/*
Theme Name: JLOPT Tech Notes
Version: 1.0.0
Description: Lightweight technology journal for JLOPT.
*/
:root{--bg:#090f19;--panel:#101925;--line:#243140;--text:#e8eef5;--muted:#8d9bad;--cyan:#57e1d2}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.8}a{color:inherit;text-decoration:none;transition:color .18s,border-color .18s,background .18s}a:hover{color:var(--cyan)}a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--cyan);outline-offset:5px}.wrap{width:min(1180px,calc(100% - 64px));margin:auto}header{border-bottom:1px solid var(--line);background:#0b111c}.nav{display:flex;justify-content:space-between;align-items:center;height:100px}.brand{display:flex;gap:14px;align-items:center;font-size:20px;font-weight:750;letter-spacing:2px}.mark{border:1px solid #3e696e;background:#122b30;border-radius:10px;padding:7px 10px;letter-spacing:-1px;color:var(--cyan)}.mark 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scaleY(.6);width:310px;height:310px;border-color:#5c88dd66}.orbit-one:after{content:"";position:absolute;top:38px;left:25px;width:8px;height:8px;background:var(--cyan);border-radius:50%;box-shadow:0 0 20px var(--cyan)}.core{width:170px;height:170px;border-radius:50%;background:radial-gradient(circle at 35% 25%,#1f5864,#101c2c 70%);border:1px solid #50a9b366;box-shadow:0 0 70px #48d4cf17,inset 0 0 40px #4ecdd115;display:flex;flex-direction:column;justify-content:center;align-items:center;font-size:61px;letter-spacing:-5px;font-weight:300;color:#a7ecec}.core span{font-family:Consolas,monospace;font-size:7px;letter-spacing:2px}.float{position:absolute;font-family:Consolas,monospace;font-size:10px;letter-spacing:1px;color:#89abb9;padding:8px 13px;border:1px solid #2b4658;border-radius:4px;background:#0b1420}.top{top:25px;left:15px}.bottom{bottom:27px;right:5px}.cross{position:absolute;right:35px;top:65px;color:var(--cyan)}.topics{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#101925}.topics a{padding:25px 28px}.topics a+a{border-left:1px solid var(--line)}.topics a:hover{background:#15232f}.topics span{color:var(--cyan);font-size:10px;letter-spacing:2px;font-family:Consolas,monospace}.topics h2{font-size:18px;margin:10px 0 5px;font-weight:600}.topics p{font-size:12px;color:var(--muted);margin:0}.listing{padding:65px 0}.section-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:26px}.section-head h2{font-size:27px;margin:7px 0 0;letter-spacing:-.6px}.muted{font-size:11px;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{display:flex;flex-direction:column;padding:25px;background:linear-gradient(140deg,#121d2a,#0d1520);border:1px solid var(--line);border-radius:7px;min-height:270px}.card:hover{border-color:#47666e}.meta{color:#8b9aaf;font-size:10px;font-family:Consolas,"Microsoft YaHei",monospace}.meta span{color:#436269;margin:0 6px}.card h3{font-size:18px;line-height:1.65;margin:16px 0 13px;font-weight:600}.card p{font-size:12px;line-height:1.9;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.read{font-size:12px;margin-top:auto;padding-top:20px;color:var(--cyan);display:flex;justify-content:space-between}.pagination{margin-top:30px}.nav-links{display:flex;gap:10px;flex-wrap:wrap}.page-numbers{padding:6px 14px;background:var(--panel);border:1px solid var(--line);border-radius:4px}.page-numbers.current{color:var(--cyan);border-color:var(--cyan)}footer{border-top:1px solid var(--line);padding:35px 0 40px;display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:11px}.footer-logo{font-size:16px;letter-spacing:2px;color:var(--text);font-weight:700}.footer-logo span{font-size:9px;color:var(--muted);font-weight:400}footer p{margin:10px 0 0}.footer-links{display:flex;flex-direction:column;align-items:end;gap:10px}.footer-links a{color:var(--cyan)}.article{max-width:850px;margin:auto;padding:65px 0 80px}.article h1{font-size:clamp(28px,4vw,42px);line-height:1.5;margin:17px 0 22px}.article-meta{color:var(--muted);font-size:12px;border-bottom:1px solid var(--line);padding-bottom:25px}.content{color:#b9c7d6;font-size:16px;overflow-wrap:anywhere;line-height:2}.content h2,.content h3{color:var(--text);margin-top:35px}.content a{color:var(--cyan);text-decoration:underline}.content img{max-width:100%;height:auto;border-radius:5px;margin:15px 0}.content iframe{max-width:100%}.content pre{background:#111e2b;padding:22px;overflow:auto;border:1px solid var(--line);border-radius:5px;font-size:13px;line-height:1.8}.content code{color:#8ce2d6}.content blockquote{border-left:3px solid var(--cyan);margin-left:0;padding:12px 22px;background:var(--panel)}.content table{display:block;overflow:auto;max-width:100%}.content td,.content th{border:1px solid var(--line);padding:10px}.post-nav{border-top:1px solid var(--line);margin-top:45px;padding-top:25px;display:flex;justify-content:space-between;gap:25px;font-size:13px;color:var(--cyan)}.archive-list{margin-top:30px}.archive-list a{display:flex;gap:25px;border-bottom:1px solid var(--line);padding:18px 0}.archive-list time{font-size:12px;color:var(--muted);white-space:nowrap}.archive-list b{margin-left:auto;color:var(--cyan)}.search-form{display:flex;gap:10px;margin-bottom:30px;max-width:700px}.search-form input{min-width:0;flex:1;border:1px solid var(--line);padding:14px;background:var(--panel);color:var(--text);border-radius:4px;font:inherit}.search-form button{background:var(--cyan);color:#071b1c;border:0;border-radius:4px;padding:0 22px;cursor:pointer;font:inherit}.empty{grid-column:1/-1;padding:40px;background:var(--panel);border:1px solid var(--line);border-radius:7px}.empty p{color:var(--muted)}.screen-reader-text,.skip{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(1px,1px,1px,1px)}.skip:focus{clip:auto;width:auto;height:auto;background:var(--panel);padding:10px;z-index:99}@media(max-width:900px){.hero{grid-template-columns:1.2fr 1fr;gap:5px}.hero h1{font-size:39px}.grid{grid-template-columns:repeat(2,1fr)}.topics a{padding:22px 18px}.visual{transform:scale(.85)}nav{gap:20px}}@media(max-width:650px){.wrap{width:calc(100% - 36px)}.nav{height:auto;padding:20px 0;align-items:start;gap:20px;flex-direction:column}.brand{font-size:17px}.mark{padding:3px 8px}nav{width:100%;justify-content:space-between;font-size:12px;gap:12px}nav .nav-search{padding-left:14px}.hero{display:flex;flex-direction:column;padding:45px 0 30px;align-items:stretch;gap:10px}.hero h1{font-size:36px}.hero p{font-size:13px}.hero-tags{gap:16px}.visual{height:280px;transform:none}.orb{width:230px;height:230px}.orbit-two{width:265px;height:265px}.core{width:145px;height:145px;font-size:50px}.top{top:12px}.bottom{bottom:12px}.topics{grid-template-columns:1fr}.topics a+a{border-left:0;border-top:1px solid var(--line)}.topics a{padding:20px 24px}.topics h2{font-size:17px}.grid{grid-template-columns:1fr}.listing{padding:40px 0}.section-head .muted{display:none}.card{min-height:235px}.article{padding:40px 0 55px}.content{font-size:15px}.archive-list a{gap:13px;font-size:14px}.archive-list time{font-size:10px}footer{flex-direction:column}.footer-links{align-items:start}.post-nav{flex-direction:column}.search-form button{padding:0 15px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}a{transition:none}}
/* Light palette */
:root{color-scheme:light;--bg:#f6f9fc;--panel:#ffffff;--line:#dce5ee;--text:#182b40;--muted:#5d7085;--cyan:#087d83}
header{background:#ffffffed}.mark{background:#e7f5f4;border-color:#b7dcdb;color:#087d83}.mark span{color:#6b9296}.hero-tags{color:#60778b}.visual{background:radial-gradient(ellipse,#90d8df45,transparent 68%)}.visual:before{background-image:linear-gradient(#28788d12 1px,transparent 1px),linear-gradient(90deg,#28788d12 1px,transparent 1px)}.orb{border-color:#269b9e70}.orbit-two{border-color:#5484c37a}.core{background:radial-gradient(circle at 35% 25%,#ffffff,#d6edf2 70%);border-color:#7abdc6;box-shadow:0 12px 70px #2f9aa520,inset 0 0 35px #ffffffa0;color:#167386}.float{color:#376477;background:#fffffff2;border-color:#c6dde7;box-shadow:0 5px 20px #345d7610}.topics{background:#ffffff}.topics a:hover{background:#eef7f8}.card{background:linear-gradient(140deg,#ffffff,#f1f7fb);box-shadow:0 5px 20px #304e6b05}.card:hover{border-color:#8ebac5}.meta{color:#61778d}.meta span{color:#6e99a3}.content{color:#354d64}.content pre{background:#edf4f8}.content code{color:#076b75}.button,.search-form button{background:#087d83;color:#ffffff;border-color:#087d83}.button:hover{background:#06676d;color:#ffffff}.eyebrow i,.float i{background:#0b9993;box-shadow:0 0 12px #0b999333}.orbit-one:after{background:#0b9993;box-shadow:0 0 20px #0b999366}
/* Chinese reading typography */
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Segoe UI",sans-serif;font-size:17px;line-height:1.85;color:#202f3f;-webkit-font-smoothing:antialiased}nav{font-size:17px;gap:32px}.brand{font-size:23px}.brand-sub{font-size:11px}.hero{padding:62px 0 48px;min-height:510px}.hero h1{font-size:clamp(40px,4.5vw,58px);letter-spacing:-1px;line-height:1.4}.hero p{font-size:19px;line-height:1.95;color:#526579}.eyebrow{font-size:13px;letter-spacing:1.5px}.button{font-size:17px;padding:13px 25px}.text-link{font-size:16px}.hero-tags{font-size:12px}.topics span{font-size:12px}.topics h2{font-size:22px;margin:10px 0 8px}.topics p{font-size:16px;line-height:1.85}.topics a{padding:27px}.section-head h2{font-size:32px}.muted{font-size:14px}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.card{padding:30px 32px;min-height:310px;border-radius:10px;background:#fff}.meta{font-family:inherit;font-size:14px;color:#63768a}.card h3{font-size:24px;line-height:1.6;letter-spacing:0;font-weight:650;margin:16px 0}.card p{font-size:17px;line-height:1.9;color:#526579;-webkit-line-clamp:3;margin-bottom:16px}.read{font-size:16px;padding-top:16px}.article{max-width:800px}.article h1{font-size:clamp(32px,4vw,44px);line-height:1.5}.article-meta{font-size:15px}.content{font-size:19px;line-height:1.95;color:#2f4255;letter-spacing:.2px}.content p{margin-bottom:1.5em}.content h2{font-size:28px;line-height:1.6;margin-top:1.7em;margin-bottom:.7em}.content h3{font-size:23px;line-height:1.6}.content li{margin-bottom:.5em}.content pre{font-size:15px;line-height:1.85;letter-spacing:0}.content code{font-family:Consolas,monospace}.archive-list a{font-size:18px;line-height:1.8;padding:21px 0}.archive-list time{font-size:14px}.post-nav{font-size:16px}.footer-logo{font-size:20px}.footer-logo span{font-size:12px}footer{font-size:14px}.search-form{font-size:17px}.page-numbers{font-size:16px}
@media(max-width:1000px){.topics{grid-template-columns:1fr}.topics a{padding:24px 28px}.topics a+a{border-left:0;border-top:1px solid var(--line)}.hero h1{font-size:42px}.hero p{font-size:18px}.card{padding:25px}.card h3{font-size:22px}}
@media(max-width:650px){body{font-size:17px}.wrap{width:calc(100% - 36px)}nav{font-size:16px;gap:12px}.brand{font-size:22px}.nav{gap:23px}.hero{padding:36px 0 25px;min-height:0}.hero h1{font-size:38px;line-height:1.45}.hero p{font-size:17px;line-height:1.9}.hero p br{display:none}.hero-tags{font-size:11px;gap:15px}.eyebrow{font-size:12px;letter-spacing:1px}.button{font-size:16px;padding:12px 20px}.text-link{font-size:16px}.actions{gap:20px}.visual{height:240px}.topics h2{font-size:22px}.topics p{font-size:16px}.grid{grid-template-columns:1fr;gap:18px}.card{padding:25px;min-height:0}.card h3{font-size:23px;line-height:1.65}.card p{font-size:17px;line-height:1.9}.meta{font-size:14px}.read{font-size:16px}.section-head h2{font-size:29px}.article h1{font-size:30px}.content{font-size:18px;line-height:2}.content h2{font-size:25px}.content h3{font-size:22px}.content pre{font-size:14px;padding:17px}.archive-list a{flex-wrap:wrap;gap:3px 12px;font-size:18px}.archive-list time{flex-basis:100%;font-size:14px}.archive-list span{flex:1}.article-meta{font-size:14px}footer{font-size:14px}.search-form{font-size:16px}}
/* Illustrated article cards */
.card{overflow:hidden}.card-cover{display:block;position:relative;margin:-30px -32px 24px;aspect-ratio:16/9;overflow:hidden;background:#e8f0f7;border-bottom:1px solid var(--line)}.card-cover img{width:100%;height:100%;display:block;object-fit:cover;object-position:center;transition:transform .3s}.card:hover .card-cover img{transform:scale(1.025)}.cover-label{position:absolute;bottom:16px;left:20px;background:#fffffff2;color:#25495c;padding:4px 12px;border:1px solid #d5e6eb;border-radius:5px;font-size:13px;font-weight:600;box-shadow:0 2px 8px #1233450a}.card h3{margin-top:12px}@media(max-width:1000px){.card-cover{margin:-25px -25px 22px}}@media(max-width:650px){.card-cover{margin:-25px -25px 22px}.cover-label{font-size:13px}}@media(prefers-reduced-motion:reduce){.card-cover img{transition:none}}
/* Compact three-column article grid */
.grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.card{padding:22px;min-height:0}.card-cover{margin:-22px -22px 18px}.card h3{font-size:21px;line-height:1.6;margin:12px 0}.card p{font-size:16px;line-height:1.85;-webkit-line-clamp:2}.meta{font-size:13px}.read{font-size:15px;padding-top:12px}.cover-label{font-size:12px;bottom:12px;left:14px;padding:3px 10px}@media(max-width:760px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.grid{grid-template-columns:1fr;gap:18px}.card h3{font-size:22px}.card p{font-size:17px}.meta{font-size:14px}.read{font-size:16px}}

/* Self-hosted official Source Han Sans variable font */
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