:root {
  --bg: #0b0f14;
  --bg-elev: #121820;
  --bg-panel: #161d27;
  --border: #243041;
  --text: #e8eef6;
  --muted: #8b9bb0;
  --accent: #38bdf8;
  --accent-2: #22d3ee;
  --accent-dim: rgba(56, 189, 248, 0.15);
  --success: #34d399;
  --danger: #f87171;
  --radius: 14px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --invoice-bg: #ffffff;
  --invoice-text: #0f172a;
  --invoice-muted: #64748b;
  --invoice-line: #e2e8f0;
  --invoice-accent: #0ea5e9;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(56, 189, 248, 0.12), transparent 60%),
    radial-gradient(900px 500px at 90% 0%, rgba(34, 211, 238, 0.08), transparent 55%),
    var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

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

.container {
  width: min(1180px, calc(100% - 2rem));
  margin-inline: auto;
}
.container.narrow {
  width: min(640px, calc(100% - 2rem));
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(11, 15, 20, 0.75);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), #0284c7);
  font-size: 0.75rem;
  font-weight: 700;
}
.nav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}
.nav a:not(.btn) {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}
.nav a:not(.btn):hover {
  color: var(--text);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.7rem 1.25rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none !important;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:active {
  transform: translateY(1px);
}
.btn-sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.875rem;
}
.btn-primary {
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  color: #041018 !important;
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.35);
}
.btn-primary:hover {
  filter: brightness(1.06);
}
.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text) !important;
}
.btn-ghost:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

/* Hero */
.hero {
  padding: 3.5rem 0 2rem;
  text-align: center;
}
.eyebrow {
  display: inline-block;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 0 0 1rem;
}
.hero h1 {
  margin: 0 auto 0.85rem;
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  letter-spacing: -0.035em;
  line-height: 1.1;
  max-width: 16ch;
}
.hero-sub {
  margin: 0 auto 1.5rem;
  color: var(--muted);
  max-width: 42ch;
  font-size: 1.05rem;
}
.hero-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* App */
.app-section {
  padding: 1.5rem 0 3rem;
}
.app-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  align-items: start;
}
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.panel h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}
.panel h3 {
  margin: 0;
  font-size: 0.95rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
}
input,
textarea,
select {
  font: inherit;
  color: var(--text);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
textarea {
  resize: vertical;
  min-height: 5.5rem;
}
input:focus,
textarea:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.field-row {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}
.field-row.two {
  grid-template-columns: 1fr 1fr;
}
.field-row.three {
  grid-template-columns: 1fr 1fr 1fr;
}

.line-items-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 1.1rem 0 0.6rem;
}
.line-items {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-bottom: 1rem;
}
.line-item {
  display: grid;
  grid-template-columns: 1.6fr 0.55fr 0.7fr auto;
  gap: 0.45rem;
  align-items: end;
}
.line-item .remove {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 10px;
  width: 40px;
  height: 40px;
  cursor: pointer;
}
.line-item .remove:hover {
  color: var(--danger);
  border-color: var(--danger);
}

.notes-label {
  margin-bottom: 1rem;
}

.form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.toggle {
  flex-direction: row;
  align-items: center;
  gap: 0.55rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
}
.toggle input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--accent);
}
.hint {
  margin: 0.75rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}
.preview-toolbar h2 {
  margin: 0;
}
.badge {
  font-family: var(--mono);
  font-size: 0.85rem;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
}
.preview-scroll {
  background: #0a0e13;
  border-radius: 12px;
  padding: 1rem;
  overflow: auto;
  max-height: min(78vh, 920px);
}

/* Invoice paper */
.invoice {
  background: var(--invoice-bg);
  color: var(--invoice-text);
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 2.1rem 1.6rem;
  border-radius: 4px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
  font-size: 13.5px;
  line-height: 1.45;
}
.invoice * {
  box-sizing: border-box;
}
.inv-top {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.75rem;
}
.inv-brand {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--invoice-accent);
}
.inv-meta {
  text-align: right;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--invoice-muted);
}
.inv-meta strong {
  display: block;
  color: var(--invoice-text);
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
  font-family: var(--font);
}
.inv-parties {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}
.inv-party-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--invoice-muted);
  margin-bottom: 0.35rem;
  font-weight: 700;
}
.inv-party-body {
  white-space: pre-wrap;
  font-size: 13px;
}
.inv-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.25rem;
}
.inv-table th {
  text-align: left;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--invoice-muted);
  border-bottom: 2px solid var(--invoice-line);
  padding: 0.45rem 0.35rem;
}
.inv-table th.num,
.inv-table td.num {
  text-align: right;
}
.inv-table td {
  padding: 0.65rem 0.35rem;
  border-bottom: 1px solid var(--invoice-line);
  vertical-align: top;
}
.inv-totals {
  margin-left: auto;
  width: min(240px, 100%);
}
.inv-totals .row {
  display: flex;
  justify-content: space-between;
  padding: 0.3rem 0;
  color: var(--invoice-muted);
}
.inv-totals .row.grand {
  margin-top: 0.35rem;
  padding-top: 0.55rem;
  border-top: 2px solid var(--invoice-text);
  color: var(--invoice-text);
  font-weight: 700;
  font-size: 1.05rem;
}
.inv-notes {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--invoice-line);
  color: var(--invoice-muted);
  font-size: 12px;
  white-space: pre-wrap;
}
.inv-watermark {
  margin-top: 1.4rem;
  text-align: center;
  font-size: 10px;
  letter-spacing: 0.04em;
  color: #94a3b8;
}

/* Templates */
.invoice.minimal .inv-brand {
  color: var(--invoice-text);
  font-weight: 600;
}
.invoice.minimal .inv-table th {
  border-bottom-width: 1px;
}
.invoice.bold {
  --invoice-accent: #0369a1;
}
.invoice.bold .inv-top {
  background: #0ea5e9;
  color: #fff;
  margin: -2rem -2.1rem 1.5rem;
  padding: 1.5rem 2.1rem;
  border-radius: 4px 4px 0 0;
}
.invoice.bold .inv-brand,
.invoice.bold .inv-meta,
.invoice.bold .inv-meta strong {
  color: #fff;
}
.invoice.serif {
  font-family: Georgia, "Times New Roman", serif;
}
.invoice.serif .inv-brand {
  font-style: italic;
  color: #1e293b;
}

/* Pricing */
.pricing-section {
  padding: 3rem 0 2rem;
  text-align: center;
}
.pricing-section h2,
.pro-anchor h2 {
  margin: 0 0 0.4rem;
  letter-spacing: -0.03em;
  font-size: 1.85rem;
}
.section-sub {
  color: var(--muted);
  margin: 0 0 1.75rem;
}
.pricing-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 320px));
  gap: 1rem;
  justify-content: center;
  text-align: left;
}
.price-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  position: relative;
}
.price-card.featured {
  border-color: rgba(56, 189, 248, 0.55);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.2), var(--shadow);
}
.pill {
  position: absolute;
  top: -0.65rem;
  right: 1rem;
  background: var(--accent);
  color: #041018;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}
.price-card h3 {
  margin: 0 0 0.35rem;
}
.price {
  margin: 0 0 1rem;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}
.price small {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
}
.price-card ul {
  margin: 0 0 1.25rem;
  padding: 0;
  list-style: none;
}
.price-card li {
  padding: 0.35rem 0;
  color: var(--muted);
  font-size: 0.92rem;
}
.price-card li::before {
  content: "✓ ";
  color: var(--success);
  font-weight: 700;
}
.owner-note {
  margin: 0.85rem 0 0;
  font-size: 0.75rem;
  color: var(--muted);
}
.owner-note code {
  font-family: var(--mono);
  font-size: 0.7rem;
  background: var(--bg-elev);
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
}

.pro-anchor {
  padding: 2rem 0 3.5rem;
  text-align: center;
}
.pro-anchor p {
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2rem;
}
.footer-inner {
  text-align: center;
}
.footer-inner p {
  margin: 0.2rem 0;
  font-size: 0.85rem;
}
.muted {
  color: var(--muted);
}

@media (max-width: 920px) {
  .app-grid {
    grid-template-columns: 1fr;
  }
  .preview-panel {
    order: -1;
  }
  .preview-scroll {
    max-height: 55vh;
  }
  .field-row.two,
  .field-row.three {
    grid-template-columns: 1fr;
  }
  .line-item {
    grid-template-columns: 1fr 1fr;
  }
  .line-item label:first-child {
    grid-column: 1 / -1;
  }
  .pricing-cards {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin-inline: auto;
  }
}

@media (max-width: 560px) {
  .nav a:not(.btn) {
    display: none;
  }
  .invoice {
    padding: 1.25rem;
  }
  .inv-top,
  .inv-parties {
    grid-template-columns: 1fr;
    display: grid;
  }
  .inv-meta {
    text-align: left;
  }
}