@font-face { font-family:'AestrLogo'; src:url('../../fonts/logo-sans.ttf') format('truetype'); font-weight:200 400; font-display:swap; }
@font-face { font-family:'AestrSerif'; src:url('../../fonts/serif-cn.ttf') format('truetype'); font-weight:200 700; font-display:swap; }

:root{
  --lab-serif:'AestrSerif','Noto Serif SC','Songti SC',serif;
  --lab-sans:var(--font-body,'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif);
  --lab-mono:var(--font-number,'Special Elite','Space Mono','Courier New',monospace);
  --lab-gutter:clamp(24px,7vw,120px);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--c-paper,#E0D6CA)}
body{min-height:100svh;background:var(--c-paper,#E0D6CA);color:var(--c-ink,#233245);font-family:var(--lab-sans);font-size:15px;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;border:0}
img{display:block;max-width:100%}
button,input,select{font:inherit}

/* -------- nav (same chrome as zh/tools.html) -------- */
.nav{position:sticky;top:0;z-index:20;height:62px;display:flex;align-items:center;justify-content:space-between;padding:0 var(--lab-gutter);background:rgba(224,214,202,.9);backdrop-filter:blur(14px) saturate(1.05);-webkit-backdrop-filter:blur(14px) saturate(1.05);border-bottom:1px solid var(--c-hairline,rgba(35,50,69,.2))}
.nav-brand{display:flex;align-items:center}
.nav-logo{width:116px;height:46px;background-color:var(--c-slate,#233245);-webkit-mask:url('../../assets/aestrat-wordmark-on-light.png') left center/contain no-repeat;mask:url('../../assets/aestrat-wordmark-on-light.png') left center/contain no-repeat}
.nav-links{display:flex;align-items:center;gap:clamp(18px,2.4vw,34px)}
.nav-links a{font-family:var(--lab-mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--c-ink-3,#5A6678);transition:color var(--t-fast,160ms) var(--ease-quiet,ease)}
.nav-links a.here,.nav-links a:hover{color:var(--c-oxblood,#520E0D)}

/* -------- mast -------- */
.page{padding:clamp(70px,8vw,118px) var(--lab-gutter) clamp(64px,8vw,112px)}
.mast{max-width:1180px;margin:0 auto clamp(48px,6vw,76px);border-bottom:1px solid var(--c-sand-2,#CEB59C);padding-bottom:clamp(28px,4vw,48px);display:grid;grid-template-columns:minmax(0,1.05fr) minmax(320px,1fr);gap:clamp(24px,4vw,56px);align-items:center}
.eyebrow{font-family:var(--lab-mono);font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--c-oxblood,#520E0D);margin-bottom:18px}
.mast h1{font-family:var(--lab-serif);font-weight:200;font-size:clamp(42px,6vw,82px);line-height:1.05;letter-spacing:.02em;color:var(--c-slate,#233245)}
.mast-sub{font-family:var(--lab-serif);font-weight:300;font-size:clamp(17px,2vw,23px);line-height:1.4;letter-spacing:.14em;color:var(--c-slate-2,#303F54);margin-top:14px}
.mast-lead{max-width:34rem;margin-top:16px;color:var(--c-ink-3,#5A6678);font-size:14.5px;line-height:1.9}
.mast-art{align-self:center;justify-self:end;margin:0;width:100%}
.mast-art img{width:100%;height:auto;mix-blend-mode:multiply;
  -webkit-mask-image:linear-gradient(to right,transparent,#000 9%,#000 91%,transparent),linear-gradient(to bottom,transparent,#000 9%,#000 91%,transparent);
  -webkit-mask-composite:source-in;
  mask-image:linear-gradient(to right,transparent,#000 9%,#000 91%,transparent),linear-gradient(to bottom,transparent,#000 9%,#000 91%,transparent);
  mask-composite:intersect}
.mast-meta{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:clamp(14px,2.2vw,30px);margin-top:10px;padding-top:22px;border-top:1px solid var(--c-hairline,rgba(35,50,69,.2));font-family:var(--lab-mono);font-size:10.5px;letter-spacing:.18em;color:var(--c-ink-4,#77839B);text-transform:uppercase}

/* -------- tool grid: light specimen cards on a faint dot field -------- */
.lab-grid{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;padding:6px;background-image:radial-gradient(rgba(35,50,69,.08) 1.4px,transparent 1.4px);background-size:32px 32px}
.lab-card{display:flex;flex-direction:column;background:var(--c-paper-light,#EBE3D8);border:1px solid var(--c-hairline,rgba(35,50,69,.2));border-radius:0;padding:22px 22px 20px;transition:transform var(--t-med,320ms) var(--ease-quiet,ease),border-color var(--t-fast,160ms) var(--ease-quiet,ease)}
.lab-card:hover{transform:translateY(-4px);border-color:var(--c-sand-1,#BCA078)}
.card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:16px}
.card-icon{display:flex;align-items:center;justify-content:center;width:60px;height:60px}
.card-icon img{width:56px;height:56px;object-fit:cover;border-radius:8px}
.card-no{font-family:var(--lab-mono);font-size:13px;letter-spacing:.1em;color:var(--c-sand-1,#BCA078);font-variant-numeric:tabular-nums}
.card-kicker{font-family:var(--lab-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--c-ink-4,#77839B);margin-bottom:7px}
.lab-card h2{font-family:var(--lab-serif);font-weight:300;font-size:clamp(21px,1.9vw,26px);line-height:1.2;color:var(--c-slate,#233245);letter-spacing:.08em}
.lab-card p{color:var(--c-ink-3,#5A6678);font-size:13.5px;line-height:1.8;margin-top:10px}
.chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}
.chip{display:inline-flex;align-items:center;gap:6px;min-height:24px;padding:3px 9px;border:1px solid var(--c-hairline,rgba(35,50,69,.2));border-radius:2px;background:transparent;font-family:var(--lab-mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--c-ink-3,#5A6678)}
.chip.mark{background:var(--c-sand-3,#DCC8B2);border-color:var(--c-sand-2,#CEB59C);color:var(--c-ink-2,#39465C)}
.chip.has-download{padding-right:4px}
.chip-download{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-left:1px solid var(--c-hairline,rgba(35,50,69,.2));padding-left:5px;color:var(--c-oxblood,#520E0D);font-size:12px;line-height:1;transition:opacity var(--t-fast,160ms) var(--ease-quiet,ease)}
.chip-download:hover{opacity:.6}

/* -------- actions -------- */
.card-foot{display:flex;align-items:center;justify-content:flex-end;gap:8px;margin-top:auto;padding-top:18px}
.detail-btn,.modal-link{display:inline-flex;align-items:center;justify-content:center;padding:12px 16px;border:1px solid var(--c-ink,#233245);border-radius:0;background:transparent;color:var(--c-ink,#233245);font-family:var(--lab-mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;cursor:pointer;white-space:nowrap;transition:background var(--t-fast,160ms) var(--ease-quiet,ease),color var(--t-fast,160ms) var(--ease-quiet,ease),opacity var(--t-fast,160ms) var(--ease-quiet,ease)}
.card-foot .detail-btn{padding:8px 13px;font-size:10px}
.detail-btn:hover,.modal-link:hover{opacity:.7}
.detail-btn.primary{border-color:var(--c-oxblood,#520E0D);color:var(--c-oxblood,#520E0D)}
.detail-btn.primary:hover{background:var(--c-oxblood,#520E0D);color:var(--c-bone,#E0D6CA);opacity:1}

/* -------- footer -------- */
.footer{background:var(--c-slate-1,#1A2738);color:var(--c-paper-light,#EBE3D8);padding:28px var(--lab-gutter)}
.footer-inner{max-width:1180px;margin:0 auto;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-family:var(--lab-mono);font-size:10px;letter-spacing:.1em;color:var(--c-slate-4,#6F7C92)}

/* -------- status stamp on cards without actions -------- */
.soon{font-family:var(--lab-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--c-ink-4,#77839B);padding:9px 0}

/* -------- download chooser dialog -------- */
.modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:18px;background:rgba(21,18,14,.32)}
.modal.is-open{display:flex}
.modal-panel{width:min(520px,100%);max-height:min(86svh,700px);overflow:auto;border:1px solid var(--c-ink,#233245);border-radius:0;background:var(--c-paper,#E0D6CA);box-shadow:var(--shadow-2,0 12px 32px -16px rgba(35,50,69,.22))}
.modal-head{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 22px;border-bottom:1px solid var(--c-hairline,rgba(35,50,69,.2))}
.modal-title{font-family:var(--lab-mono);font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--c-ink-4,#77839B)}
.modal-close{width:34px;height:34px;border:1px solid var(--c-ink,#233245);border-radius:0;background:transparent;cursor:pointer;color:var(--c-ink,#233245);font-size:20px;line-height:1;transition:opacity var(--t-fast,160ms) var(--ease-quiet,ease)}
.modal-close:hover{opacity:.7}
.modal-content{padding:24px 26px 26px}
.dl-kicker{font-family:var(--lab-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--c-ink-4,#77839B);margin-bottom:8px}
.dl-name{font-family:var(--lab-serif);font-weight:300;font-size:clamp(24px,3vw,32px);line-height:1.15;color:var(--c-slate,#233245);letter-spacing:.06em}
.dl-note{margin-top:10px;color:var(--c-ink-3,#5A6678);font-size:13px;line-height:1.75}
.dl-options{margin-top:18px;border-top:1px solid var(--c-hairline,rgba(35,50,69,.2))}
.dl-option{display:flex;align-items:center;gap:12px;padding:14px 2px;border-bottom:1px solid var(--c-hairline,rgba(35,50,69,.2));cursor:pointer;transition:opacity var(--t-fast,160ms) var(--ease-quiet,ease)}
.dl-option:hover{opacity:.75}
.dl-option input{width:15px;height:15px;margin:0;accent-color:var(--c-oxblood,#520E0D);cursor:pointer}
.dl-label{color:var(--c-ink,#233245);font-size:14px}
.dl-meta{margin-left:auto;font-family:var(--lab-mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--c-ink-4,#77839B)}
.dl-actions{display:flex;align-items:center;gap:14px;margin-top:22px}
.dl-actions .detail-btn[disabled]{cursor:not-allowed;border-color:var(--c-hairline,rgba(35,50,69,.2));color:var(--c-ink-4,#77839B);background:transparent}
.dl-more{margin-left:auto;font-family:var(--lab-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--c-oxblood,#520E0D);transition:opacity var(--t-fast,160ms) var(--ease-quiet,ease)}
.dl-more:hover{opacity:.7}
.preview-frame{margin-top:18px;border:1px solid var(--c-hairline,rgba(35,50,69,.2));background:var(--c-paper-light,#EBE3D8);overflow:hidden}
.preview-frame img{width:100%;max-height:min(62svh,560px);object-fit:contain;background:var(--c-paper-light,#EBE3D8)}

/* -------- responsive -------- */
@media(max-width:820px){
  .nav{padding:0 20px}
  .nav-logo{width:102px}
  .nav-links{gap:16px}
  .nav-links .hide-sm{display:none}
  .mast{grid-template-columns:1fr;gap:26px}
  .mast-art{justify-self:center}
  .lab-grid{grid-template-columns:1fr}
}
@media(min-width:821px) and (max-width:1080px){
  .lab-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}