/* ============================================================
   SITE DESIGN SYSTEM — shared by index / portfolio / blog / resume
   Self-contained: tokens + base + layouts + components.
   No legacy stylesheets required. Dark default + light.
   ============================================================ */

/* ---------- Tokens ---------- */
:root, [data-theme="dark"]{
  color-scheme:dark;
  --bg:hsl(220,7%,8%); --surface:hsl(220,6%,11%); --surface-2:hsl(220,6%,14%);
  --border:hsl(220,6%,18%); --border-strong:hsl(220,6%,26%);
  --text:hsl(0,0%,96%); --text2:hsl(220,8%,74%); --muted:hsl(220,6%,55%);
  --accent:hsl(158,26%,58%); --accent-strong:hsl(160,30%,50%); --on-accent:hsl(220,12%,8%);
}
[data-theme="light"]{
  color-scheme:light;
  --bg:hsl(220,16%,99%); --surface:hsl(0,0%,100%); --surface-2:hsl(220,14%,96%);
  --border:hsl(220,13%,88%); --border-strong:hsl(220,10%,80%);
  --text:hsl(220,16%,13%); --text2:hsl(220,10%,32%); --muted:hsl(220,8%,46%);
  --accent:hsl(162,38%,32%); --accent-strong:hsl(163,42%,26%); --on-accent:hsl(0,0%,100%);
}
:root{ --mono:'JetBrains Mono',ui-monospace,monospace; --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; }

/* ---------- Base ---------- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased;
  transition:background-color .3s ease,color .3s ease}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--accent);color:var(--on-accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:3px}

.mono{font-family:var(--mono)}
.muted{color:var(--muted);font-size:14px}
.accent{color:var(--accent)}

/* mono section label */
.label{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);
  margin-bottom:24px;display:flex;align-items:center;gap:12px}
.label .line{flex:1;height:1px;background:var(--border)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--sans);
  font-size:14px;font-weight:500;padding:9px 16px;border-radius:9px;cursor:pointer;
  border:1px solid var(--border-strong);color:var(--text);background:transparent;
  transition:color .2s,background-color .2s,border-color .2s,transform .2s}
.btn ion-icon,.btn svg{font-size:16px;width:16px;height:16px}
.btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.btn.solid{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.btn.solid:hover{background:var(--accent-strong);border-color:var(--accent-strong);color:var(--on-accent)}

/* ---------- Theme toggle ---------- */
.theme-toggle{display:inline-flex;align-items:center;gap:10px;width:max-content;font-family:var(--mono);
  font-size:12px;color:var(--muted);background:none;border:none;cursor:pointer;transition:color .2s}
.theme-toggle:hover{color:var(--accent)}
.theme-toggle ion-icon{font-size:17px}
.theme-toggle .icon-to-dark{display:none}
[data-theme="light"] .theme-toggle .icon-to-light{display:none}
[data-theme="light"] .theme-toggle .icon-to-dark{display:inline-flex}

/* ============================================================
   LANDING LAYOUT (index)
   ============================================================ */
.wrap{max-width:1200px;margin:0 auto;padding:0 40px;display:grid;grid-template-columns:34% 1fr;gap:84px}
@media(max-width:880px){.wrap{grid-template-columns:1fr;gap:0;padding:0 24px}}

.intro{position:sticky;top:0;align-self:start;min-height:100vh;display:flex;flex-direction:column;justify-content:flex-start;padding:104px 0 60px}
@media(max-width:880px){.intro{position:static;min-height:0;padding:72px 0 32px}}
.intro .avatar{flex:none;align-self:flex-start;width:76px;height:76px;border-radius:50%;object-fit:cover;border:1px solid var(--border-strong);margin-bottom:30px}
.intro h1{font-size:50px;font-weight:800;letter-spacing:-0.03em;line-height:1.03}
.intro .role{margin-top:12px;font-size:20px;font-weight:600;color:var(--accent)}
.intro .pitch{margin-top:20px;color:var(--text2);max-width:36ch;font-size:15.5px}
.intro .loc{margin-top:16px;font-family:var(--mono);font-size:12px;color:var(--muted)}
.intro .resume-actions{margin-top:24px;display:flex;gap:10px;flex-wrap:wrap}
.intro .btn{padding:8px 14px;font-size:13px}

nav.side{margin-top:36px;display:flex;flex-direction:column;gap:14px}
@media(max-width:880px){nav.side{display:none}}
nav.side a{font-family:var(--mono);font-size:13px;color:var(--muted);display:flex;align-items:center;gap:12px;width:max-content;transition:color .2s}
nav.side a .bar{width:24px;height:1px;background:var(--border-strong);transition:all .2s}
nav.side a:hover,nav.side a.active{color:var(--text)}
nav.side a:hover .bar,nav.side a.active .bar{width:40px;background:var(--accent)}

.socials{margin-top:auto;padding-top:40px;display:flex;gap:18px;flex-wrap:wrap}
.socials a{font-family:var(--mono);font-size:12px;color:var(--muted);border-bottom:1px solid transparent;transition:.2s;padding-bottom:2px}
.socials a:hover{color:var(--accent);border-color:var(--accent)}
.intro .theme-toggle{margin-top:26px}

.content{padding:104px 0 96px;min-width:0}
@media(max-width:880px){.content{padding:0 0 60px}}
.content section{margin-bottom:96px;scroll-margin-top:40px}
.section-more{margin-top:26px}
.section-more a{font-family:var(--mono);font-size:13px;color:var(--accent);border-bottom:1px solid transparent;transition:.2s;padding-bottom:2px}
.section-more a:hover{border-color:var(--accent)}

.prose p{color:var(--text2);font-size:17px;line-height:1.72;margin-bottom:16px;max-width:62ch}
.prose strong{color:var(--text);font-weight:600}

.metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:12px;overflow:hidden;margin-top:32px}
.metric{background:var(--bg);padding:26px 24px}
.metric .n{font-family:var(--mono);font-size:23px;font-weight:500;color:var(--text);letter-spacing:-0.02em}
.metric .l{margin-top:6px;font-size:13px;color:var(--muted)}

/* featured work cards (with image) */
.feature{display:grid;grid-template-columns:180px 1fr;gap:22px;border:1px solid var(--border);border-radius:14px;
  overflow:hidden;margin-bottom:16px;transition:border-color .25s,transform .25s}
.feature:hover{border-color:var(--border-strong);transform:translateY(-3px)}
@media(max-width:560px){.feature{grid-template-columns:1fr}}
.feature .thumb{background:var(--surface-2);overflow:hidden}
.feature .thumb img{width:100%;height:100%;object-fit:cover;min-height:140px;transition:transform .4s ease}
.feature:hover .thumb img{transform:scale(1.04)}
.feature .body{padding:20px 20px 20px 0}
@media(max-width:560px){.feature .body{padding:0 20px 20px}}
.feature .top{display:flex;justify-content:space-between;align-items:baseline;gap:14px}
.feature h3{font-size:18px;font-weight:700;letter-spacing:-0.01em}
.feature h3 .arrow{color:var(--muted);font-weight:400;transition:.2s}
.feature:hover h3 .arrow{color:var(--accent)}
.feature .cat{font-family:var(--mono);font-size:11px;color:var(--muted);white-space:nowrap}
.feature .result{margin-top:4px;font-family:var(--mono);font-size:12px;color:var(--accent)}
.feature p{margin-top:12px;color:var(--text2);font-size:14.5px}
.feature .tech{margin-top:14px;font-family:var(--mono);font-size:11.5px;color:var(--muted)}

/* experience timeline */
.exp{display:flex;gap:20px;padding:18px 0}
.exp + .exp{border-top:1px solid var(--border)}
.exp .when{font-family:var(--mono);font-size:12px;color:var(--muted);white-space:nowrap;padding-top:3px;min-width:120px}
.exp .role2{font-size:16px;font-weight:600}
.exp .co{color:var(--muted);font-size:14px;margin-top:2px}

/* writing list */
.post{display:flex;justify-content:space-between;gap:16px;align-items:baseline;padding:16px 0;transition:.2s}
.post + .post{border-top:1px solid var(--border)}
.post:hover .pt{color:var(--accent)}
.post .pt{font-size:16px;font-weight:600;transition:.2s}
.post .pd{font-family:var(--mono);font-size:12px;color:var(--muted);white-space:nowrap}

.foot{font-family:var(--mono);font-size:12px;color:var(--muted);border-top:1px solid var(--border);padding-top:24px;line-height:1.9;margin-top:8px}
.foot a{color:var(--accent)}

/* ---------- Contact form ---------- */
.contact-form{display:flex;flex-direction:column;gap:14px;max-width:520px;margin-top:8px}
.contact-form .row{display:flex;gap:14px}
@media(max-width:560px){.contact-form .row{flex-direction:column}}
.field{display:flex;flex-direction:column;gap:6px;flex:1}
.field label{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.field input,.field select,.field textarea{background:var(--surface);border:1px solid var(--border);border-radius:9px;
  padding:11px 13px;color:var(--text);font-family:var(--sans);font-size:14px;transition:border-color .2s}
.field textarea{min-height:120px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent)}
.field input::placeholder,.field textarea::placeholder{color:var(--muted)}

/* ============================================================
   DETAIL PAGES (portfolio / blog / resume)
   ============================================================ */
.topbar{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.topbar .inner{max-width:960px;margin:0 auto;padding:16px 40px;display:flex;align-items:center;justify-content:space-between;gap:16px}
@media(max-width:640px){.topbar .inner{padding:14px 24px}}
.topbar .back{font-family:var(--mono);font-size:13px;color:var(--muted);display:inline-flex;align-items:center;gap:8px;transition:color .2s}
.topbar .back:hover{color:var(--accent)}
.topbar .right{display:flex;align-items:center;gap:18px}

.page{max-width:960px;margin:0 auto;padding:64px 40px 96px}
@media(max-width:640px){.page{padding:48px 24px 72px}}
.page-head{margin-bottom:44px}
.page-head h1{font-size:38px;font-weight:800;letter-spacing:-0.03em}
.page-head p{margin-top:12px;color:var(--text2);font-size:16px;max-width:60ch}

/* filters */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}
.filters button{font-family:var(--mono);font-size:12px;color:var(--muted);background:transparent;
  border:1px solid var(--border);border-radius:20px;padding:6px 14px;cursor:pointer;transition:.2s}
.filters button:hover{color:var(--text);border-color:var(--border-strong)}
.filters button.active{color:var(--on-accent);background:var(--accent);border-color:var(--accent)}

/* project grid (portfolio-filter.js output: .project-item > .project-card) */
.project-list{list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:20px;padding:0}
@media(max-width:640px){.project-list{grid-template-columns:1fr}}
.project-card{display:flex;flex-direction:column;height:100%;border:1px solid var(--border);border-radius:14px;
  background:var(--surface);overflow:hidden;transition:border-color .25s,transform .25s,box-shadow .25s}
.project-card:hover{border-color:var(--border-strong);transform:translateY(-4px)}
.project-card__media{position:relative;margin:0;aspect-ratio:16/10;overflow:hidden;background:var(--surface-2)}
.project-card__img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.project-card:hover .project-card__img{transform:scale(1.03)}
.project-card__badge{position:absolute;top:10px;left:10px;z-index:2;padding:4px 9px;font-family:var(--mono);font-size:10px;
  color:var(--text);background:color-mix(in srgb,var(--bg) 72%,transparent);border:1px solid var(--border);border-radius:6px;backdrop-filter:blur(6px)}
.project-card__thumbs{display:flex;gap:8px;padding:12px 16px 0}
.project-card__thumb{width:44px;height:32px;object-fit:cover;border-radius:6px;border:1px solid var(--border);opacity:.6;cursor:pointer;transition:.2s}
.project-card__thumb:hover{opacity:.9}
.project-card__thumb.is-active{opacity:1;border-color:var(--accent)}
.project-card__body{display:flex;flex-direction:column;gap:12px;padding:16px;flex:1}
.project-card__title{font-size:16px;font-weight:600;letter-spacing:-0.01em;color:var(--text)}
.project-card__tech{display:flex;flex-wrap:wrap;gap:6px;list-style:none;padding:0;margin:0}
.tech-tag{font-family:var(--mono);font-size:11px;color:var(--muted);background:var(--surface-2);border:1px solid var(--border);border-radius:6px;padding:3px 9px;line-height:1.4}
.project-card__actions{display:flex;gap:8px;margin-top:auto;padding-top:4px}
.project-card__btn{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;font-family:var(--mono);font-size:12px;
  text-decoration:none;border-radius:8px;border:1px solid var(--border-strong);color:var(--text);background:transparent;transition:.2s}
.project-card__btn ion-icon{font-size:14px}
.project-card__btn:not(.is-disabled):hover{color:var(--on-accent);background:var(--accent);border-color:var(--accent)}
.project-card__btn.is-disabled{opacity:.4;cursor:not-allowed}

/* blog list (blog-list.js output: .blog-post-item > a) */
.blog-posts-list{list-style:none;display:flex;flex-direction:column;gap:16px;padding:0}
.blog-post-item>a{display:grid;grid-template-columns:200px 1fr;gap:22px;border:1px solid var(--border);border-radius:14px;
  overflow:hidden;background:var(--surface);transition:border-color .25s,transform .25s}
@media(max-width:560px){.blog-post-item>a{grid-template-columns:1fr}}
.blog-post-item>a:hover{border-color:var(--border-strong);transform:translateY(-3px)}
.blog-banner-box{margin:0;background:var(--surface-2);overflow:hidden}
.blog-banner-box img{width:100%;height:100%;object-fit:cover;min-height:150px}
.blog-content{padding:20px 20px 20px 0}
@media(max-width:560px){.blog-content{padding:0 20px 20px}}
.blog-meta{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;color:var(--muted);margin-bottom:10px}
.blog-category{color:var(--accent)}
.blog-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--muted)}
.blog-item-title{font-size:19px;font-weight:700;letter-spacing:-0.01em;color:var(--text);margin-bottom:8px}
.blog-post-item>a:hover .blog-item-title{color:var(--accent)}
.blog-text{color:var(--text2);font-size:14.5px}

/* pagination */
.pagination{display:flex;align-items:center;gap:12px;margin-top:28px;font-family:var(--mono);font-size:13px;color:var(--muted)}
.pagination button{background:var(--surface);border:1px solid var(--border);border-radius:8px;color:var(--text);
  width:34px;height:34px;cursor:pointer;transition:.2s}
.pagination button:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}
.pagination button:disabled{opacity:.35;cursor:not-allowed}

.empty-state{list-style:none;text-align:center;color:var(--muted);font-size:14px;padding:48px 16px;
  border:1px dashed var(--border);border-radius:14px}

/* resume detail */
.resume-block{margin-bottom:44px}
.resume-block h2{font-size:15px;font-family:var(--mono);text-transform:uppercase;letter-spacing:.1em;color:var(--accent);margin-bottom:20px}
.skill-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:14px}
.skill-row .cat{font-family:var(--mono);font-size:12px;color:var(--muted);min-width:180px}
@media(max-width:560px){.skill-row .cat{min-width:100%}}
.skill-tag{font-family:var(--mono);font-size:12px;color:var(--text2);background:var(--surface-2);border:1px solid var(--border);border-radius:6px;padding:4px 10px}
.ritem{display:flex;gap:20px;padding:16px 0;border-top:1px solid var(--border)}
.ritem:last-child{border-bottom:1px solid var(--border)}
.ritem .when{font-family:var(--mono);font-size:12px;color:var(--muted);white-space:nowrap;min-width:120px;padding-top:2px}
.ritem .rt{font-size:16px;font-weight:600}
.ritem .rs{color:var(--muted);font-size:14px;margin-top:2px}
.ritem .rlink{font-family:var(--mono);font-size:12px;color:var(--accent)}