, 0.1);
}

/* Zone Green — หัวหน้าอนุมัติ */
.sidebar-zone-header.zone-green {
  color: #34d399;
  border-left-color: #059669;
  background: rgba(5, 150, 105, 0.08);
}

.sidebar-zone.zone-green .nav-item.active {
  border-left-color: #059669;
  background: rgba(5, 150, 105, 0.18);
  color: #6ee7b7;
}

.sidebar-zone.zone-green .nav-item:hover {
  background: rgba(5, 150, 105, 0.1);
}

/* Zone Purple — จัดซื้อ */
.sidebar-zone-header.zone-purple {
  color: #a78bfa;
  border-left-color: #7c3aed;
  background: rgba(124, 58, 237, 0.08);
}

.sidebar-zone.zone-purple .nav-item.active {
  border-left-color: #7c3aed;
  background: rgba(124, 58, 237, 0.18);
  color: #c4b5fd;
}

.sidebar-zone.zone-purple .nav-item:hover {
  background: rgba(124, 58, 237, 0.1);
}

/* Zone Orange — รายงาน */
.sidebar-zone-header.zone-orange {
  color: #fb923c;
  border-left-color: #ea580c;
  background: rgba(234, 88, 12, 0.08);
}

.sidebar-zone.zone-orange .nav-item.active {
  border-left-color: #ea580c;
  background: rgba(234, 88, 12, 0.18);
  color: #fdba74;
}

.sidebar-zone.zone-orange .nav-item:hover {
  background: rgba(234, 88, 12, 0.1);
}

/* --- Nav Items --- */
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 16px 7px 22px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.15s ease;
  border-left: 3px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-item .material-icons {
  font-size: 20px;
  flex-shrink: 0;
  opacity: 0.85;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.nav-item.active {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-weight: 600;
  border-left-color: #60a5fa;
}

/* --- Nav Divider --- */
.nav-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.06);
  margin: 6px 16px;
}

/* --- Sub-menu (Collapsible) --- */
.nav-group {
  width: 100%;
}

.nav-group-toggle {
  cursor: pointer;
  user-select: none;
}

.nav-group-toggle .nav-chevron {
  margin-left: auto;
  font-size: 16px !important;
  opacity: 0.7;
  transition: transform 0.2s ease;
}

.nav-submenu {
  overflow: hidden;
  background: transparent;
  margin-left: 8px;
}

.nav-subitem {
  padding: 6px 16px 6px 32px !important;
  font-size: 0.82rem !important;
  opacity: 0.88;
}

/* --- Sidebar Bottom --- */
.sidebar-bottom {
  margin-top: auto;
  padding-bottom: 8px;
}

/* --- Sidebar Scrollbar --- */
.sidebar-nav::-webkit-scrollbar {
  width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* --- Sidebar Overlay (mobile) --- */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 52px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1499;
  backdrop-filter: blur(2px);
}

.sidebar-overlay.show {
  display: block;
}

/* --- Topbar Hamburger --- */
.topbar-hamburger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
  margin-right: 4px;
}

.topbar-hamburger:hover {
  background: rgba(255, 255, 255, 0.18);
}

.topbar-hamburger .material-icons {
  font-size: 22px;
}

/* --- Mobile Responsive --- */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.active {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.3);
  }

  .topbar-hamburger {
    display: flex;
  }

  .topbar-username {
    display: none;
  }
}