@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ==========================================================================
   Design Tokens (Based on design.md - Cal.com SaaS Style)
   ========================================================================== */
:root {
  /* Colors */
  --primary: #111111;
  --primary-active: #242424;
  --brand-accent: #3b82f6;
  
  /* Surfaces */
  --canvas: #ffffff;
  --surface-soft: #f8f9fa;
  --surface-card: #f5f5f5;
  --surface-strong: #e5e7eb;
  --surface-dark: #101010;
  --surface-dark-elevated: #1a1a1a;
  
  /* Borders */
  --hairline: #e5e7eb;
  --hairline-soft: #f3f4f6;
  
  /* Typography Colors */
  --ink: #111111;
  --body: #374151;
  --muted: #6b7280;
  --muted-soft: #898989;
  --on-primary: #ffffff;
  --on-dark: #ffffff;
  --on-dark-soft: #a1a1aa;
  
  /* Semantics & Badges */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --badge-orange: #fb923c;
  --badge-pink: #ec4899;
  --badge-violet: #8b5cf6;
  --badge-emerald: #34d399;
  
  /* Radii */
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --rounded-pill: 9999px;
  
  /* Spacing */
  --spacing-xxs: 4px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-section: 64px;
  
  /* Font Families (Pretendard Premium Font Applied) */
  --font-display: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-body: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  
  /* Shadows */
  --shadow-subtle: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.04);
  --shadow-modal: 0 20px 40px rgba(0, 0, 0, 0.15);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--canvas);
  color: var(--body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Typography Classes */
h1, h2, h3, h4, .display-head {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.03em; /* Cal Sans negative tracking style */
}

h1 { font-size: 32px; line-height: 1.15; }
h2 { font-size: 24px; line-height: 1.2; }
h3 { font-size: 18px; line-height: 1.3; }

p { font-size: 14px; color: var(--body); }
.muted { color: var(--muted); }
.muted-soft { color: var(--muted-soft); }

/* Top Navigation */
.top-nav {
  height: 64px;
  background-color: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  z-index: 100;
}

.top-nav-container {
  max-width: 1380px;
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
  letter-spacing: -0.5px;
  text-decoration: none;
}

.brand-logo .dot {
  width: 8px;
  height: 8px;
  background-color: var(--primary);
  border-radius: var(--rounded-pill);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

#admin-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Signature Nav Pill Group */
.nav-pill-group {
  background-color: var(--surface-soft);
  padding: 4px;
  border-radius: var(--rounded-pill);
  display: inline-flex;
  gap: 4px;
  border: 1px solid var(--hairline-soft);
}

.category-tab {
  padding: 8px 18px;
  border-radius: var(--rounded-pill);
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.category-tab:hover {
  color: var(--ink);
}

.category-tab.active {
  background-color: var(--canvas);
  color: var(--ink);
  font-weight: 600;
  box-shadow: var(--shadow-subtle);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 16px;
  border-radius: var(--rounded-md);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

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

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

.btn-secondary {
  background-color: var(--canvas);
  color: var(--ink);
  border-color: var(--hairline);
}

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

.btn-sm {
  height: 32px;
  padding: 0 12px;
  font-size: 13px;
  border-radius: var(--rounded-sm);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--rounded-full);
}

.btn-action-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--rounded-sm);
  line-height: 1;
}

/* Main Container & Layout (Cal.com SaaS Balanced Layout) */
.container {
  width: 100%;
  max-width: 1380px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
}

/* Header & Sub-header Area */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.header-title-area h1 {
  margin-bottom: 4px;
}

.header-title-area p {
  color: var(--muted);
  font-size: 15px;
}

/* Dashboard Summary Cards */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.sub-dday-list-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 4px;
  overflow: visible;
}

.sub-dday-item {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--ink);
}

.sub-dday-item .badge-pill {
  flex-shrink: 0;
  min-width: 68px;
  justify-content: center;
}

.sub-dday-item .group-name {
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.summary-card {
  background-color: var(--surface-card);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-lg);
  border: 1px solid var(--hairline-soft);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

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

.summary-card .card-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.summary-card .card-value {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.5px;
}

.summary-card .card-subtext {
  font-size: 12px;
  color: var(--muted);
  margin-top: 6px;
}

.summary-card.accent-card {
  background-color: var(--primary);
  color: var(--on-dark);
}

.summary-card.accent-card .card-label,
.summary-card.accent-card .card-subtext {
  color: var(--on-dark-soft);
}

.summary-card.accent-card .card-value {
  color: var(--on-dark);
}

/* Filter & Controls Bar */
.controls-bar {
  background-color: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.search-input-wrap {
  position: relative;
  min-width: 220px;
}

.search-input-wrap svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
}

.text-input, .select-input {
  height: 38px;
  padding: 0 14px;
  border-radius: var(--rounded-md);
  border: 1px solid var(--hairline);
  background-color: var(--canvas);
  color: var(--ink);
  font-size: 14px;
  font-family: var(--font-body);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.text-input:focus, .select-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(17, 17, 17, 0.1);
}

.search-input-wrap .text-input {
  padding-left: 36px;
  width: 100%;
}

.view-switcher {
  display: flex;
  background-color: var(--surface-soft);
  padding: 3px;
  border-radius: var(--rounded-md);
  border: 1px solid var(--hairline-soft);
}

.view-btn {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  background: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

.view-btn.active {
  background-color: var(--canvas);
  color: var(--ink);
  font-weight: 600;
  box-shadow: var(--shadow-subtle);
}

/* Badges & Tags */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--rounded-pill);
  font-size: 12px;
  font-weight: 500;
  background-color: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline);
}

.badge-success {
  background-color: #ecfdf5;
  color: #047857;
  border-color: #a7f3d0;
}

.badge-pending {
  background-color: #fffbeb;
  color: #b45309;
  border-color: #fde68a;
}

.badge-d-day {
  background-color: #fef2f2;
  color: #dc2626;
  border-color: #fecaca;
  font-weight: 600;
}

.badge-d-warning {
  background-color: #fff7ed;
  color: #c2410c;
  border-color: #ffedd5;
  font-weight: 600;
}

.badge-group {
  background-color: #eff6ff;
  color: #1d4ed8;
  border-color: #bfdbfe;
}

/* Data Table & Card Styling (Cal.com SaaS Clean Wide Table) */
.table-card, .table-container {
  background-color: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  box-shadow: var(--shadow-subtle);
  margin-bottom: var(--spacing-xl);
  overflow: hidden;
  max-width: 100%;
}

.table-header {
  padding: 14px 18px;
  background-color: var(--surface-soft);
  border-bottom: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.table-header h3 {
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
}

.header-count-badge {
  font-size: 12px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--rounded-pill);
  background-color: var(--surface-strong);
  color: var(--ink);
}

.table-responsive {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Custom Smooth Thin Scrollbar for table-responsive */
.table-responsive::-webkit-scrollbar {
  height: 6px;
}
.table-responsive::-webkit-scrollbar-track {
  background: var(--surface-soft);
}
.table-responsive::-webkit-scrollbar-thumb {
  background: var(--hairline);
  border-radius: var(--rounded-pill);
}
.table-responsive::-webkit-scrollbar-thumb:hover {
  background: var(--muted);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  text-align: left;
  font-size: 13.5px;
  min-width: 980px;
}

.data-table th {
  background-color: var(--surface-card);
  padding: 12px 14px;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--hairline);
  font-size: 13px;
  letter-spacing: -0.1px;
  white-space: nowrap;
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--hairline-soft);
  color: var(--body);
  vertical-align: middle;
  white-space: nowrap;
}

.data-table td.topic-cell {
  white-space: normal;
  word-break: keep-all;
  overflow-wrap: break-word;
  max-width: 200px;
  line-height: 1.45;
}

.topic-title {
  font-size: 13.5px;
  line-height: 1.4;
  word-break: keep-all;
}

.topic-group-wrap {
  display: flex;
  align-items: center;
}

.topic-group-wrap .badge-group {
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cell-ellipsis {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cell-wrap {
  white-space: normal !important;
  word-break: keep-all;
  overflow-wrap: break-word;
  line-height: 1.4;
}

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

.data-table tbody tr:hover {
  background-color: rgba(248, 249, 250, 0.7);
}

.data-table tr.group-row {
  background-color: #f8fafc;
}

.data-table tr.completed-row {
  opacity: 0.9;
}

.data-table tr.completed-row td.topic-cell {
  text-decoration: none;
}

.checkbox-custom {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 1.5px solid var(--muted);
  cursor: pointer;
  accent-color: var(--primary);
}

/* Calendar & Monthly Cards View */
.calendar-view-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.month-card {
  background-color: var(--surface-card);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-lg);
  border: 1px solid var(--hairline-soft);
}

.month-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--hairline);
}

.month-card-header h3 {
  font-size: 16px;
}

.month-item-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.month-item {
  background-color: var(--canvas);
  border-radius: var(--rounded-md);
  padding: 12px;
  border: 1px solid var(--hairline);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.month-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.month-item-title {
  font-weight: 600;
  color: var(--ink);
  font-size: 14px;
}

.month-item-meta {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  gap: 12px;
}

/* Naver Exchange Calculator Component */
.exchange-widget-card {
  background-color: var(--surface-card);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-lg);
  border: 1px solid var(--hairline);
  margin-bottom: var(--spacing-xl);
}

.exchange-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.exchange-header h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
}

.calc-box {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  background-color: var(--canvas);
  padding: var(--spacing-md);
  border-radius: var(--rounded-md);
  border: 1px solid var(--hairline);
}

.calc-input-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.calc-input-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}

/* Modals */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-backdrop.active {
  display: flex !important;
  opacity: 1 !important;
  pointer-events: auto !important;
  z-index: 99999 !important;
}

.modal-card {
  background-color: #ffffff !important;
  width: 90%;
  max-width: 520px;
  border-radius: var(--rounded-xl);
  padding: var(--spacing-xl);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2), 0 10px 10px -5px rgba(0, 0, 0, 0.1) !important;
  border: 1px solid var(--hairline);
  position: relative !important;
  z-index: 100001 !important;
  opacity: 1 !important;
  display: block !important;
  transform: translateY(0) !important;
  transition: transform 0.2s ease;
}

.modal-backdrop.active .modal-card {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}

.modal-header h3 {
  font-size: 20px;
}

.close-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--rounded-full);
}

.close-btn:hover {
  background-color: var(--surface-soft);
  color: var(--ink);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full-width {
  grid-column: span 2;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

/* Footer (Dark Surface - Cal.com Signature Closing) */
.footer-dark {
  background-color: var(--surface-dark);
  color: var(--on-dark-soft);
  padding: 48px 0 32px 0;
  margin-top: var(--spacing-section);
  border-top: 1px solid #222;
}

.footer-content {
  max-width: 1380px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
  color: var(--on-dark);
}

.footer-brand .dot {
  width: 8px;
  height: 8px;
  background-color: var(--on-dark);
  border-radius: var(--rounded-pill);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  font-size: 14px;
}

.footer-links a {
  color: var(--on-dark-soft);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--on-dark);
}

/* Table Section Header */
.table-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding: 0 4px;
}

.table-section-header h3 {
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Utilities & Animations */
.hidden { display: none !important; }
.text-right { text-align: right; }
.text-center { text-align: center; }

@media (max-width: 768px) {
  .top-nav { padding: 0 var(--spacing-md); }
  .container { padding: var(--spacing-lg) var(--spacing-md); }
  .controls-bar { flex-direction: column; align-items: stretch; }
  .filter-group { width: 100%; justify-content: space-between; }
  .search-input-wrap { width: 100%; min-width: unset; }
  .form-grid { grid-template-columns: 1fr; }
  .form-group.full-width { grid-column: span 1; }
  .dashboard-grid { grid-template-columns: 1fr; }
}