:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --success: #10b981;
  --danger: #ef4444;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
}

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

.hidden {
  display: none !important;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Navigation */
.app-header {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  font-size: 2rem;
  line-height: 1;
}

.brand h1 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
}

.subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.nav-tabs {
  display: flex;
  gap: 0.5rem;
  background: var(--bg-subtle);
  padding: 0.25rem;
  border-radius: var(--radius-md);
}

.nav-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease-in-out;
}

.nav-tab:hover {
  color: var(--text-main);
}

.nav-tab.active {
  background: var(--bg-card);
  color: var(--primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

/* Main Container */
.main-content {
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem;
  flex: 1;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

/* Buttons & Inputs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}

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

.btn-secondary {
  background-color: var(--bg-subtle);
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--border-hover);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-outline:hover {
  background-color: var(--bg-subtle);
}

.btn-danger-outline {
  background-color: transparent;
  color: var(--danger);
  border-color: #fecaca;
}

.btn-danger-outline:hover {
  background-color: #fef2f2;
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

.btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

.input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
  color: var(--text-main);
  transition: border-color 0.15s;
}

.input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.input-lg {
  font-size: 1.25rem;
  font-weight: 600;
  padding: 0.5rem 0.75rem;
}

.input-subtle {
  border-color: transparent;
  background: transparent;
  padding-left: 0.5rem;
  color: var(--text-muted);
}

.input-subtle:focus {
  border-color: var(--border-color);
  background: var(--bg-card);
}

.input-color {
  width: 42px;
  height: 38px;
  padding: 2px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.select {
  appearance: auto;
  cursor: pointer;
}

/* Calendar Toolbar & Range Assignment */
.calendar-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  background: var(--bg-card);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.25rem;
}

.year-selector {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.year-selector h2 {
  font-size: 1.5rem;
  font-weight: 700;
  min-width: 80px;
  text-align: center;
}

.quick-assign-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
  min-width: 320px;
  max-width: 850px;
}

.quick-assign-header {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.assign-form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.form-group-inline {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
}

.form-group-inline input[type="date"] {
  width: 140px;
}

.form-group-inline select {
  min-width: 160px;
}

/* Legend Bar & Quick Click Assign */
.quick-click-bar {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
  padding: 0.85rem 1.25rem;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.quick-click-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.quick-click-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-main);
}

.quick-click-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.quick-click-pills {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn-click-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 500;
  border: 1.5px solid var(--border-color);
  border-radius: 20px;
  background: var(--bg-subtle);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.btn-click-pill:hover {
  border-color: var(--border-hover);
  background: #ffffff;
}

.btn-click-pill.active {
  background: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
  font-weight: 700;
}

.legend-color-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

/* 12-Month Grid */
.year-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, min-min(280px, 1fr));
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

@media (max-width: 1200px) {
  .year-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .year-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .year-grid {
    grid-template-columns: 1fr;
  }
}

.month-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}

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

.month-title {
  font-size: 0.95rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
  color: var(--text-main);
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--border-color);
}

.month-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.month-table th {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-light);
  text-align: center;
  padding: 0.2rem 0;
}

.day-cell {
  height: 34px;
  text-align: center;
  vertical-align: middle;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
  transition: all 0.12s ease;
  user-select: none;
}

.day-cell:hover:not(.empty) {
  filter: brightness(0.92);
  transform: scale(1.05);
  z-index: 2;
}

.day-cell.empty {
  cursor: default;
}

.day-cell.is-today {
  font-weight: 800;
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

.day-cell.has-assignment {
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.day-cell.weekend:not(.has-assignment) {
  color: var(--text-muted);
  background-color: #f8fafc;
}

/* Template Workspace */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.section-desc {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 0.2rem;
}

.header-actions {
  display: flex;
  gap: 0.5rem;
}

.template-workspace {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 860px) {
  .template-workspace {
    grid-template-columns: 1fr;
  }
}

.template-sidebar {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
}

.template-sidebar h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.template-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.template-item-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.65rem 0.85rem;
  text-align: left;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-subtle);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.template-item-btn:hover {
  border-color: var(--border-hover);
  background: #ffffff;
}

.template-item-btn.active {
  background: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary);
  font-weight: 600;
}

.tpl-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.tpl-color-badge {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.tpl-shift-count {
  font-size: 0.75rem;
  color: var(--text-light);
  background: var(--bg-card);
  padding: 0.1rem 0.4rem;
  border-radius: 10px;
}

.template-empty-state {
  background: var(--bg-card);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 4rem 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.template-empty-state.hidden {
  display: none !important;
}

.template-editor.hidden {
  display: none !important;
}

/* Template Editor */
.template-editor {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.editor-header {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.editor-title-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.editor-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.color-badge-picker input[type="color"] {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  cursor: pointer;
  padding: 0;
  overflow: hidden;
}

/* Week Shifts Grid (Mo-So columns with 5 fixed blocks) */
.week-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.75rem;
  min-height: 400px;
}

@media (max-width: 1200px) {
  .week-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 860px) {
  .week-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .week-grid {
    grid-template-columns: 1fr;
  }
}

.weekday-column {
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  border: 1px solid var(--border-color);
}

.weekday-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  font-size: 0.9rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--border-hover);
  color: var(--text-main);
}

.weekday-header.weekend {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.weekday-actions {
  display: flex;
  gap: 0.25rem;
}

.shifts-container {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  flex: 1;
}

.shift-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.6rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  position: relative;
  transition: all 0.15s ease;
}

.shift-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}

.shift-card.assigned {
  border-left: 4px solid var(--primary);
}

.shift-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.block-title-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.block-time-display {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.shift-employee-select {
  font-size: 0.8rem;
  padding: 0.35rem 0.5rem;
  width: 100%;
}

.shift-note-input {
  font-size: 0.75rem;
  padding: 0.25rem 0.45rem;
  color: var(--text-muted);
}

.editor-footer {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.status-msg {
  font-size: 0.875rem;
  font-weight: 500;
}

.status-msg.success {
  color: var(--success);
}

.status-msg.error {
  color: var(--danger);
}

/* Employees Grid */
.employees-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.employee-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: box-shadow 0.2s;
}

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

.employee-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.employee-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.employee-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 700;
  font-size: 1rem;
}

.employee-names h4 {
  font-size: 1.05rem;
  font-weight: 700;
}

.employee-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.employee-actions {
  display: flex;
  gap: 0.25rem;
}

.ical-box {
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border: 1px solid var(--border-color);
}

.ical-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

.ical-url-row {
  display: flex;
  gap: 0.4rem;
}

.ical-url-input {
  font-family: monospace;
  font-size: 0.75rem;
  background: #ffffff;
  padding: 0.35rem 0.5rem;
}

/* Info Cards */
.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.info-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.info-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.info-step {
  background: var(--bg-subtle);
  padding: 1rem;
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--primary);
}

.info-step strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  color: var(--text-main);
}

.info-step p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.info-step code {
  background: #e2e8f0;
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  font-size: 0.75rem;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
  animation: fadeIn 0.15s ease-out;
}

.modal-backdrop.hidden {
  display: none;
}

.modal-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 520px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
}

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

.modal-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 70vh;
  overflow-y: auto;
}

.modal-footer {
  padding: 1rem 1.5rem;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

.modal-day-assign-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
}

.modal-day-assign-row label {
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* Day Inspector shifts inside modal */
.day-inspector-shift {
  padding: 0.75rem;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.day-inspector-shift .shift-info-title {
  font-weight: 700;
  font-size: 0.9rem;
}

.day-inspector-shift .shift-info-time {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.day-inspector-shift .shift-info-staff {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  font-size: 0.85rem;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 200;
}

.toast {
  background: #1e293b;
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.2s ease-out;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toast.success {
  border-left: 4px solid var(--success);
}

.toast.error {
  border-left: 4px solid var(--danger);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Auth Gate Screen */
.auth-gate-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
  padding: 1.5rem;
}

.auth-gate-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  max-width: 420px;
  width: 100%;
  padding: 2.5rem;
  text-align: center;
  animation: fadeIn 0.3s ease-out;
}

.auth-gate-brand {
  margin-bottom: 2rem;
}

.auth-gate-icon {
  font-size: 3.5rem;
  display: inline-block;
  margin-bottom: 0.5rem;
}

.auth-gate-brand h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.auth-gate-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
}