/* Timesheet Generator - Atlassian Design inspired */
:root {
  --color-primary: #0052CC;
  --color-primary-hover: #0065FF;
  --color-primary-light: #DEEBFF;
  --color-secondary: #6554C0;
  --color-success: #36B37E;
  --color-warning: #FFAB00;
  --color-danger: #DE350B;
  --color-bg: #FAFBFC;
  --color-surface: #FFFFFF;
  --color-text: #172B4D;
  --color-text-subtle: #6B778C;
  --color-text-inverse: #FFFFFF;
  --color-border: #DFE1E6;
  --color-border-focus: #4C9AFF;
  --shadow-sm: 0 1px 2px rgba(9,30,66,0.08);
  --shadow-md: 0 4px 8px rgba(9,30,66,0.1);
  --shadow-lg: 0 8px 16px rgba(9,30,66,0.15);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans JP', sans-serif;
  --transition: 0.2s ease;
}

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

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); text-decoration: underline; }

/* Header */
.app-header {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-header h1 {
  font-size: 20px;
  font-weight: 600;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.lang-toggle {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  color: #fff;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  transition: var(--transition);
}
.lang-toggle:hover { background: rgba(255,255,255,0.25); }

/* Main Layout */
.main-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 16px;
}

/* Cards */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  padding: 24px;
  margin-bottom: 20px;
  transition: var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); }

.card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* KPI Dashboard */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.kpi-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.kpi-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.kpi-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 8px 0 4px;
}
.kpi-label {
  font-size: 13px;
  color: var(--color-text-subtle);
  font-weight: 500;
}
.kpi-icon {
  font-size: 24px;
}

/* Tabs */
.tab-bar {
  display: flex;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 20px;
  overflow-x: auto;
  gap: 0;
}

.tab-btn {
  padding: 10px 20px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-subtle);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
  white-space: nowrap;
}
.tab-btn:hover { color: var(--color-primary); }
.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* Client Tabs */
.client-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.client-tab {
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}
.client-tab:hover { border-color: var(--color-primary); color: var(--color-primary); }
.client-tab.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.client-tab .remove-client {
  font-size: 14px;
  line-height: 1;
  opacity: 0.7;
  cursor: pointer;
}
.client-tab .remove-client:hover { opacity: 1; }

.add-client-btn {
  padding: 6px 12px;
  border-radius: 20px;
  border: 1px dashed var(--color-border);
  background: none;
  cursor: pointer;
  font-size: 13px;
  color: var(--color-text-subtle);
  transition: var(--transition);
}
.add-client-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  line-height: 1.4;
}
.btn:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

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

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: #EBECF0; }

.btn-success {
  background: var(--color-success);
  color: #fff;
}
.btn-success:hover { background: #2d9e6e; }

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}
.btn-danger:hover { background: #c42e08; }

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

.btn-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-surface);
  transition: var(--transition);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 2px rgba(76,154,255,0.2);
}

.form-textarea { resize: vertical; min-height: 60px; }

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

/* Table */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

.data-table th, .data-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.data-table th {
  background: var(--color-bg);
  font-weight: 600;
  color: var(--color-text-subtle);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: sticky;
  top: 0;
}

.data-table tbody tr:hover { background: #F4F5F7; }

.data-table .actions-cell {
  display: flex;
  gap: 4px;
}

/* Calendar */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.calendar-header {
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-subtle);
  padding: 8px 4px;
}

.calendar-day {
  aspect-ratio: 1;
  min-height: 60px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px;
  font-size: 12px;
  position: relative;
  transition: var(--transition);
  cursor: pointer;
}
.calendar-day:hover { border-color: var(--color-primary); }
.calendar-day.empty { border: none; background: none; cursor: default; }
.calendar-day.today { border-color: var(--color-primary); background: var(--color-primary-light); }
.calendar-day.has-entry { background: #E3FCEF; }

.calendar-day .day-num {
  font-weight: 600;
  color: var(--color-text);
}
.calendar-day.weekend .day-num { color: var(--color-danger); }

.calendar-day .day-hours {
  position: absolute;
  bottom: 4px;
  left: 4px;
  right: 4px;
}

.day-hours-bar {
  height: 6px;
  background: var(--color-primary);
  border-radius: 3px;
  transition: var(--transition);
}

.calendar-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.calendar-nav .month-label {
  font-size: 18px;
  font-weight: 600;
}

/* Charts */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.chart-container {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.chart-container h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-text);
}

.chart-container canvas {
  max-height: 280px;
}

/* Settings */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

/* Template Selection */
.template-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.template-card {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}
.template-card:hover { border-color: var(--color-primary); }
.template-card.active {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}
.template-card .template-icon { font-size: 32px; margin-bottom: 8px; }
.template-card .template-name { font-weight: 600; font-size: 14px; }
.template-card .template-desc { font-size: 12px; color: var(--color-text-subtle); margin-top: 4px; }

/* Save Slots */
.save-slots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.save-slot {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}
.save-slot:hover { border-color: var(--color-primary); }
.save-slot.occupied { background: #F4F5F7; }
.save-slot .slot-label { font-weight: 600; font-size: 14px; }
.save-slot .slot-info { font-size: 12px; color: var(--color-text-subtle); margin-top: 4px; }

/* View Toggle */
.view-toggle {
  display: inline-flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.view-toggle button {
  padding: 6px 14px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 13px;
  transition: var(--transition);
  color: var(--color-text-subtle);
}
.view-toggle button:not(:last-child) { border-right: 1px solid var(--color-border); }
.view-toggle button.active { background: var(--color-primary); color: #fff; }
.view-toggle button:hover:not(.active) { background: #F4F5F7; }

/* Related Tools */
.related-tools {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.tool-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition);
  text-decoration: none;
  color: var(--color-text);
}
.tool-link:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: var(--color-text);
}
.tool-link .tool-icon { font-size: 24px; }
.tool-link .tool-name { font-weight: 600; font-size: 14px; }
.tool-link .tool-desc { font-size: 12px; color: var(--color-text-subtle); }

/* FAQ */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 14px 16px;
  border: none;
  background: none;
  text-align: left;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text);
  transition: var(--transition);
}
.faq-question:hover { background: #F4F5F7; }
.faq-question .faq-arrow { transition: transform 0.2s; }
.faq-item.open .faq-arrow { transform: rotate(180deg); }

.faq-answer {
  padding: 0 16px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s, padding 0.3s;
  font-size: 14px;
  color: var(--color-text-subtle);
  line-height: 1.7;
}
.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 16px 14px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(9,30,66,0.54);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.modal-overlay.active { opacity: 1; pointer-events: all; }

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 560px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  padding: 24px;
  transform: translateY(20px);
  transition: transform 0.2s;
}
.modal-overlay.active .modal { transform: translateY(0); }

.modal-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

/* Badge */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
}
.badge-primary { background: var(--color-primary-light); color: var(--color-primary); }
.badge-success { background: #E3FCEF; color: #006644; }
.badge-warning { background: #FFFAE6; color: #FF8B00; }

/* Section titles */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.section-title {
  font-size: 20px;
  font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
  .app-header { padding: 12px 16px; }
  .app-header h1 { font-size: 16px; }
  .main-container { padding: 16px 12px; }
  .card { padding: 16px; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .kpi-value { font-size: 22px; }
  .form-row { grid-template-columns: 1fr; }
  .charts-grid { grid-template-columns: 1fr; }
  .calendar-day { min-height: 40px; font-size: 10px; }
  .template-options { grid-template-columns: 1fr; }
  .related-tools { grid-template-columns: 1fr; }
  .tab-btn { padding: 8px 12px; font-size: 13px; }
}

@media (max-width: 480px) {
  .kpi-grid { grid-template-columns: 1fr; }
  .btn-group { flex-direction: column; }
  .btn-group .btn { width: 100%; justify-content: center; }
}

/* Print styles */
@media print {
  .app-header, .tab-bar, .btn-group, .header-actions,
  .client-tabs, .add-client-btn, .view-toggle { display: none !important; }
  .card { box-shadow: none; border: 1px solid #ccc; break-inside: avoid; }
}

/* Utility */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-16 { margin-bottom: 16px; }
.hidden { display: none !important; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: #C1C7D0; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #A5ADBA; }

/* Toast notification */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 300;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { background: var(--color-success); }
.toast.error { background: var(--color-danger); }
.toast.info { background: var(--color-primary); }

/* File input */
.file-input-wrapper {
  position: relative;
  overflow: hidden;
  display: inline-block;
}
.file-input-wrapper input[type="file"] {
  position: absolute;
  left: 0; top: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}