:root {
  --k2-green: #3cb878;
  --k2-green-dark: #1f8f4e;
  --k2-orange: #f7941d;
  --k2-orange-dark: #e56b00;
  --k2-bg: #f4f7f5;
  --k2-card: #ffffff;
  --k2-text: #1f2937;
  --k2-muted: #6b7280;
  --k2-border: #e5e7eb;
  --k2-shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--k2-text);
  background:
    radial-gradient(circle at top left, rgba(60, 184, 120, 0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(247, 148, 29, 0.12), transparent 24%),
    var(--k2-bg);
  line-height: 1.5;
}

a {
  color: var(--k2-green-dark);
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  padding: 24px 0 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand img {
  width: 88px;
  height: 88px;
  object-fit: contain;
  background: transparent;
}

.brand-copy h1 {
  margin: 0 0 6px;
  font-size: clamp(1.5rem, 2vw, 2rem);
}

.brand-copy p {
  margin: 0;
  color: var(--k2-muted);
}

.layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  padding-bottom: 48px;
}

.card {
  background: var(--k2-card);
  border: 1px solid var(--k2-border);
  border-radius: 18px;
  box-shadow: var(--k2-shadow);
}

.card-header {
  padding: 20px 24px 0;
}

.card-header h2 {
  margin: 0 0 8px;
  font-size: 1.25rem;
}

.card-body {
  padding: 20px 24px 24px;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.field label {
  display: block;
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.field input,
.field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--k2-border);
  border-radius: 12px;
  font: inherit;
  background: #fff;
}

.field input:focus,
.field select:focus {
  outline: 2px solid rgba(60, 184, 120, 0.25);
  border-color: var(--k2-green);
}

.tier-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(60, 184, 120, 0.12);
  color: var(--k2-green-dark);
  font-weight: 700;
}

.module-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.search-input {
  flex: 1 1 240px;
}

.module-list {
  max-height: 560px;
  overflow: auto;
  border: 1px solid var(--k2-border);
  border-radius: 14px;
}

.module-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  border-bottom: 1px solid var(--k2-border);
}

.module-item:last-child {
  border-bottom: 0;
}

.module-item:hover {
  background: rgba(60, 184, 120, 0.04);
}

.module-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--k2-green-dark);
}

.module-name {
  font-weight: 600;
}

.module-meta {
  font-size: 0.85rem;
  color: var(--k2-muted);
}

.module-price {
  text-align: right;
  min-width: 120px;
  font-weight: 700;
}

.summary-card {
  position: sticky;
  top: 16px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--k2-border);
}

.summary-row:last-child {
  border-bottom: 0;
}

.summary-row.total {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--k2-green-dark);
}

.summary-row.annual {
  color: var(--k2-orange-dark);
  font-weight: 700;
}

.summary-note {
  margin-top: 12px;
  font-size: 0.9rem;
  color: var(--k2-muted);
}

.actions {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border: 0;
  border-radius: 12px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--k2-green), var(--k2-green-dark));
  color: #fff;
}

.btn-secondary {
  background: #fff;
  color: var(--k2-text);
  border: 1px solid var(--k2-border);
}

.btn-accent {
  background: linear-gradient(135deg, var(--k2-orange), var(--k2-orange-dark));
  color: #fff;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.share-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.alert {
  padding: 12px 14px;
  border-radius: 12px;
  margin-bottom: 16px;
}

.alert-error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.alert-success {
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.hidden {
  display: none !important;
}

.loading {
  padding: 48px 0;
  text-align: center;
  color: var(--k2-muted);
}

.proposal-page {
  padding-bottom: 48px;
}

.proposal-paper {
  background: #fff;
  border: 1px solid var(--k2-border);
  border-radius: 18px;
  box-shadow: var(--k2-shadow);
  overflow: hidden;
}

.proposal-top {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 32px;
  background: linear-gradient(135deg, rgba(60, 184, 120, 0.08), rgba(247, 148, 29, 0.08));
  border-bottom: 1px solid var(--k2-border);
}

.proposal-top img {
  width: 96px;
  height: 96px;
  object-fit: contain;
  background: transparent;
}

.proposal-title {
  margin: 0 0 8px;
  font-size: 1.8rem;
  letter-spacing: 0.04em;
}

.proposal-subtitle,
.proposal-meta {
  margin: 0;
  color: var(--k2-muted);
}

.proposal-content {
  padding: 28px 32px 32px;
}

.proposal-intro {
  margin: 0 0 24px;
  color: #374151;
}

.proposal-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
}

.proposal-table th,
.proposal-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--k2-border);
  text-align: left;
}

.proposal-table th {
  background: #f9fafb;
  font-size: 0.92rem;
}

.proposal-table td.num,
.proposal-table th.num {
  text-align: right;
  white-space: nowrap;
}

.proposal-table tr.total-row td {
  font-weight: 800;
  background: rgba(60, 184, 120, 0.08);
}

.proposal-table tr.annual-row td {
  font-weight: 700;
  color: var(--k2-orange-dark);
}

.proposal-note {
  padding: 14px 16px;
  border-radius: 12px;
  background: #f9fafb;
  color: var(--k2-muted);
  margin-bottom: 24px;
}

.proposal-terms h3 {
  margin-top: 0;
}

.proposal-terms ul {
  margin: 0;
  padding-left: 20px;
}

.proposal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0;
}

.site-footer {
  padding: 24px 0 40px;
  color: var(--k2-muted);
  font-size: 0.92rem;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .summary-card {
    position: static;
  }

  .controls-grid,
  .share-grid {
    grid-template-columns: 1fr;
  }

  .proposal-top {
    flex-direction: column;
  }
}

@media print {
  body {
    background: #fff;
  }

  .no-print {
    display: none !important;
  }

  .proposal-paper {
    box-shadow: none;
    border: 0;
  }
}