/* UPTHOS Tools design system — style B "Clarity", light + dark.
   Every page links this file. Page-specific rules stay in a small inline <style>.
   Tokens first; components below use tokens only, so dark mode is a token swap. */

:root{
  --bg:#ffffff;
  --bg-subtle:#f8fafc;
  --surface:#ffffff;
  --surface-2:#f8fafc;
  --border:#e5e7eb;
  --border-strong:#d1d5db;
  --text:#0f172a;
  --text-2:#475569;
  --text-3:#64748b;
  --ico-chevron:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");--ico-calendar:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='5' width='18' height='16' rx='1.5'/%3E%3Cpath d='M3 10h18M8 3v4M16 3v4'/%3E%3C/svg%3E");
  --accent:#1e3a8a;
  --accent-hover:#1e40af;
  --accent-text:#1e40af;
  --accent-bg:#eff4ff;
  --accent-border:#dbe5ff;
  --on-accent:#ffffff;
  --success:#067647;
  --success-bg:#ecfdf3;
  --success-border:#abefc6;
  --warn:#b54708;
  --warn-bg:#fffaeb;
  --warn-border:#fedf89;
  --danger:#b42318;
  --danger-bg:#fef3f2;
  --danger-border:#fecdca;
  --focus:#2563eb;
  --shadow-sm:0 1px 2px rgba(15,23,42,.06);
  --shadow-md:0 8px 24px -12px rgba(30,58,138,.28);
  --footer-bg:#0f172a;
  --footer-text:#94a3b8;
  --footer-strong:#ffffff;
  --footer-border:#1e293b;
  --brand-dot:#C46F20;
  --radius:14px;
  --radius-sm:10px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Inter,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",Roboto,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  color-scheme:light;
}

@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0b1120;--bg-subtle:#0f172a;--surface:#111a2e;--surface-2:#0f172a;
    --border:#1f2a40;--border-strong:#2d3a55;
    --text:#e6ebf5;--text-2:#b4bfd3;--text-3:#8b97ad;
  --ico-chevron:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238b97ad' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");--ico-calendar:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238b97ad' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='5' width='18' height='16' rx='1.5'/%3E%3Cpath d='M3 10h18M8 3v4M16 3v4'/%3E%3C/svg%3E");
    --ico-chevron:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238b97ad' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");--ico-calendar:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238b97ad' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='5' width='18' height='16' rx='1.5'/%3E%3Cpath d='M3 10h18M8 3v4M16 3v4'/%3E%3C/svg%3E");
    --brand-dot:#F2A045;--accent:#8fb0ff;--accent-hover:#a9c2ff;--accent-text:#a9c2ff;--accent-bg:#16233f;--accent-border:#26395f;--on-accent:#0b1120;
    --success:#6ee7a8;--success-bg:#0e2a1d;--success-border:#1d5a3b;
    --warn:#fdb35c;--warn-bg:#2d1f0b;--warn-border:#5c3d12;
    --danger:#ff9b8f;--danger-bg:#2e1414;--danger-border:#5e2424;
    --focus:#8fb0ff;
    --shadow-sm:0 1px 2px rgba(0,0,0,.4);--shadow-md:0 10px 28px -14px rgba(0,0,0,.7);
    --footer-bg:#070b16;--footer-text:#8b97ad;--footer-strong:#e6ebf5;--footer-border:#1a2338;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0b1120;--bg-subtle:#0f172a;--surface:#111a2e;--surface-2:#0f172a;
  --border:#1f2a40;--border-strong:#2d3a55;
  --text:#e6ebf5;--text-2:#b4bfd3;--text-3:#8b97ad;
  --brand-dot:#F2A045;--accent:#8fb0ff;--accent-hover:#a9c2ff;--accent-text:#a9c2ff;--accent-bg:#16233f;--accent-border:#26395f;--on-accent:#0b1120;
  --success:#6ee7a8;--success-bg:#0e2a1d;--success-border:#1d5a3b;
  --warn:#fdb35c;--warn-bg:#2d1f0b;--warn-border:#5c3d12;
  --danger:#ff9b8f;--danger-bg:#2e1414;--danger-border:#5e2424;
  --focus:#8fb0ff;
  --shadow-sm:0 1px 2px rgba(0,0,0,.4);--shadow-md:0 10px 28px -14px rgba(0,0,0,.7);
  --footer-bg:#070b16;--footer-text:#8b97ad;--footer-strong:#e6ebf5;--footer-border:#1a2338;
  color-scheme:dark;
}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box}
*{margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-padding-top:80px}
body{font-family:var(--font);font-size:16px;line-height:1.6;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
main{flex:1}
a{color:var(--accent-text);text-decoration:none}
a:hover{color:var(--accent-hover);text-decoration:underline;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:4px}
img,svg{display:block}
h1,h2,h3{color:var(--text);letter-spacing:-.02em}
h2{font-size:26px;line-height:1.25;font-weight:700}
h3{font-size:17px;line-height:1.35;font-weight:600}
p{color:var(--text-2)}
strong,b{color:var(--text);font-weight:600}
code{font-family:var(--mono);font-size:.9em;background:var(--surface-2);border:1px solid var(--border);border-radius:6px;padding:.05em .35em}
.num{font-variant-numeric:tabular-nums}
.muted{color:var(--text-3)}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
svg.ic{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
svg.ic-sm{width:16px;height:16px}

.container{width:100%;max-width:1080px;margin:0 auto;padding:0 24px}
.container.narrow{max-width:880px}
.section{padding:48px 0}
.section + .section{padding-top:8px}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px 24px;flex-wrap:wrap;margin-bottom:20px}
.section-head p{font-size:14px;color:var(--text-3)}
.stack > * + *{margin-top:16px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:40;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--border)}
.site-header .container{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.brand:hover{color:var(--text);text-decoration:none}
.brand svg{width:26px;height:26px;color:var(--text)}
.brand-dot{fill:var(--brand-dot)}
.brand em{font-style:normal;color:var(--accent-text)}
.site-nav{display:flex;gap:22px;flex:1}
.site-nav a{color:var(--text-2);font-size:14px;font-weight:500}
.site-nav a:hover,.site-nav a[aria-current="page"]{color:var(--text);text-decoration:none}
.header-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.lang-switch{display:flex;border:1px solid var(--border-strong);border-radius:8px;overflow:hidden;font-size:12px;font-weight:600}
.lang-switch a,.lang-switch span{padding:5px 9px;color:var(--text-3);line-height:1.4}
.lang-switch a:hover{color:var(--text);text-decoration:none;background:var(--surface-2)}
.lang-switch [aria-current="true"]{color:var(--text);background:var(--surface-2)}
.theme-toggle{display:flex;align-items:center;justify-content:center;width:34px;height:30px;border:1px solid var(--border-strong);border-radius:8px;background:transparent;color:var(--text-2);cursor:pointer}
.theme-toggle:hover{color:var(--text);background:var(--surface-2)}
.theme-toggle svg{width:17px;height:17px}
.theme-toggle .i-sun{display:none}
:root[data-theme="dark"] .theme-toggle .i-sun{display:block}
:root[data-theme="dark"] .theme-toggle .i-moon{display:none}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .theme-toggle .i-sun{display:block}
  :root:not([data-theme="light"]) .theme-toggle .i-moon{display:none}
}

/* ---------- hero ---------- */
.page-hero{background:linear-gradient(180deg,var(--bg-subtle) 0%,var(--bg) 100%);border-bottom:1px solid var(--border);padding:48px 0 36px}
.home-hero{padding:72px 0 56px}
.home-hero .container{display:grid;grid-template-columns:1.3fr 1fr;gap:48px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--accent-text);background:var(--accent-bg);border:1px solid var(--accent-border);border-radius:999px;padding:4px 12px;font-size:13px;font-weight:500;margin-bottom:16px}
.breadcrumb{font-size:13px;color:var(--text-3);margin-bottom:14px}
.breadcrumb a{color:var(--text-3)}
.page-hero h1{font-size:36px;line-height:1.15;font-weight:700;letter-spacing:-.03em;max-width:820px}
.home-hero h1{font-size:46px;line-height:1.1;font-weight:700;letter-spacing:-.035em}
.lead{font-size:18px;color:var(--text-2);max-width:680px;margin-top:14px}
.hero-meta{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:20px;font-size:14px;color:var(--text-2)}
.hero-meta span{display:inline-flex;align-items:center;gap:7px}
.hero-meta svg{color:var(--accent-text)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:var(--radius-sm);font:600 15px/1.2 var(--font);cursor:pointer;border:1px solid transparent;white-space:nowrap;transition:background .15s,border-color .15s,color .15s}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--accent);color:var(--on-accent);box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--accent-hover);color:var(--on-accent)}
.btn-secondary{background:var(--surface);color:var(--text);border-color:var(--border-strong)}
.btn-secondary:hover{background:var(--surface-2);color:var(--text)}
.btn-sm{padding:7px 12px;font-size:13px;border-radius:8px}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* ---------- cards & surfaces ---------- */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}
.card-pad{padding:22px}
.panel{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);padding:20px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.step{background:var(--surface-2);border:1px solid var(--border);border-radius:12px;padding:18px;color:var(--text)}
a.step:hover{text-decoration:none;border-color:var(--accent-border)}
.step-n{display:inline-block;font-size:12px;font-weight:700;color:var(--accent-text);background:var(--accent-bg);border-radius:6px;padding:2px 8px}
.step-h{font-weight:600;margin-top:12px}
.step-d{font-size:13px;color:var(--text-3);margin-top:2px}

/* tool cards */
.tool-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.tool-group{grid-column:1/-1;font-size:13px;font-weight:600;color:var(--text-3);margin-top:16px}
.tool-group:first-child{margin-top:0}
.tool-card{display:flex;gap:16px;align-items:flex-start;padding:20px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text);transition:border-color .15s,box-shadow .15s}
.tool-card:hover{border-color:var(--accent-border);box-shadow:var(--shadow-md);text-decoration:none;color:var(--text)}
.tool-card.is-soon{border-style:dashed;box-shadow:none}
.tool-card.is-soon:hover{border-color:var(--border)}
.ico-box{width:40px;height:40px;border-radius:10px;background:var(--accent-bg);color:var(--accent-text);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.tool-card .t{font-weight:600;font-size:16px}
.tool-card .d{font-size:14px;color:var(--text-3);margin-top:4px}
.tool-card .meta{display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center;margin-top:10px;font-size:12px;color:var(--text-3)}

/* tags */
.tag{display:inline-flex;align-items:center;gap:4px;font-size:12px;font-weight:600;line-height:1.5;padding:1px 8px;border-radius:999px;border:1px solid var(--border);background:var(--surface-2);color:var(--text-2);white-space:nowrap}
.tag-success{background:var(--success-bg);border-color:var(--success-border);color:var(--success)}
.tag-warn{background:var(--warn-bg);border-color:var(--warn-border);color:var(--warn)}
.tag-danger{background:var(--danger-bg);border-color:var(--danger-border);color:var(--danger)}
.tag-accent{background:var(--accent-bg);border-color:var(--accent-border);color:var(--accent-text)}

/* callouts */
.callout{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-radius:12px;border:1px solid var(--border);background:var(--surface-2);font-size:14px;color:var(--text-2)}
.callout svg{margin-top:1px}
.callout p{color:inherit}
.callout a{color:inherit;text-decoration:underline;text-underline-offset:3px}
.callout-info{background:var(--accent-bg);border-color:var(--accent-border);color:var(--text)}
.callout-info svg{color:var(--accent-text)}
.callout-success{background:var(--success-bg);border-color:var(--success-border);color:var(--text)}
.callout-success svg{color:var(--success)}
.callout-warn{background:var(--warn-bg);border-color:var(--warn-border);color:var(--text)}
.callout-warn svg{color:var(--warn)}
.callout-danger{background:var(--danger-bg);border-color:var(--danger-border);color:var(--text)}
.callout-danger svg{color:var(--danger)}

/* tables */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}
table.data{width:100%;border-collapse:collapse;font-size:14px}
table.data th{text-align:left;padding:11px 14px;background:var(--surface-2);font-size:12px;font-weight:600;color:var(--text-2);border-bottom:1px solid var(--border);white-space:nowrap}
table.data td{padding:12px 14px;border-bottom:1px solid var(--border);vertical-align:top;color:var(--text-2)}
table.data tr:last-child td{border-bottom:0}
table.data td:first-child{font-weight:600;color:var(--text);white-space:nowrap}
table.data .r{text-align:right}
table.data td.num,table.data th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap;color:var(--text)}
.t-good{color:var(--success)!important;font-weight:600}
.t-bad{color:var(--danger)!important;font-weight:600}
.t-warn{color:var(--warn)!important}

/* forms */
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px 20px}
.field label,.field .label{display:block;font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:6px}
.input,.select,.field input[type=text],.field input[type=number],.field input[type=date],.field input[type=search],.field select{width:100%;min-height:42px;padding:9px 12px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface);color:var(--text);font:15px/1.3 var(--font)}
/* select and date share one look: same box, same 18px trailing icon in --text-3 */
.select,.field select,.field input[type=date]{-webkit-appearance:none;appearance:none;padding-right:40px;background-repeat:no-repeat;background-position:right 12px center;background-size:18px 18px;cursor:pointer}
.select,.field select{background-image:var(--ico-chevron)}
.field input[type=date]{background-image:var(--ico-calendar);position:relative;text-align:left}
.field input[type=date]::-webkit-calendar-picker-indicator{position:absolute;inset:0;width:auto;height:auto;margin:0;padding:0;opacity:0;cursor:pointer}
.field input[type=date]::-webkit-date-and-time-value{text-align:left;margin:0}
.field input[type=date]::-webkit-datetime-edit{padding:0}
.field input:focus,.field select:focus{outline:none;border-color:var(--focus);box-shadow:0 0 0 3px color-mix(in srgb,var(--focus) 22%,transparent)}
.field .hint{font-size:12px;color:var(--text-3);margin-top:5px}
.check{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);cursor:pointer}
.check input{width:16px;height:16px;accent-color:var(--accent)}

/* chips (filters, sort) */
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;border:1px solid var(--border-strong);background:var(--surface);color:var(--text-2);font:500 14px/1.2 var(--font);cursor:pointer;white-space:nowrap}
.chip:hover{border-color:var(--accent-border);color:var(--text)}
.chip.active,.chip[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}

/* stats & results */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.stat{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:10px 12px}
.stat-label{font-size:12px;color:var(--text-3)}
.stat-value{font-size:15px;font-weight:600;color:var(--text)}
.result-box{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px}
.result-box.primary{background:var(--accent-bg);border-color:var(--accent-border)}
.result-label{font-size:13px;color:var(--text-3);font-weight:500}
.result-num{font-size:38px;font-weight:700;letter-spacing:-.03em;font-variant-numeric:tabular-nums;color:var(--text);line-height:1.2;margin-top:2px}
.result-box.primary .result-num{color:var(--accent-text)}
.rows .row{display:flex;justify-content:space-between;gap:16px;font-size:14px;padding:9px 0;border-top:1px solid var(--border);color:var(--text-2)}
.rows .row span:last-child{font-variant-numeric:tabular-nums;color:var(--text);white-space:nowrap}

/* FAQ (native details/summary) */
.faq{display:grid;gap:8px}
.faq details{border:1px solid var(--border);border-radius:12px;background:var(--surface)}
.faq summary{list-style:none;cursor:pointer;padding:15px 18px;font-weight:600;display:flex;justify-content:space-between;gap:16px;color:var(--text)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";width:9px;height:9px;border-right:2px solid var(--text-3);border-bottom:2px solid var(--text-3);transform:rotate(45deg);margin-top:5px;flex-shrink:0;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(-135deg);margin-top:9px}
.faq .a{padding:0 18px 16px;font-size:15px;color:var(--text-2)}
.faq .a p + p{margin-top:8px}

/* sources & legal */
.sources{list-style:none;font-size:13px;color:var(--text-3);display:grid;gap:6px}
.sources li{padding-left:14px;position:relative;word-break:break-word}
.sources li::before{content:"";position:absolute;left:0;top:.62em;width:5px;height:5px;border-radius:50%;background:var(--border-strong)}
.fine-print{font-size:13px;color:var(--text-3);line-height:1.7}

/* footer */
.site-footer{background:var(--footer-bg);color:var(--footer-text);padding:48px 0 40px;margin-top:56px;font-size:14px}
.site-footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
.site-footer .brand{color:var(--footer-strong)}
.site-footer .brand svg{color:var(--footer-strong)}
.site-footer .brand-dot{fill:#F2A045}
.site-footer .brand em{color:var(--footer-text)}
.site-footer h4{color:var(--footer-strong);font-size:13px;font-weight:600;margin-bottom:10px}
.site-footer ul{list-style:none;display:grid;gap:7px}
.site-footer a{color:var(--footer-text)}
.site-footer a:hover{color:var(--footer-strong)}
.site-footer p{color:var(--footer-text)}
.site-footer .legal{border-top:1px solid var(--footer-border);margin-top:32px;padding-top:20px;font-size:12px;line-height:1.7}

/* toast */
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:var(--text);color:var(--bg);padding:10px 16px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:60;max-width:calc(100% - 32px)}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- responsive ---------- */
@media (max-width:860px){
  .home-hero .container{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .tool-grid{grid-template-columns:1fr}
  .site-footer .cols{grid-template-columns:1fr 1fr}
  .site-footer .cols > :first-child{grid-column:1/-1}
}
@media (max-width:640px){
  .container{padding:0 16px}
  .site-header .container{gap:12px}
  .site-nav{display:none}
  .home-hero{padding:44px 0 36px}
  .page-hero{padding:32px 0 26px}
  .home-hero h1{font-size:32px}
  .page-hero h1{font-size:27px}
  .lead{font-size:16px}
  h2{font-size:22px}
  .section{padding:36px 0}
  .form-grid{grid-template-columns:1fr}
  .card-pad{padding:16px}
  .result-num{font-size:32px}
  .btn{padding:11px 16px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}