:root {
  --ink: #202426;
  --muted: #687276;
  --paper: #f7f5ed;
  --surface: #ffffff;
  --line: #d8ddd8;
  --pine: #21645a;
  --pine-dark: #15483f;
  --tomato: #df573d;
  --gold: #f0c84b;
  --mist: #dbece7;
  --shadow: 0 18px 45px rgba(32, 36, 38, 0.12);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(219, 236, 231, 0.88), rgba(247, 245, 237, 0.96) 42%, rgba(240, 200, 75, 0.22)),
    linear-gradient(90deg, rgba(223, 87, 61, 0.12), transparent 28%, rgba(33, 100, 90, 0.12)),
    var(--paper);
  font-family: "Aptos", "Segoe UI", sans-serif;
  line-height: 1.5;
}

a {
  color: var(--pine-dark);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.site-header {
  border-bottom: 1px solid rgba(32, 36, 38, 0.09);
  background: rgba(247, 245, 237, 0.82);
  backdrop-filter: blur(18px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav {
  align-items: center;
  display: flex;
  gap: 22px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max);
  padding: 16px 22px;
}

.brand {
  align-items: center;
  color: var(--ink);
  display: inline-flex;
  font-weight: 900;
  gap: 10px;
  letter-spacing: 0;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  background: var(--pine);
  border: 2px solid var(--ink);
  border-radius: 6px;
  color: #fff;
  display: inline-flex;
  height: 32px;
  justify-content: center;
  width: 32px;
}

.nav-links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--ink);
}

.page-shell {
  margin: 0 auto;
  max-width: var(--max);
  padding: 28px 22px 56px;
}

.tool-intro {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 0.92fr) minmax(260px, 0.48fr);
  margin: 24px 0 22px;
}

.intro-copy h1 {
  font-size: clamp(2.08rem, 4vw, 4.15rem);
  line-height: 0.99;
  margin: 0 0 18px;
  max-width: 820px;
}

.intro-copy p {
  color: var(--muted);
  font-size: 1.08rem;
  margin: 0;
  max-width: 730px;
}

.privacy-note {
  align-self: end;
  border-left: 4px solid var(--tomato);
  color: var(--muted);
  padding: 12px 0 12px 16px;
}

.privacy-note strong {
  color: var(--ink);
  display: block;
  margin-bottom: 4px;
}

.tool-grid {
  align-items: start;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(300px, 380px) minmax(0, 1fr);
}

.panel {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(32, 36, 38, 0.12);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.controls {
  padding: 18px;
}

.drop-zone {
  align-items: center;
  background:
    linear-gradient(135deg, rgba(33, 100, 90, 0.12), rgba(240, 200, 75, 0.18)),
    #fffdf7;
  border: 2px dashed rgba(33, 100, 90, 0.52);
  border-radius: var(--radius);
  display: grid;
  gap: 8px;
  min-height: 174px;
  padding: 22px;
  place-items: center;
  text-align: center;
  transition: border-color 160ms ease, transform 160ms ease;
}

.drop-zone.is-dragging {
  border-color: var(--tomato);
  transform: translateY(-2px);
}

.drop-zone input {
  height: 1px;
  opacity: 0;
  position: absolute;
  width: 1px;
}

.drop-title {
  font-size: 1.08rem;
  font-weight: 900;
}

.drop-hint {
  color: var(--muted);
  font-size: 0.92rem;
}

.file-picker-text {
  background: var(--ink);
  border-radius: 6px;
  color: #fff;
  display: inline-flex;
  font-weight: 900;
  margin-top: 4px;
  min-height: 38px;
  padding: 8px 14px;
}

.control-stack {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.control {
  display: grid;
  gap: 8px;
}

.control label,
.segmented legend {
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 900;
}

select {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  min-height: 42px;
  padding: 8px 10px;
  width: 100%;
}

.segmented {
  border: 0;
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.segmented label {
  cursor: pointer;
}

.segmented input {
  height: 1px;
  opacity: 0;
  position: absolute;
  width: 1px;
}

.segmented span {
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: flex;
  font-weight: 800;
  min-height: 42px;
  padding: 8px 10px;
}

.segmented input:checked + span {
  background: var(--pine);
  border-color: var(--pine);
  color: #fff;
}

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

.toggle-row input {
  accent-color: var(--pine);
  height: 18px;
  width: 18px;
}

.toggle-row label {
  font-weight: 800;
}

.control-hint {
  background: rgba(33, 100, 90, 0.08);
  border: 1px solid rgba(33, 100, 90, 0.12);
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.94rem;
  padding: 12px;
}

.actions {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 1fr;
  margin-top: 18px;
}

.btn {
  align-items: center;
  border: 1px solid transparent;
  border-radius: 6px;
  display: inline-flex;
  font-weight: 900;
  justify-content: center;
  min-height: 44px;
  padding: 10px 14px;
  text-decoration: none;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

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

.btn-primary {
  background: var(--pine);
  box-shadow: 0 12px 22px rgba(33, 100, 90, 0.24);
  color: #fff;
}

.btn-primary:hover {
  background: var(--pine-dark);
}

.btn-secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

.preview-panel {
  overflow: hidden;
}

.preview-topbar {
  align-items: center;
  border-bottom: 1px solid rgba(32, 36, 38, 0.1);
  display: flex;
  gap: 12px;
  justify-content: space-between;
  padding: 14px 16px;
}

.status-chip {
  background: rgba(240, 200, 75, 0.22);
  border: 1px solid rgba(240, 200, 75, 0.44);
  border-radius: 999px;
  color: #6b5520;
  font-size: 0.86rem;
  font-weight: 900;
  padding: 5px 10px;
}

.preview-stage {
  background: #151a1f;
  padding: 14px;
}

.preview-stage canvas,
.preview-tile canvas {
  border: 1px solid rgba(255, 255, 255, 0.18);
  display: block;
  height: auto;
  width: 100%;
}

.preview-row {
  background: #101417;
  display: grid;
  gap: 10px;
  grid-template-columns: 1.42fr 1fr 0.82fr;
  padding: 12px 14px 14px;
}

.preview-tile {
  min-width: 0;
}

.preview-label {
  align-items: center;
  color: rgba(255, 255, 255, 0.86);
  display: flex;
  font-size: 0.82rem;
  gap: 8px;
  justify-content: space-between;
  margin-bottom: 6px;
}

.preview-label span {
  color: rgba(255, 255, 255, 0.58);
  font-variant-numeric: tabular-nums;
}

.metric-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, 1fr);
  padding: 14px;
}

.metric-grid div {
  background: rgba(33, 100, 90, 0.08);
  border: 1px solid rgba(33, 100, 90, 0.12);
  border-radius: 8px;
  min-width: 0;
  padding: 13px;
}

.metric-grid strong,
.metric-grid span {
  display: block;
}

.metric-grid strong {
  color: var(--pine);
  font-size: clamp(1.25rem, 2.6vw, 2rem);
  line-height: 1.1;
  overflow-wrap: anywhere;
}

.metric-grid span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 900;
}

.insight-panel {
  border-top: 1px solid rgba(32, 36, 38, 0.1);
  padding: 16px;
}

.insight-header {
  align-items: center;
  display: flex;
  gap: 12px;
  justify-content: space-between;
  margin-bottom: 10px;
}

.insight-header h2 {
  font-size: 1rem;
  margin: 0;
}

.insights-list {
  color: var(--muted);
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 20px;
}

.seo-section {
  margin-top: 52px;
}

.seo-section h2 {
  font-size: clamp(1.7rem, 3vw, 2.45rem);
  line-height: 1.08;
  margin: 0 0 14px;
}

.seo-section p {
  color: var(--muted);
  max-width: 820px;
}

.feature-grid,
.faq-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
}

.feature,
.faq-item {
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(32, 36, 38, 0.1);
  border-radius: var(--radius);
  padding: 16px;
}

.feature h3,
.faq-item h3 {
  font-size: 1.02rem;
  margin: 0 0 8px;
}

.feature p,
.faq-item p {
  font-size: 0.96rem;
  margin: 0;
}

.size-section {
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(32, 36, 38, 0.1);
  border-radius: var(--radius);
  padding: 22px;
}

.size-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 16px 0;
}

.size-grid span {
  background: rgba(33, 100, 90, 0.1);
  border: 1px solid rgba(33, 100, 90, 0.16);
  border-radius: 999px;
  color: var(--pine);
  font-size: 0.9rem;
  font-weight: 900;
  padding: 8px 11px;
}

.content-page {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(32, 36, 38, 0.1);
  border-radius: var(--radius);
  margin-top: 28px;
  padding: 28px;
}

.content-page h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin: 0 0 18px;
}

.content-page h2 {
  margin-top: 28px;
}

.content-page p,
.content-page li {
  color: var(--muted);
}

.content-page table {
  border-collapse: collapse;
  margin: 18px 0;
  width: 100%;
}

.content-page th,
.content-page td {
  border: 1px solid var(--line);
  padding: 10px;
  text-align: left;
  vertical-align: top;
}

.content-page th {
  background: rgba(33, 100, 90, 0.08);
  color: var(--ink);
}

.site-footer {
  border-top: 1px solid rgba(32, 36, 38, 0.1);
  color: var(--muted);
  margin-top: 48px;
  padding: 22px;
}

.footer-inner {
  align-items: center;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (max-width: 980px) {
  .tool-intro,
  .tool-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 660px) {
  .nav,
  .footer-inner,
  .insight-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .actions,
  .metric-grid,
  .preview-row {
    grid-template-columns: 1fr;
  }

  .page-shell {
    padding-inline: 14px;
  }

  .controls,
  .content-page,
  .size-section {
    padding: 14px;
  }
}