:root{font-family:system-ui,-apple-system,"Segoe UI","Yu Gothic UI",sans-serif;color:#172033;background:#f4f6f9;font-size:16px;line-height:1.55}*{box-sizing:border-box}body{margin:0;min-height:100vh}button,input,select{font:inherit}button{cursor:pointer}.shell{width:min(1120px,100%);margin:auto;padding:24px}header{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:26px}h1{font-size:clamp(1.5rem,4vw,2.35rem);margin:0}h2{font-size:1.2rem;margin:0 0 16px}.version{margin:0;color:#6b7280}.privacy{padding:10px 14px;border-radius:999px;background:#e8f5ef;color:#17603a;font-weight:700}.privacy.small{font-size:.88rem;padding:6px 10px}.hero{display:grid;grid-template-columns:1fr 1fr;gap:18px}.mode-card{min-height:190px;border:1px solid #d9dee8;border-radius:20px;background:white;padding:28px;text-align:left;box-shadow:0 6px 24px rgba(20,30,55,.06);transition:.15s}.mode-card:hover{transform:translateY(-2px);box-shadow:0 10px 32px rgba(20,30,55,.10)}.mode-card b{display:block;font-size:1.45rem;margin-bottom:8px}.mode-card span{color:#596274}.security{margin-top:22px;background:white;border:1px solid #dfe3ea;padding:14px 18px;border-radius:14px}.sub{justify-content:flex-start}.back{border:0;background:#fff;border-radius:12px;padding:10px 14px;box-shadow:0 2px 10px rgba(0,0,0,.07)}.panel{background:#fff;border:1px solid #dfe3ea;border-radius:18px;padding:20px;box-shadow:0 5px 18px rgba(20,30,55,.05)}.drop{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:150px;border:2px dashed #b8c0cd;border-radius:14px;gap:6px;cursor:pointer}.drop b{font-size:1.2rem}.drop input{margin-top:10px;max-width:100%}.status{padding:10px 12px;border-radius:10px;margin:12px 0 0}.status.info{background:#eef4ff}.status.ok{background:#eaf8ef;color:#17603a}.status.warn{background:#fff6dc;color:#754c00}.status.err{background:#fff0f0;color:#a12222}.hidden{display:none!important}.work-grid,.text-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(330px,.75fr);gap:18px;margin-top:18px}.canvas-wrap{position:relative;width:100%;overflow:hidden;border-radius:12px;background:#f8fafc}.canvas-wrap canvas{display:block;max-width:100%;height:auto}.canvas-wrap #overlay-canvas{position:absolute;inset:0;width:100%;height:100%;touch-action:none}.preview{display:grid;place-items:center;min-height:320px;border-radius:14px;overflow:auto}.checker{background-color:#fff;background-image:linear-gradient(45deg,#e9edf2 25%,transparent 25%),linear-gradient(-45deg,#e9edf2 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e9edf2 75%),linear-gradient(-45deg,transparent 75%,#e9edf2 75%);background-size:24px 24px;background-position:0 0,0 12px,12px -12px,-12px 0}.preview canvas{max-width:92%;max-height:440px}.panel label{display:block;margin:14px 0;font-weight:650}.panel input[type=range]{width:min(360px,100%);vertical-align:middle}.row{display:flex;gap:16px;flex-wrap:wrap}.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.chip{border:1px solid #ccd3de;background:#fff;border-radius:999px;padding:7px 11px}.primary{width:100%;border:0;border-radius:12px;background:#b3261e;color:#fff;font-weight:800;font-size:1.08rem;padding:14px;margin-top:14px}.hint{color:#667085;font-size:.9rem}.controls input[type=text],.controls input:not([type]),.controls select,#seal-text,#size,#font,#dpi,#seal-finish{min-height:44px;border:1px solid #cfd5df;border-radius:10px;padding:8px 11px;font-size:1.05rem}.controls #seal-text{width:100%;font-size:1.25rem}.seg{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin-top:6px}.seg button{border:1px solid #cfd5df;background:white;border-radius:10px;padding:10px}.seg button.active{background:#172033;color:white}.group{margin:14px 0;font-weight:650}.sticky{align-self:start;position:sticky;top:16px}details summary{cursor:pointer;font-weight:700}.small{font-size:.9rem}.row label{font-weight:500}.controls label{font-weight:700}.controls input[type=color]{width:52px;height:42px;border:0;background:transparent;vertical-align:middle}@media(max-width:760px){.shell{padding:14px}.hero,.work-grid,.text-grid{grid-template-columns:1fr}.mode-card{min-height:130px;padding:20px}header{align-items:flex-start;flex-direction:column}.privacy{border-radius:12px}.sticky{position:static}.preview{min-height:250px}.row{gap:6px}.panel{padding:16px}}
.secondary{border:1px solid #cfd5df;background:#fff;border-radius:10px;padding:9px 12px;font-weight:700}.panel select{min-height:42px;border:1px solid #cfd5df;border-radius:9px;padding:6px 9px;background:#fff}
.share-box{margin-top:14px;padding:12px;border:1px solid #e0e5ec;border-radius:12px;background:#fafbfc}.share-box .secondary{width:100%}.share-box .hint{margin:8px 0 0}.secondary:disabled{opacity:.48;cursor:not-allowed}

.drop.dragover{border-color:#2563eb;background:#eff6ff;box-shadow:inset 0 0 0 2px rgba(37,99,235,.12)}
.drop .small{color:#596274;font-weight:600}

.license-box{margin-top:16px;border:1px solid #e0e5ec;border-radius:12px;background:#fafbfc;padding:10px 12px}
.license-box summary{font-size:.98rem}
.license-list{display:grid;gap:10px;margin-top:10px}
.license-card{border:1px solid #e4e8ef;background:#fff;border-radius:10px;padding:10px 12px;font-size:.92rem}
.license-card b{display:block;margin-bottom:4px}
.hero{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.controls output{display:inline-block;min-width:3ch;margin-left:8px;font-weight:800;color:#7f1d1d}
.checkline{display:flex!important;align-items:center;gap:8px;font-weight:700!important}
.checkline input{width:18px;height:18px}
.meta-box{white-space:pre-wrap;word-break:break-word;margin-top:12px;padding:12px;border-radius:10px;background:#f8fafc;border:1px solid #dfe3ea;font-family:ui-monospace,Consolas,monospace;font-size:.88rem}
.license-card a{color:#175cd3}.license-card code{font-size:.88em}.license-card .attribution{margin-top:6px;color:#475467}
.seg button:disabled{opacity:.45;cursor:not-allowed}
.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:14px}.tool-grid .secondary{width:100%}.controls hr{border:0;border-top:1px solid #e5e7eb;margin:18px 0 12px}.controls b{display:block;margin-top:4px}.sticky h3{font-size:1rem;margin:18px 0 4px}#compare-panel{margin-top:16px;border-top:1px solid #e5e7eb;padding-top:12px}@media(max-width:560px){.tool-grid{grid-template-columns:1fr}}

/* v0.1.14: progressive disclosure for the feature-rich text seal editor */
.compact-controls{padding-top:16px}.control-header{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:14px}.control-header h2{margin:0 0 2px}.compact-hint{margin:0}.reset-options{white-space:nowrap;color:#7f1d1d;border-color:#e4b9b9;background:#fffafa}.reset-options:hover{background:#fff2f2}
.basic-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0 14px}.basic-grid .span-2{grid-column:1/-1}.basic-grid label{margin:8px 0}.shape-group{margin-top:10px;margin-bottom:12px}.settings-stack{display:grid;gap:9px;margin-top:10px}.settings-card{border:1px solid #dfe3ea;border-radius:12px;background:#fbfcfe;overflow:hidden;padding:0}.settings-card>summary{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 13px;list-style:none;user-select:none}.settings-card>summary::-webkit-details-marker{display:none}.settings-card>summary::after{content:'＋';font-size:1.08rem;line-height:1;color:#667085;margin-left:auto}.settings-card[open]>summary::after{content:'−'}.settings-card>summary>span{font-weight:800}.settings-card>summary>small{color:#667085;font-weight:600;font-size:.8rem;white-space:nowrap}.settings-card[open]>summary{border-bottom:1px solid #e8ebf0;background:#fff}.settings-body{padding:5px 13px 13px}.settings-body label{margin:11px 0}.section-title{font-weight:800;font-size:.92rem;margin:9px 0 2px;color:#344054}.section-title.separated{border-top:1px solid #e7eaf0;padding-top:12px;margin-top:14px}.tools-card .settings-body{padding-top:12px}.tools-card .license-box{margin-bottom:0}.compact-controls .hint{margin-top:6px;margin-bottom:6px}.compact-controls #kind-note:empty,.compact-controls #font-note:empty,.compact-controls #font-license-note:empty{display:none}
@media(max-width:760px){.control-header{align-items:stretch;flex-direction:column}.reset-options{width:100%}.basic-grid{grid-template-columns:1fr}.basic-grid .span-2{grid-column:auto}.settings-card>summary{align-items:flex-start}.settings-card>summary>small{white-space:normal;text-align:right;max-width:48%}}

/* v0.1.15: inline help tips and unified corporate-seal guidance */
.help-tip{display:inline-grid;place-items:center;width:1.2rem;height:1.2rem;margin-left:.35rem;border-radius:999px;border:1px solid #d0d5dd;background:#fff;color:#475467;font-size:.78rem;font-weight:800;line-height:1;vertical-align:middle;cursor:help}.help-tip:focus,.help-tip:hover{outline:none;border-color:#98a2b3;background:#f8fafc;box-shadow:0 0 0 3px rgba(152,162,179,.18)}.shape-group>span{display:inline-flex;align-items:center;gap:4px}.control-header .reset-options{align-self:flex-start}

/* v0.1.16: beginner/detail help mode and preset recommendations */
.header-actions{display:flex;align-items:flex-end;gap:10px;flex-wrap:wrap;justify-content:flex-end}.help-mode-control{margin:0!important;font-size:.86rem;color:#475467;font-weight:700!important}.help-mode-control select{margin-left:5px;min-height:38px!important;font-size:.92rem!important}.help-mode-note{margin:0 0 12px;padding:8px 10px;border-radius:9px;background:#f8fafc;border:1px solid #e4e7ec;color:#475467;font-size:.86rem}.preset-recommend{margin:-6px 0 10px;padding:7px 9px;border-left:3px solid #b3261e;border-radius:0 8px 8px 0;background:#fff7f6;color:#66403c;font-size:.84rem}.preset-recommend:empty{display:none}.settings-body .preset-recommend+label{margin-top:14px}
@media(max-width:760px){.header-actions{width:100%;align-items:stretch;flex-direction:column}.help-mode-control{display:flex!important;align-items:center;justify-content:space-between}.help-mode-control select{min-width:140px}.header-actions .reset-options{width:100%}}
.help-inline-popup{display:block;margin:-5px 0 9px;padding:8px 10px;border-radius:9px;background:#172033;color:#fff;font-size:.84rem;font-weight:500;line-height:1.55;box-shadow:0 5px 16px rgba(23,32,51,.16)}

/* v0.2.0: workshop-grade editor tools */
.history-buttons{display:flex;gap:6px;align-items:center}.history-buttons .secondary{padding:7px 10px}.quick-preset{margin:10px 0 14px;padding:12px;border:1px solid #dfe3ea;border-radius:12px;background:#f8fafc}.quick-preset label{margin:0 0 8px}.quick-preset .secondary{width:100%}.corporate-layout{margin-top:10px;padding:10px 12px;border-radius:10px;background:#fff;border:1px dashed #d0d5dd}.candidate-tools{display:flex;align-items:end;gap:10px;flex-wrap:wrap}.candidate-tools label{margin-bottom:0}.candidate-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:10px}.candidate-card{display:flex;flex-direction:column;gap:5px;align-items:center;border:1px solid #d0d5dd;border-radius:10px;padding:8px;background:#fff}.candidate-card:hover{border-color:#98a2b3;background:#f9fafb}.candidate-card canvas{display:block;width:100%;max-width:120px;height:auto}.candidate-card span{font-size:.78rem;color:#475467;font-weight:700}.calibration-scroll{width:100%;max-width:100%;overflow-x:auto;overscroll-behavior-inline:contain}.calibration-card{height:54px;border:2px solid #667085;border-radius:6px;display:grid;place-items:center;background:repeating-linear-gradient(45deg,#fff,#fff 8px,#f2f4f7 8px,#f2f4f7 16px);font-size:.78rem;color:#475467;max-width:none;margin:6px 0 10px;white-space:nowrap;box-sizing:border-box}.seal-preview{overflow:auto;padding:12px}.seal-stage{position:relative;display:inline-block;width:min(92%,440px);flex:0 0 auto}.seal-stage #seal-canvas{display:block;width:100%;height:auto;max-width:none;max-height:none}.seal-stage .safe-zone-canvas{position:absolute;inset:0;width:100%;height:100%;max-width:none;max-height:none;display:block;pointer-events:none}.safety-warnings{display:grid;gap:5px;margin:10px 0}.safety-warn,.safety-info{padding:7px 9px;border-radius:8px;font-size:.86rem}.safety-warn{background:#fff6dc;color:#754c00}.safety-info{background:#eef7f2;color:#17603a}.copy-png{width:100%;margin-top:8px}.compare-swipe{position:relative;width:100%;max-width:440px;margin:8px auto;background:transparent;overflow:hidden;border-radius:10px}.compare-swipe canvas{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}.compare-swipe #compare-current{position:relative;display:block}.compare-divider{position:absolute;top:0;bottom:0;width:2px;background:#2563eb;transform:translateX(-1px);pointer-events:none;box-shadow:0 0 0 1px rgba(255,255,255,.7)}#compare-slider{width:100%}.preset-recommend{font-size:.84rem;color:#475467;background:#f8fafc;border-left:3px solid #98a2b3;padding:6px 8px;margin:4px 0 8px}.header-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.help-mode-control{margin:0!important}.settings-body output{min-width:4ch}
@media(max-width:760px){.candidate-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.history-buttons{width:100%}.history-buttons .secondary{flex:1}.header-actions{width:100%}.help-mode-control{width:100%}.help-mode-control select{width:100%}.seal-stage{width:min(96%,420px)}}
@media(max-width:430px){.candidate-grid{grid-template-columns:1fr 1fr}.candidate-card{padding:6px}}

@media(max-width:760px){.text-grid>.sticky{order:-1}.seal-preview{min-height:210px}.seal-preview .seal-stage{width:min(96%,300px);max-height:none}.text-grid>.sticky .primary{margin-top:10px}}

/* UX hardening: consistent touch targets and keyboard focus */
button,.panel select{min-height:44px}button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid rgba(37,99,235,.32);outline-offset:2px}


/* v0.2.10: unobtrusive sponsored slots on home and work-page bottoms */
.site-ad{margin:18px auto 0;max-width:720px}.site-ad--work{margin-top:28px;margin-bottom:4px}.site-ad[hidden]{display:none!important}.ad-slot{padding:10px 12px;border:1px solid #e4e7ec;border-radius:12px;background:#fff}.ad-slot__disclosure{margin-bottom:5px;color:#667085;font-size:.72rem;font-weight:700}.ad-slot__items{display:grid;gap:8px}.ad-card{min-width:0}.ad-card__link{display:block;padding:8px 10px;border-radius:9px;color:inherit;text-decoration:none;background:#fafbfc}.ad-card__link:hover{background:#f4f6f8}.ad-card__link:focus-visible{outline:3px solid rgba(37,99,235,.32);outline-offset:2px}.ad-card__body{display:grid;gap:2px}.ad-card__name{font-size:.9rem;font-weight:750;color:#344054}.ad-card__description{font-size:.8rem;color:#667085}.ad-slot__destination{margin-top:5px;color:#98a2b3;font-size:.7rem}.ad-card__image{display:block;max-width:100%;height:auto}
@media(max-width:560px){.site-ad{margin-top:14px}.ad-slot{padding:9px 10px}.ad-card__description{font-size:.76rem}}

/* v0.2.13: compact disclosure for generative-AI-assisted production */
.ai-production-disclosure{max-width:720px;margin:8px auto 0;padding:0 4px;color:#475467;font-size:.8rem;font-weight:600;line-height:1.55}
@media(max-width:560px){.ai-production-disclosure{font-size:.78rem;margin-top:7px}}

/* v0.2.14: substantive help content for discoverability and user guidance */
.content-guide{margin-top:22px;border:1px solid #dfe3ea;border-radius:16px;background:#fff;padding:18px 20px;box-shadow:0 4px 16px rgba(20,30,55,.035)}
.content-guide h2{margin:0 0 10px;font-size:1.16rem}.content-guide h3{margin:0 0 5px;font-size:1rem}.content-guide p{margin:8px 0;color:#344054}.content-guide__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:12px}.content-guide__grid article{min-width:0;border:1px solid #e7eaf0;border-radius:12px;background:#fafbfc;padding:13px}.content-guide__grid article p{margin:0;font-size:.92rem;color:#475467}.content-guide__steps{display:grid;gap:10px;margin:10px 0 0;padding:0;list-style:none;counter-reset:guide-step}.content-guide__steps li{counter-increment:guide-step;display:grid;grid-template-columns:auto 1fr;gap:4px 10px;align-items:start}.content-guide__steps li::before{content:counter(guide-step);grid-row:1/3;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#eef2f7;color:#344054;font-weight:800}.content-guide__steps b{line-height:1.4}.content-guide__steps span{color:#475467}.content-guide--work{max-width:880px;margin-left:auto;margin-right:auto}.content-guide--work p:last-child{margin-bottom:0}
@media(max-width:760px){.content-guide{padding:15px 16px;margin-top:16px}.content-guide__grid{grid-template-columns:1fr}.content-guide h2{font-size:1.08rem}.content-guide p,.content-guide__steps span{font-size:.93rem}}