@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+TC:wght@300;400;500;700&display=swap');

:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --bg-dark: #0f172a;
  --bg-panel: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --accent: #10b981;
  --danger: #ef4444;
}

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

body {
  font-family: 'Inter', 'Noto Sans TC', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
}

/* Typography */

h1, h2, h3, h4 {
  color: var(--text-main);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.text-gradient {
  background: linear-gradient(135deg, #a5b4fc 0%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Layout */

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

.sidebar {
  width: 320px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border-color);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  z-index: 10;
  box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
}

.main-content {
  flex: 1;
  margin-left: 320px;
  padding: 3rem;
  display: flex;
  justify-content: center;
}

/* Inputs & Forms */

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.input-group label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

:where(input), :where(textarea), :where(select) {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  color: white;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  width: 100%;
}

/* Exclude document-wrapper inputs from dark theme */

.document-wrapper input,
.document-wrapper textarea,
.document-wrapper select {
  background: transparent;
  border: 1px solid transparent;
  color: #1a1a1a;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  box-shadow: none;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Override for inputs inside the white A4 document area */

.document-wrapper input,
.document-wrapper textarea,
.document-wrapper select {
  color: #1a1a1a !important;
  background: transparent !important;
  border: 1px solid transparent !important;
  padding: 0.25rem 0.5rem !important;
  border-radius: 4px !important;
  box-shadow: none !important;
}

.document-wrapper input:hover,
.document-wrapper textarea:hover {
  background: #f8fafc !important;
  border-color: #e2e8f0 !important;
}

.document-wrapper input:focus,
.document-wrapper textarea:focus {
  background: white !important;
  border-color: var(--primary) !important;
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15) !important;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

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

.btn-icon {
  padding: 0.5rem;
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

/* A4 Document View */

.document-wrapper {
  background: white;
  color: #1a1a1a;
  width: 210mm;
  min-height: 297mm;
  padding: 20mm;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  border-radius: 4px;
  position: relative;
}

.doc-header {
  display: flex;
  justify-content: space-between;
  border-bottom: 2px solid #333;
  padding-bottom: 1rem;
  margin-bottom: 2rem;
}

.doc-title h1 {
  color: #1a1a1a;
  font-size: 2rem;
  margin: 0;
  letter-spacing: 2px;
}

.doc-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.9rem;
  text-align: right;
  color: #4a5568;
}

.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.info-block h3 {
  font-size: 1rem;
  color: #4a5568;
  border-bottom: 1px solid #e2e8f0;
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}

.info-row {
  display: flex;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.info-label {
  width: 80px;
  color: #718096;
  font-weight: 500;
}

/* Quote Table */

.quote-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 2rem;
}

.quote-table th {
  background: #f8fafc;
  color: #4a5568;
  font-weight: 600;
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 2px solid #cbd5e1;
}

.quote-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #e2e8f0;
  vertical-align: middle;
}

.quote-table input.inline-input {
  background: transparent;
  border: 1px solid transparent;
  color: #1a1a1a !important;
  padding: 0.25rem 0.5rem;
  width: 100%;
  border-radius: 4px;
  -moz-appearance: textfield;
}

.quote-table input.inline-input::-webkit-outer-spin-button,
.quote-table input.inline-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.quote-table input.inline-input:hover {
  border-color: #e2e8f0;
  background: #f8fafc;
}

.quote-table input.inline-input:focus {
  border-color: var(--primary);
  background: white;
}

/* Force dark text for all inputs inside the white document area */

.document-wrapper input,
.document-wrapper textarea,
.document-wrapper select {
  color: #1a1a1a !important;
  background: transparent;
  border-color: transparent;
}

.document-wrapper input:hover,
.document-wrapper textarea:hover {
  background: #f8fafc;
  border-color: #e2e8f0;
}

.document-wrapper input:focus,
.document-wrapper textarea:focus {
  background: white;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
}

/* Summary Section */

.summary-section {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 3rem;
}

.summary-box {
  width: 300px;
  border-top: 2px solid #cbd5e1;
  padding-top: 1rem;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.summary-row.total {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1a1a1a;
  border-top: 1px solid #e2e8f0;
  padding-top: 0.5rem;
  margin-top: 0.5rem;
}

.terms-box {
  background: #f8fafc;
  padding: 1rem;
  border-radius: 4px;
  font-size: 0.85rem;
  color: #4a5568;
}

.terms-box h4 {
  color: #1a1a1a;
  margin-bottom: 0.5rem;
}

/* Print Styles */

@media print {
  body {
    background: white;
  }
  .sidebar {
    display: none !important;
  }
  .main-content {
    margin-left: 0;
    padding: 0;
  }
  .document-wrapper {
    box-shadow: none;
    margin: 0;
    padding: 0;
    width: 100%;
  }
  .no-print {
    display: none !important;
  }
  input.inline-input {
    border: none !important;
    background: transparent !important;
    padding: 0 !important;
  }
}

/* Flawless Multi-device Responsive Web Design (RWD) */

@media (max-width: 1024px) {
  .app-container {
    flex-direction: column;
  }
  .sidebar {
    position: static;
    width: 100%;
    height: auto;
    padding: 1.5rem;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
  }
  .main-content {
    margin-left: 0;
    padding: 1.5rem;
    width: 100%;
  }
  .document-wrapper {
    width: 100%;
    max-width: 210mm;
    padding: 10mm;
    min-height: auto;
  }
}

@media (max-width: 768px) {
  .main-content {
    padding: 1rem;
  }
  .document-wrapper {
    padding: 1.25rem;
  }
  .info-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .doc-header {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  .doc-meta {
    text-align: left;
    align-items: flex-start;
  }
  .doc-meta div {
    text-align: left !important;
  }
  /* Responsive buttons for top bar */
  .no-print button, .no-print label {
    font-size: 0.85rem;
    padding: 0.5rem 0.75rem;
  }
}

@media (max-width: 480px) {
  .main-content {
    padding: 0.5rem;
  }
  .document-wrapper {
    padding: 0.75rem;
    border-radius: 0;
  }
  .no-print {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .no-print div {
    flex-wrap: wrap;
    gap: 0.25rem;
  }
}