:root {
  --ink: #1e2528;
  --muted: #617073;
  --paper: #fbfaf4;
  --surface: #ffffff;
  --line: #d8ded6;
  --leaf: #2f6f5e;
  --leaf-dark: #214f44;
  --coral: #d96545;
  --sun: #f2c14e;
  --sky: #d9edf2;
  --shadow: 0 18px 45px rgba(30, 37, 40, 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(217, 237, 242, 0.9), rgba(251, 250, 244, 0.92) 38%, rgba(242, 193, 78, 0.22)),
    radial-gradient(circle at 15% 8%, rgba(217, 101, 69, 0.16), transparent 28%),
    var(--paper);
  font-family: "Aptos", "Segoe UI", sans-serif;
  line-height: 1.5;
}

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

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.site-header {
  border-bottom: 1px solid rgba(30, 37, 40, 0.09);
  background: rgba(251, 250, 244, 0.78);
  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;
  display: inline-flex;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  background: var(--leaf);
  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;
  gap: 16px;
  flex-wrap: wrap;
}

.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(2.1rem, 4vw, 4.25rem);
  line-height: 0.98;
  margin: 0 0 18px;
  max-width: 780px;
}

.intro-copy p {
  color: var(--muted);
  font-size: 1.08rem;
  margin: 0;
  max-width: 680px;
}

.privacy-note {
  align-self: end;
  border-left: 4px solid var(--coral);
  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(310px, 410px) minmax(0, 1fr);
}

.panel {
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(30, 37, 40, 0.12);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.controls {
  padding: 18px;
}

.drop-zone {
  align-items: center;
  background:
    linear-gradient(135deg, rgba(47, 111, 94, 0.12), rgba(242, 193, 78, 0.16)),
    #fffdf7;
  border: 2px dashed rgba(47, 111, 94, 0.52);
  border-radius: var(--radius);
  display: grid;
  gap: 8px;
  min-height: 158px;
  padding: 22px;
  place-items: center;
  text-align: center;
  transition: border-color 160ms ease, transform 160ms ease;
}

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

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

.drop-title {
  font-size: 1.08rem;
  font-weight: 800;
}

.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: 800;
  margin-top: 4px;
  min-height: 38px;
  padding: 8px 14px;
}

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

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

.control-row {
  align-items: center;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.control label,
.control legend {
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 800;
}

.control output {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  accent-color: var(--leaf);
  width: 100%;
}

input[type="color"] {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  height: 42px;
  padding: 3px;
  width: 100%;
}

select,
input[type="number"] {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  min-height: 42px;
  padding: 8px 10px;
  width: 100%;
}

.split {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr 1fr;
}

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

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

.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: 800;
  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(--leaf);
  color: #fff;
  box-shadow: 0 12px 22px rgba(47, 111, 94, 0.24);
}

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

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

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
}

.preview-panel {
  min-height: 620px;
  overflow: hidden;
}

.preview-topbar {
  align-items: center;
  border-bottom: 1px solid rgba(30, 37, 40, 0.1);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
}

.file-meta {
  color: var(--muted);
  font-size: 0.92rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.canvas-stage {
  align-items: center;
  background-color: #eef2ee;
  background-image:
    linear-gradient(45deg, rgba(30, 37, 40, 0.06) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(30, 37, 40, 0.06) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(30, 37, 40, 0.06) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(30, 37, 40, 0.06) 75%);
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  background-size: 20px 20px;
  display: flex;
  justify-content: center;
  min-height: 560px;
  padding: 24px;
}

canvas {
  height: auto;
  max-height: 520px;
  max-width: 100%;
  object-fit: contain;
}

.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, 0.66);
  border: 1px solid rgba(30, 37, 40, 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;
}

.content-page {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(30, 37, 40, 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);
}

.site-footer {
  border-top: 1px solid rgba(30, 37, 40, 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;
  gap: 14px;
  flex-wrap: wrap;
}

.calculator-layout {
  align-items: start;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(310px, 430px) minmax(0, 1fr);
}

.calculator-form {
  padding: 18px;
}

.small-note {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 2px 0 0;
}

.results-panel {
  display: grid;
  gap: 14px;
}

.result-hero {
  background:
    linear-gradient(135deg, rgba(47, 111, 94, 0.96), rgba(30, 37, 40, 0.94)),
    var(--leaf);
  color: #fff;
  padding: 22px;
}

.result-hero .eyebrow {
  color: rgba(255, 255, 255, 0.74);
  display: block;
  font-size: 0.88rem;
  font-weight: 800;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.result-hero strong {
  display: block;
  font-size: clamp(2.8rem, 8vw, 5.4rem);
  line-height: 0.95;
}

.result-hero p {
  color: rgba(255, 255, 255, 0.78);
  margin: 14px 0 0;
}

.metric-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.metric {
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(30, 37, 40, 0.1);
  border-radius: var(--radius);
  padding: 16px;
}

.metric span {
  color: var(--muted);
  display: block;
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.metric strong {
  display: block;
  font-size: clamp(1.25rem, 3vw, 1.85rem);
  line-height: 1.05;
  overflow-wrap: anywhere;
}

.projection-panel {
  overflow: hidden;
}

.projection-bars {
  align-items: end;
  display: grid;
  gap: 12px;
  grid-auto-flow: column;
  grid-auto-columns: minmax(74px, 1fr);
  grid-template-columns: none;
  min-height: 250px;
  overflow-x: auto;
  padding: 18px;
}

.projection-item {
  align-items: center;
  display: grid;
  gap: 8px;
  min-width: 44px;
  text-align: center;
}

.projection-track {
  align-items: end;
  background: rgba(47, 111, 94, 0.12);
  border: 1px solid rgba(47, 111, 94, 0.22);
  border-radius: 6px;
  display: flex;
  height: 150px;
  overflow: hidden;
}

.projection-bar {
  background: linear-gradient(180deg, var(--sun), var(--coral));
  border-radius: 5px 5px 0 0;
  display: block;
  width: 100%;
}

.projection-item strong {
  font-size: 0.78rem;
  white-space: nowrap;
}

.projection-item span {
  color: var(--muted);
  font-size: 0.82rem;
}

@media (max-width: 900px) {
  .tool-intro,
  .tool-grid,
  .calculator-layout {
    grid-template-columns: 1fr;
  }

  .preview-panel {
    min-height: auto;
  }

  .canvas-stage {
    min-height: 380px;
  }

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

@media (max-width: 560px) {
  .nav,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .split,
  .actions {
    grid-template-columns: 1fr;
  }

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

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