/* ==========================================================================
   Cha Devlion - Secure Client-side Receipt Dutch Pay Stylesheet
   ========================================================================== */

:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-primary: #38bdf8;
  --accent-hover: #0284c7;
  --accent-light: rgba(56, 189, 248, 0.12);
  
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  
  --border-color: #334155;
  --border-light: #475569;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html, body {
  width: 100%;
  min-height: 100vh;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.app-header {
  height: 58px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo {
  color: var(--accent-primary);
  display: flex;
}

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

.title-group h1 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.badge {
  font-size: 11px;
  font-weight: 600;
  background-color: var(--accent-light);
  color: var(--accent-primary);
  padding: 2px 8px;
  border-radius: 12px;
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.security-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 500;
  color: var(--success);
  background-color: rgba(52, 211, 153, 0.1);
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid rgba(52, 211, 153, 0.2);
}

/* Main Workspace */
.main-content {
  flex: 1;
  padding: 24px 16px;
  display: flex;
  justify-content: center;
}

.content-wrapper {
  width: 100%;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Privacy Banner */
.privacy-banner {
  background-color: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: 10px;
  padding: 12px 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 13px;
  color: var(--text-secondary);
}

.privacy-icon {
  color: var(--accent-primary);
  margin-top: 1px;
}

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

/* Mode Selector Cards */
.mode-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.mode-btn {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 14px 12px;
  text-align: left;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all 0.2s ease;
}

.mode-btn:hover {
  border-color: var(--text-muted);
}

.mode-btn.active {
  background-color: var(--accent-light);
  border-color: var(--accent-primary);
}

.mode-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.mode-btn.active .mode-title {
  color: var(--accent-primary);
}

.mode-desc {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.3;
}

/* Card Sections */
.card-section {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
}

.card-header {
  padding: 14px 18px;
  background-color: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h2 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.step-num {
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-mono);
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 2px 8px;
  border-radius: 4px;
}

.card-body {
  padding: 18px;
}

/* Form Controls */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-row {
  display: flex;
  gap: 12px;
}

.form-group.half {
  flex: 1;
}

label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

input[type="text"],
input[type="number"],
select,
textarea {
  width: 100%;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--text-primary);
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s ease;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--accent-primary);
}

textarea {
  resize: vertical;
  line-height: 1.5;
  font-family: var(--font-mono);
  font-size: 13px;
}

/* Participant Tags */
.participants-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.p-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 16px;
  border: 1px solid var(--border-color);
}

.p-tag.primary-payer {
  background-color: var(--accent-light);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  font-weight: 600;
}

.p-remove {
  cursor: pointer;
  color: var(--text-muted);
  font-weight: bold;
  margin-left: 2px;
}

.p-remove:hover {
  color: var(--danger);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #0f172a;
}

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

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

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

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-danger-sm {
  background-color: transparent;
  color: var(--danger);
  border: 1px solid rgba(248, 113, 113, 0.3);
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 11px;
}

.btn-danger-sm:hover {
  background-color: rgba(248, 113, 113, 0.15);
}

.action-bar {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

/* Parsed Items Table */
.parsed-items-container {
  margin-top: 18px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.subsection-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin-bottom: 12px;
}

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

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

.items-table th {
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  font-weight: 600;
}

.items-table td input[type="text"],
.items-table td input[type="number"] {
  padding: 6px 8px;
  font-size: 13px;
}

.member-checkboxes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.member-cb-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
}

.member-cb-label input {
  accent-color: var(--accent-primary);
}

/* Multi-Round Cards */
.round-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 12px;
}

.round-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.round-card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-primary);
}

/* Summary Grid */
.summary-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.stat-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px;
  text-align: center;
}

.stat-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.stat-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-primary);
  font-family: var(--font-mono);
}

/* Transfer List */
.transfer-box {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 18px;
}

.transfer-box h3 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.transfer-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.transfer-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 14px;
}

.transfer-from-to {
  display: flex;
  align-items: center;
  gap: 8px;
}

.payer-name { font-weight: 600; color: var(--danger); }
.arrow { color: var(--text-muted); }
.payee-name { font-weight: 600; color: var(--success); }

.transfer-amount {
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-primary);
}

/* Share Kakao Box */
.share-box {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
}

.share-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.share-header h3 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.share-preview {
  background-color: #0b1329;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: #e2e8f0;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 250px;
  overflow-y: auto;
}

/* Footer */
.app-footer {
  padding: 20px;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}

.security-foot {
  color: var(--success);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--accent-primary);
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 13px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.hidden {
  display: none !important;
}

/* Responsive */
@media (max-width: 640px) {
  .mode-selector {
    grid-template-columns: 1fr;
  }
  .form-row {
    flex-direction: column;
    gap: 14px;
  }
  .summary-cards-grid {
    grid-template-columns: 1fr;
  }
  .security-badge {
    display: none;
  }
}