style.css

:root {
  --page-max-width: 1120px;
  --page-gutter: 24px;
  --color-primary: #365747;
  --color-primary-hover: #294536;
  --color-on-primary: #fff;
  --color-text: #282e29;
  --color-text-muted: #737970;
  --color-border: #dedfd6;
  --color-canvas: #f8f7f4;
  --color-surface: #fffefa;
  --color-surface-subtle: #efefe8;
  --color-focus: #365747;
  --color-danger: #a33b2f;
  color-scheme: light;
}
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { line-height: 1.65; }
button, input, select, textarea { font: inherit; }
button, a, input, select, textarea, summary { -webkit-tap-highlight-color: transparent; }
a { text-underline-offset: 4px; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .5; }
button:focus-visible, a:focus-visible, summary:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 4px; }
button, .button { min-height: 44px; }
h1, h2, h3, p, figure { margin: 0; }
svg { width: 24px; height: 24px; flex-shrink: 0; }
.loading { padding: 48px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 88px; }
.brand { display: inline-flex; gap: 10px; align-items: center; text-decoration: none; font-size: 20px; letter-spacing: -.7px; }
.brand svg { width: 29px; height: 29px; }
.brand-dot { color: var(--color-primary); }
.site-header nav { display: flex; align-items: center; gap: 30px; font-size: 13px; }
.site-header nav a { text-decoration: none; }
.site-header nav a:hover, .text-link:hover { color: var(--color-primary); text-decoration: underline; }
.repo-link { border-left: 1px solid var(--color-border); padding-left: 30px; }
.hero { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; padding: 70px 0 64px; }
.eyebrow { font-size: 10px; letter-spacing: .13em; }
.hero .eyebrow { display: flex; align-items: center; gap: 8px; letter-spacing: .08em; }
.live-dot { width: 6px; height: 6px; background: var(--color-primary); border-radius: 50%; flex-shrink: 0; }
.hero h1 { font-family: var(--font-family), "PingFang SC", sans-serif; font-size: clamp(50px, 5.7vw, 76px); line-height: 1.21; letter-spacing: -.07em; margin: 26px 0; font-weight: 700; }
.hero h1 span { color: var(--color-primary); }
.hero-description { color: var(--color-text-muted); font-size: 15px; line-height: 1.95; max-width: 360px; }
.hero-actions { display: flex; gap: 25px; align-items: center; flex-wrap: wrap; margin-top: 29px; }
.hero-actions .button { gap: 30px; padding: 12px 22px; }
.text-link { font-size: 13px; text-decoration: none; }
.hero-note { margin-top: 24px; font-size: 11px; color: var(--color-text-muted); letter-spacing: .05em; }
.hero-visual { position: relative; background: #eeeee7; border: 1px solid var(--color-border); padding: 20px 22px 16px; transform: rotate(2deg); }
.photo-label { font-size: 9px; letter-spacing: .14em; color: #737970; }
.hero-visual img { display: block; width: 100%; height: 318px; object-fit: contain; mix-blend-mode: multiply; margin: 10px 0; }
.hero-visual figcaption { display: flex; gap: 10px; justify-content: space-between; border-top: 1px solid #d3d4c9; padding-top: 13px; color: #737970; font-size: 9px; }
.spec-strip { display: grid; grid-template-columns: repeat(3, 1fr) .9fr; padding: 25px 0; border-block: 1px solid var(--color-border); }
.spec-strip > * { border-right: 1px solid var(--color-border); padding-left: 26px; }
.spec-strip > :first-child { padding-left: 0; }
.spec-strip > :last-child { border: 0; text-decoration: none; color: var(--color-text-muted); font-size: 11px; }
.spec-strip strong { font-size: 22px; letter-spacing: -.04em; display: block; line-height: 1.4; }
.spec-strip strong span { font-size: 13px; font-weight: 400; }
.spec-strip div > span { color: var(--color-text-muted); font-size: 11px; }
.spec-strip a strong { font-size: 15px; color: var(--color-primary); margin-top: 6px; }
.workbench { padding-top: 78px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 29px; }
.section-heading h2 { font-family: var(--font-family), sans-serif; margin-top: 10px; font-size: 30px; font-weight: 600; letter-spacing: -.06em; }
.section-heading h2 span { color: var(--color-primary); }
.section-heading > p { color: var(--color-text-muted); font-size: 13px; padding-bottom: 4px; }
.connection-bar { padding: 20px 24px; border: 1px solid var(--color-border); display: flex; align-items: center; justify-content: space-between; gap: 20px; background: var(--color-surface); }
.connection-info { display: flex; align-items: center; gap: 14px; min-width: 0; }
.connection-info strong { font-size: 14px; overflow-wrap: anywhere; }
.connection-info small { display: block; color: var(--color-text-muted); margin-top: 2px; font-size: 11px; }
.connection-bar .button { flex-shrink: 0; font-size: 12px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #b7bcb3; flex-shrink: 0; }
.status-dot.connected { background: #497d50; box-shadow: 0 0 0 4px #eaf0e5; }
.compatibility { background: #f1ede0; color: #6e6142; padding: 13px 20px; border: 1px solid #dfd6bf; border-top: 0; font-size: 12px; }
.compatibility a { margin-left: 5px; }
.printer-status { display: flex; gap: 24px; flex-wrap: wrap; margin: 0; padding: 12px 24px; border-inline: 1px solid var(--color-border); background: #eef1e9; font-size: 11px; }
.printer-status div { display: flex; gap: 8px; }
.printer-status dt { color: var(--color-text-muted); }
.printer-status dd { margin: 0; }
.status-error { color: var(--color-danger); }
.studio-grid { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--color-border); border-top: 0; }
.editor-panel { padding: 26px; min-width: 0; background: var(--color-surface); }
.mode-switch { display: flex; border-bottom: 1px solid var(--color-border); gap: 24px; margin-bottom: 24px; }
.mode-switch button { padding: 0 0 12px; border: 0; border-bottom: 2px solid transparent; background: transparent; border-radius: 0; font-size: 13px; color: var(--color-text-muted); white-space: nowrap; }
.mode-switch button[aria-pressed="true"] { color: var(--color-primary); border-color: var(--color-primary); font-weight: 600; }
.editor-fields { padding: 0; border: 0; margin: 0; min-width: 0; }
.field-label, .range-label { display: flex; align-items: center; justify-content: space-between; font-size: 12px; margin-bottom: 10px; gap: 8px; }
.field-label span, output { color: var(--color-text-muted); font-size: 11px; font-weight: 400; }
textarea, select { width: 100%; color: var(--color-text); border: 1px solid var(--color-border); background: var(--color-surface); border-radius: 3px; }
textarea { padding: 15px; font-size: 15px; line-height: 1.8; min-height: 216px; resize: vertical; }
textarea:focus, select:focus { outline: 2px solid #b3c2ad; outline-offset: 1px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 15px; }
.field-row label { display: block; font-size: 12px; }
select { display: block; padding: 8px 10px; min-height: 44px; margin-top: 7px; }
.density-control { margin-top: 25px; padding-top: 22px; border-top: 1px solid var(--color-border); }
input[type="range"] { display: block; width: 100%; accent-color: var(--color-primary); min-height: 28px; padding: 0; margin: 0; }
.range-caption { display: flex; justify-content: space-between; color: var(--color-text-muted); font-size: 10px; margin-top: 3px; }
.print-actions { display: flex; gap: 10px; margin-top: 24px; }
.print-button { width: 100%; gap: 12px; }
.print-button span { margin-left: auto; }
.print-button svg { width: 18px; }
.job-message { min-height: 36px; font-size: 11px; color: var(--color-text-muted); margin-top: 13px; overflow-wrap: anywhere; }
.error { color: var(--color-danger); }
progress { display: block; width: 100%; height: 4px; margin-top: 12px; accent-color: var(--color-primary); }
.preview-panel { padding: 26px; background-color: #eeeee8; background-image: radial-gradient(#c9ccbf .65px, transparent .65px); background-size: 12px 12px; border-left: 1px solid var(--color-border); display: flex; flex-direction: column; min-width: 0; }
.preview-heading { display: flex; justify-content: space-between; gap: 10px; align-items: center; font-size: 10px; color: #737970; }
.paper-stage { min-height: 385px; max-height: 560px; flex: 1; overflow: auto; padding: 30px 12px 24px; }
.paper { position: relative; width: 100%; max-width: 320px; margin-inline: auto; background: #fffefa; padding: 18px 14px 22px; box-shadow: 1px 5px 15px #30372812; color: #343a33; }
.paper::after { position: absolute; content: ''; left: 0; right: 0; bottom: -7px; height: 8px; background: linear-gradient(135deg, #fffefa 25%, transparent 25%) -8px 0, linear-gradient(225deg, #fffefa 25%, transparent 25%) -8px 0; background-size: 16px 16px; }
.paper-top { display: flex; justify-content: space-between; border-bottom: 1px dashed #d7d8ce; padding-bottom: 10px; margin-bottom: 14px; font-size: 9px; letter-spacing: .08em; }
.paper-top span:last-child { font-size: 6px; letter-spacing: 2px; }
.paper canvas { display: block; width: 100%; height: auto; image-rendering: pixelated; }
.paper canvas[hidden] { display: none; }
.paper-bottom { margin-top: 16px; padding-top: 10px; border-top: 1px dashed #d7d8ce; font-size: 8px; color: #979b90; text-align: center; letter-spacing: .12em; }
.preview-note { color: #737970; font-size: 10px; text-align: center; margin-top: 18px; }
.empty-preview { text-align: center; padding: 60px 0; color: #8a8f83; white-space: pre-line; font-size: 14px; }
.image-picker { display: flex; align-items: center; justify-content: center; flex-direction: column; text-align: center; padding: 20px 14px; border: 1px dashed var(--color-border); min-height: 236px; gap: 7px; }
.upload-mark { color: var(--color-primary); font-size: 28px; line-height: 1; }
.image-picker label { font-size: 14px; }
.image-picker p, .image-picker small { font-size: 11px; color: var(--color-text-muted); overflow-wrap: anywhere; max-width: 100%; }
.image-picker input { width: 100%; max-width: 260px; font-size: 12px; min-height: 44px; padding-top: 6px; }
.checkbox-label { display: flex; align-items: center; gap: 8px; font-size: 12px; margin: 15px 0; }
.checkbox-label input { accent-color: var(--color-primary); width: 17px; height: 17px; }
.field-help { color: var(--color-text-muted); font-size: 11px; margin-top: 8px; }
.test-description { text-align: center; padding: 55px 0; }
.test-description svg { width: 36px; height: 36px; color: var(--color-primary); }
.test-description h3 { font-family: inherit; font-size: 17px; margin: 15px 0 10px; }
.test-description p { font-size: 13px; color: var(--color-text-muted); }
.browser-note { font-size: 10px; margin-top: 15px; color: var(--color-text-muted); }
.firmware-section { padding-top: 78px; }
.firmware-notice { padding: 14px 20px; background: #f1ede0; border: 1px solid #dfd6bf; font-size: 12px; color: #6e6142; margin-bottom: 18px; }
.firmware-grid { display: grid; grid-template-columns: 1.25fr 1fr; border: 1px solid var(--color-border); }
.firmware-panel { padding: 28px; min-width: 0; background: var(--color-surface); }
.firmware-target { color: var(--color-primary); font-size: 12px; margin-bottom: 22px; }
.firmware-fields { border: 0; margin: 0; padding: 0; min-width: 0; font-size: 12px; }
.firmware-choices { display: grid; gap: 12px; margin: 24px 0; }
.firmware-choices label { display: flex; gap: 12px; align-items: flex-start; border: 1px solid var(--color-border); padding: 16px; cursor: pointer; }
.firmware-choices input, .firmware-ack input { flex-shrink: 0; accent-color: var(--color-primary); width: 17px; height: 17px; margin-top: 3px; }
.firmware-choices label:has(input:checked) { border-color: var(--color-primary); background: #eef1e9; }
.firmware-choices strong { font-size: 13px; display: block; }
.firmware-choices small, .firmware-local small { display: block; color: var(--color-text-muted); margin-top: 4px; line-height: 1.8; font-size: 11px; }
.firmware-ack { display: flex; gap: 10px; font-size: 12px; margin-block: 20px; }
.firmware-actions { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.firmware-actions .button { font-size: 12px; }
.firmware-actions a, .firmware-meta, .firmware-guide > a { font-size: 11px; }
.firmware-local { display: block; margin-top: 22px; }
.firmware-local input { display: block; width: 100%; max-width: 100%; padding-block: 10px; min-height: 44px; }
.firmware-meta { margin-top: 22px; color: var(--color-text-muted); overflow-wrap: anywhere; }
.firmware-retry { color: var(--color-primary); background: transparent; border: 0; padding: 5px 8px; text-decoration: underline; }
.firmware-guide { padding: 28px 32px; border-left: 1px solid var(--color-border); background: var(--color-surface-subtle); }
.firmware-guide h3 { font-family: inherit; font-size: 23px; margin: 14px 0 25px; letter-spacing: -.04em; }
.firmware-guide ol { padding-left: 20px; margin: 0 0 24px; }
.firmware-guide li { padding-left: 8px; margin-bottom: 22px; font-size: 13px; }
.firmware-guide li::marker { color: var(--color-primary); }
.firmware-guide li p { font-size: 12px; line-height: 1.9; color: var(--color-text-muted); margin-top: 6px; }
.firmware-progress > span { display: block; text-align: right; color: var(--color-text-muted); font-size: 11px; margin-top: 6px; }
.firmware-progress pre { max-height: 240px; overflow: auto; white-space: pre-wrap; overflow-wrap: anywhere; background: #efefe8; padding: 12px; font-size: 11px; }
.project-section { margin-top: 80px; }
.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--color-border); }
.project-grid article { padding: 30px 28px; border-right: 1px solid var(--color-border); }
.project-grid article:first-child { padding-left: 0; }
.project-grid article:last-child { border: 0; padding-right: 0; }
.chapter { font-size: 10px; color: var(--color-text-muted); letter-spacing: .08em; }
.project-grid h3 { font-size: 20px; font-family: inherit; letter-spacing: -.04em; margin: 16px 0 12px; }
.project-grid p { font-size: 13px; color: var(--color-text-muted); line-height: 1.9; }
.project-grid a { font-size: 12px; display: inline-block; margin-top: 22px; color: var(--color-primary); text-decoration: none; }
.faq-section { display: grid; grid-template-columns: 1fr 2fr; margin: 65px 0 75px; column-gap: 70px; }
.faq-section h2 { grid-row: span 4; font-size: 27px; font-family: inherit; letter-spacing: -.05em; padding-top: 10px; }
details { border: 0; border-bottom: 1px solid var(--color-border); background: transparent; border-radius: 0; padding: 0; margin: 0; }
summary { cursor: pointer; padding: 18px 0; font-size: 13px; min-height: 48px; }
details p { padding: 0 0 20px; color: var(--color-text-muted); font-size: 12px; line-height: 1.9; }
.site-footer { border-top: 1px solid var(--color-border); font-size: 11px; }
.site-footer .brand { font-size: 15px; color: var(--color-text); }
.site-footer .brand svg { width: 23px; height: 23px; }
.site-footer > a:last-child { text-decoration: none; }
@media (max-width: 760px) {
  .hero { gap: 25px; padding-top: 44px; }
  .hero h1 { font-size: 56px; }
  .hero .eyebrow { font-size: 8px; }
  .hero-visual { padding: 16px; }
  .hero-visual img { height: 270px; }
  .photo-label { font-size: 7px; }
  .hero-visual figcaption span:last-child { display: none; }
  .editor-panel, .preview-panel { padding: 20px; }
  .mode-switch { gap: 18px; }
  .section-heading h2 { font-size: 27px; }
}
@media (max-width: 600px) {
  :root { --page-gutter: 20px; }
  .site-header { min-height: 76px; gap: 12px; }
  .brand { font-size: 18px; gap: 7px; }
  .site-header nav { gap: 12px; font-size: 11px; }
  .site-header nav .about-link { display: none; }
  .repo-link { border: 0; padding: 0; }
  .hero { grid-template-columns: 1fr; padding: 40px 0 38px; gap: 32px; }
  .hero h1 { font-size: 62px; margin: 20px 0; }
  .hero .eyebrow { font-size: 9px; }
  .hero-description { font-size: 14px; max-width: 340px; }
  .hero-visual { transform: rotate(1deg); margin: 0 5px; }
  .hero-visual img { height: 250px; }
  .photo-label { font-size: 9px; }
  .hero-visual figcaption span:last-child { display: inline; }
  .spec-strip { grid-template-columns: 1fr 1fr; row-gap: 22px; padding-block: 22px; }
  .spec-strip > :nth-child(2) { border: 0; }
  .spec-strip > :nth-child(3) { padding-left: 0; }
  .spec-strip strong { font-size: 21px; }
  .spec-strip div > span { font-size: 10px; }
  .workbench { padding-top: 48px; }
  .firmware-section { padding-top: 48px; }
  .firmware-grid { grid-template-columns: 1fr; }
  .firmware-panel, .firmware-guide { padding: 22px 16px; }
  .firmware-guide { border-left: 0; border-top: 1px solid var(--color-border); }
  .firmware-guide h3 { font-size: 21px; }
  .section-heading { display: block; margin-bottom: 22px; }
  .section-heading h2 { font-size: 27px; }
  .section-heading > p { margin-top: 9px; font-size: 12px; }
  .connection-bar { padding: 16px; gap: 10px; align-items: flex-start; }
  .connection-info { gap: 10px; padding-top: 2px; }
  .connection-info .status-dot { margin-top: 8px; align-self: flex-start; }
  .connection-info small { font-size: 10px; }
  .connection-info strong { font-size: 12px; }
  .connection-bar .button { font-size: 11px; padding-inline: 12px; }
  .compatibility { padding: 12px 16px; font-size: 11px; }
  .printer-status { padding: 12px 16px; gap: 8px 18px; }
  .studio-grid { grid-template-columns: 1fr; }
  .editor-panel { padding: 20px 16px 16px; }
  .preview-panel { border-left: 0; border-top: 1px solid var(--color-border); padding: 22px 16px; }
  .paper-stage { min-height: 300px; max-height: 480px; }
  .preview-panel .paper { max-width: 290px; }
  textarea, select { font-size: 16px; }
  .job-message { min-height: 0; }
  .project-section { margin-top: 48px; }
  .project-grid { grid-template-columns: 1fr; }
  .project-grid article, .project-grid article:first-child, .project-grid article:last-child { padding: 24px 0; border-right: 0; }
  .project-grid article + article { border-top: 1px solid var(--color-border); }
  .project-grid h3 { margin-top: 10px; }
  .project-grid a { margin-top: 14px; }
  .faq-section { display: block; margin: 45px 0; }
  .faq-section h2 { font-size: 25px; margin-bottom: 14px; }
  .site-footer { gap: 10px; padding-block: 24px; }
}