/* ===================================================================
   IAN LIM — SITE STYLESHEET
   Shared by index.html and every page in /projects/.
   Design language: engineering drawing sheet / blueprint.
   =================================================================== */

:root{
  --navy:#0e2a44;
  --navy-deep:#0a2036;
  --line:#7fc7ff;
  --line-dim:rgba(127,199,255,0.22);
  --paper:#eef0e6;
  --paper-dim:#b9c2c9;
  --copper:#e3903f;
  --copper-dim:#e3903f66;
  --ok:#7bd88f;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--navy);
  color:var(--paper);
  font-family:'IBM Plex Sans', sans-serif;
  line-height:1.5;
  background-image:
    linear-gradient(var(--line-dim) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-dim) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: -1px -1px;
}
::selection{background:var(--copper); color:var(--navy-deep);}
a{color:var(--line);}
img{max-width:100%; display:block;}
h1,h2,h3{font-family:'Space Grotesk', sans-serif; margin:0; letter-spacing:0.01em;}
.mono{font-family:'IBM Plex Mono', monospace;}
.label{
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--line);
  opacity:0.85;
}
.wrap{max-width:1040px; margin:0 auto; padding:0 28px;}

/* corner crosshairs on sheets */
.sheet{
  position:relative;
  border:1px solid var(--line-dim);
  background:rgba(10,32,54,0.35);
  padding:48px 40px;
  margin:0 auto 64px;
}
.sheet::before,.sheet::after,.sheet .cx1,.sheet .cx2{
  content:"";
  position:absolute;
  width:16px; height:16px;
  border:1px solid var(--line);
  opacity:0.6;
}
.sheet::before{ top:-1px; left:-1px; border-right:none; border-bottom:none; }
.sheet::after{ top:-1px; right:-1px; border-left:none; border-bottom:none; }
.sheet .cx1{ bottom:-1px; left:-1px; border-right:none; border-top:none; }
.sheet .cx2{ bottom:-1px; right:-1px; border-left:none; border-top:none; }

header.top{
  position:sticky; top:0; z-index:50;
  background:rgba(10,32,54,0.86);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line-dim);
}
.topbar{
  max-width:1040px; margin:0 auto; padding:16px 28px;
  display:flex; align-items:center; justify-content:space-between;
  position:relative;
}
.topbar .mark{font-family:'IBM Plex Mono', monospace; font-size:13px; letter-spacing:0.08em; text-decoration:none; color:var(--paper);}
.topbar .mark span{color:var(--copper);}
.nav-toggle{
  display:none;
  width:40px; height:40px; padding:9px;
  border:1px solid var(--line-dim);
  background:transparent; color:var(--paper);
  cursor:pointer;
}
.nav-toggle span{
  display:block; height:1px; width:100%;
  background:currentColor; margin:5px 0;
  transition:transform .15s, opacity .15s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
nav a{
  font-family:'IBM Plex Mono', monospace;
  font-size:12px; letter-spacing:0.08em; text-transform:uppercase;
  color:var(--paper-dim); text-decoration:none; margin-left:22px;
  border-bottom:1px solid transparent; padding-bottom:2px;
  transition:color .15s, border-color .15s;
}
nav a:hover{color:var(--line); border-color:var(--line);}

@media(max-width:760px){
  .topbar{padding-top:10px; padding-bottom:10px;}
  .nav-toggle{display:block;}
  .topbar nav{
    display:none;
    position:absolute; top:100%; left:0; right:0;
    padding:8px 28px 18px;
    background:rgba(10,32,54,0.98);
    border-bottom:1px solid var(--line-dim);
  }
  .topbar nav.is-open{display:block;}
  .topbar nav a{
    display:block; margin:0; padding:12px 0;
    border-bottom:1px solid var(--line-dim);
  }
  .topbar nav a:last-child{border-bottom:none;}
}

/* HERO / TITLE BLOCK (index page) */
.hero{padding:72px 0 0;}
.hero .eyebrow{margin-bottom:18px;}
.hero h1{
  font-size:clamp(40px, 7vw, 78px);
  font-weight:700;
  color:var(--paper);
  line-height:1.02;
}
.hero h1 em{ font-style:normal; color:var(--copper); }
.hero .tagline{ max-width:560px; margin-top:18px; font-size:17px; color:var(--paper-dim); }

.titleblock{
  margin:44px 0 60px;
  border:1px solid var(--line);
  font-family:'IBM Plex Mono', monospace;
  font-size:12px;
  display:grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
}
.titleblock .cell{ padding:12px 14px; border-top:1px solid var(--line-dim); border-left:1px solid var(--line-dim); }
.titleblock .cell:nth-child(-n+5){border-top:none;}
.titleblock .cell:nth-child(5n+1){border-left:none;}
.titleblock .cell .k{color:var(--paper-dim); font-size:10px; letter-spacing:0.1em; text-transform:uppercase; margin-bottom:5px;}
.titleblock .cell .v{color:var(--paper); font-size:12.5px;}
.titleblock .cell .v a{color:var(--paper); text-decoration:none; border-bottom:1px dotted var(--paper-dim);}
.titleblock .cell .v a:hover{color:var(--copper); border-color:var(--copper);}
.titleblock .wide{grid-column:1 / span 2;}
.titleblock .contact-wide{grid-column:span 3;}
@media(max-width:720px){
  .titleblock{grid-template-columns:1fr 1fr;}
  .titleblock .cell:nth-child(-n+5){border-top:1px solid var(--line-dim);}
  .titleblock .cell:nth-child(2n+1){border-left:none;}
  .titleblock .cell:nth-child(1){border-top:none;}
  .titleblock .wide,.titleblock .contact-wide{grid-column:1 / span 2;}
}

section{padding:8px 0 8px;}
.section-head{ display:flex; align-items:baseline; gap:16px; margin-bottom:34px; }
.section-head .num{font-family:'IBM Plex Mono', monospace; color:var(--copper); font-size:13px;}
.section-head h2{font-size:28px;}
.section-head .rule{flex:1; height:1px; background:var(--line-dim);}

/* EXPERIENCE — revision-table style */
.rev-row{ display:grid; grid-template-columns: 100px 1fr; gap:24px; padding:22px 0; border-top:1px solid var(--line-dim); }
.rev-row:last-child{border-bottom:1px solid var(--line-dim);}
.rev-row .when{ font-family:'IBM Plex Mono', monospace; font-size:11.5px; color:var(--line); opacity:0.9; padding-top:3px; }
.rev-row h3{font-size:18px; color:var(--paper); margin-bottom:2px;}
.rev-row .role{color:var(--copper); font-size:13px; font-family:'IBM Plex Mono', monospace; margin-bottom:10px; display:block;}
.rev-row ul{margin:0; padding-left:18px; color:var(--paper-dim); font-size:14.5px;}
.rev-row li{margin-bottom:6px;}
.rev-row li::marker{color:var(--line);}

/* PROJECTS — datasheet cards */
.datasheets{display:grid; grid-template-columns:repeat(auto-fit, minmax(300px,1fr)); gap:22px;}
.datasheet{
  border:1px solid var(--line-dim);
  background:rgba(238,240,230,0.02);
  padding:22px;
  display:flex; flex-direction:column;
  transition:border-color .15s, transform .15s;
  text-decoration:none;
  color:inherit;
}
.datasheet:hover{border-color:var(--line); transform:translateY(-2px);}
.datasheet .dsid{font-family:'IBM Plex Mono', monospace; font-size:10.5px; color:var(--paper-dim); letter-spacing:0.08em; margin-bottom:10px;}
.datasheet h3{font-size:17px; margin-bottom:10px; color:var(--paper);}
.datasheet p{font-size:13.8px; color:var(--paper-dim); margin:0 0 14px; flex:1;}
.chips{display:flex; flex-wrap:wrap; gap:6px; margin-bottom:14px;}
.chip{
  font-family:'IBM Plex Mono', monospace; font-size:10.5px;
  border:1px solid var(--line-dim); color:var(--line);
  padding:3px 8px; letter-spacing:0.03em;
}
.dslink{
  font-family:'IBM Plex Mono', monospace; font-size:12px;
  color:var(--copper); text-decoration:none; display:inline-flex; align-items:center; gap:6px;
}
.dslink:hover{text-decoration:underline;}

/* progress / status badges — used on cards and project pages for
   projects that aren't finished yet */
.status-badge{
  font-family:'IBM Plex Mono', monospace;
  font-size:9.5px; letter-spacing:0.1em; text-transform:uppercase;
  padding:3px 7px;
  border:1px solid;
  display:inline-block;
}
.status-badge.done{ color:var(--ok); border-color:var(--ok); }
.status-badge.progress{ color:var(--copper); border-color:var(--copper); }
.status-badge.planned{ color:var(--paper-dim); border-color:var(--paper-dim); }

.progress-wrap{ margin:10px 0 14px; }
.progress-top{
  display:flex; justify-content:space-between; align-items:baseline;
  margin-bottom:6px;
  font-family:'IBM Plex Mono', monospace; font-size:10.5px;
  color:var(--paper-dim); letter-spacing:0.04em;
}
.progress-top .pct{color:var(--copper);}
.progress-track{
  position:relative;
  height:8px;
  border:1px solid var(--line-dim);
  background:
    repeating-linear-gradient(90deg,
      var(--line-dim) 0, var(--line-dim) 1px,
      transparent 1px, transparent 25%);
}
.progress-fill{
  height:100%;
  background:var(--copper);
  transition:width .3s ease;
}
/* smaller variant used inline on card grids */
.progress-track.mini{height:5px;}
.progress-wrap.mini .progress-top{font-size:9.5px; margin-bottom:4px;}

/* SKILLS — bill of materials */
table.bom{width:100%; border-collapse:collapse; font-size:14px;}
table.bom th{
  text-align:left; font-family:'IBM Plex Mono', monospace; font-size:10.5px;
  letter-spacing:0.1em; text-transform:uppercase; color:var(--line);
  padding:10px 12px; border-bottom:1px solid var(--line);
}
table.bom td{padding:12px; border-bottom:1px solid var(--line-dim); color:var(--paper-dim); vertical-align:top;}
table.bom tr td:first-child{color:var(--paper); font-family:'IBM Plex Mono', monospace; font-size:12.5px; white-space:nowrap;}
table.bom tr:hover td{background:rgba(127,199,255,0.04);}

/* EDUCATION */
.edu-grid{display:grid; grid-template-columns:1fr 1fr; gap:22px;}
@media(max-width:720px){.edu-grid{grid-template-columns:1fr;}}
.edu-card{border:1px solid var(--line-dim); padding:22px;}
.edu-card .when{font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--line);}
.edu-card h3{font-size:17px; margin:8px 0 4px;}
.edu-card .sub{color:var(--paper-dim); font-size:13.5px; margin-bottom:12px;}
.marks{width:100%; font-family:'IBM Plex Mono', monospace; font-size:12.5px; border-collapse:collapse;}
.marks td{padding:5px 0; border-bottom:1px dotted var(--line-dim); color:var(--paper-dim);}
.marks td:last-child{text-align:right; color:var(--copper);}
.honours{margin:12px 0 0; padding-left:18px; font-size:13px; color:var(--paper-dim);}
.honours li::marker{color:var(--line);}

/* INTERESTS strip */
.interests{display:flex; gap:16px; flex-wrap:wrap;}
.int-card{border:1px solid var(--line-dim); padding:16px 18px; flex:1; min-width:180px;}
.int-card .label{margin-bottom:6px;}
.int-card p{margin:0; font-size:13.5px; color:var(--paper-dim);}

footer{ border-top:1px solid var(--line-dim); padding:40px 0 60px; text-align:center; }
footer .mono{font-size:11.5px; color:var(--paper-dim); letter-spacing:0.05em;}
footer a{color:var(--copper); text-decoration:none;}
footer a:hover{text-decoration:underline;}

/* ===================================================================
   PROJECT DETAIL PAGES (/projects/*.html)
   =================================================================== */

.breadcrumb{
  padding:28px 0 0;
  font-family:'IBM Plex Mono', monospace;
  font-size:11.5px;
  color:var(--paper-dim);
}
.breadcrumb a{color:var(--line); text-decoration:none;}
.breadcrumb a:hover{text-decoration:underline;}

.proj-hero{padding:20px 0 0;}
.proj-hero .dsid{margin-bottom:16px;}
.proj-hero h1{
  font-size:clamp(32px, 5.5vw, 54px);
  font-weight:700;
  line-height:1.05;
  margin-bottom:16px;
}
.proj-hero .dek{
  max-width:640px;
  font-size:16.5px;
  color:var(--paper-dim);
  margin-bottom:28px;
}
.proj-meta{
  display:flex; flex-wrap:wrap; gap:0;
  border:1px solid var(--line);
  font-family:'IBM Plex Mono', monospace;
  font-size:12px;
  margin-bottom:40px;
}
.proj-meta .cell{
  padding:12px 16px;
  border-left:1px solid var(--line-dim);
  flex:1; min-width:120px;
}
.proj-meta .cell:first-child{border-left:none;}
.proj-meta .k{color:var(--paper-dim); font-size:10px; letter-spacing:0.1em; text-transform:uppercase; margin-bottom:5px;}
.proj-meta .v{color:var(--paper);}
.proj-meta .v a{color:var(--copper); text-decoration:none;}
.proj-meta .v a:hover{text-decoration:underline;}

/* progress readout on project detail pages — bigger version of the
   card-level bar, sits right under the title block */
.proj-progress{
  border:1px solid var(--line-dim);
  padding:16px 20px;
  margin-bottom:40px;
}
.proj-progress .progress-top{font-size:11.5px;}
.proj-progress .progress-track{height:10px;}
.proj-progress .note{
  margin-top:10px; font-size:12.5px; color:var(--paper-dim);
}

.proj-figure{
  border:1px solid var(--line-dim);
  margin-bottom:56px;
  background:rgba(238,240,230,0.02);
}
.proj-figure img{width:100%;}
.proj-figure .cap{
  padding:10px 16px;
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  color:var(--paper-dim);
  border-top:1px solid var(--line-dim);
}

.architecture-diagram{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
  padding:34px;
}
.architecture-node{
  position:relative;
  border:1px solid var(--line);
  padding:18px;
  min-height:150px;
}
.architecture-node:not(:last-child)::after{
  content:"\2192";
  position:absolute;
  left:calc(100% + 8px); top:50%;
  width:12px;
  color:var(--copper);
  font-family:'IBM Plex Mono', monospace;
  transform:translateY(-50%);
}
.architecture-node .node-id{
  font-family:'IBM Plex Mono', monospace;
  font-size:10px; letter-spacing:0.1em;
  color:var(--copper);
}
.architecture-node h3{font-size:16px; margin:8px 0;}
.architecture-node p{font-size:12.5px; color:var(--paper-dim); margin:0;}

.project-update{
  border-top:1px solid var(--line-dim);
  padding:18px 0 6px;
}
.project-update time{
  display:block;
  margin-bottom:7px;
  font-family:'IBM Plex Mono', monospace;
  font-size:10.5px; letter-spacing:0.08em;
  color:var(--copper);
}
.project-update h3{font-size:17px; margin-bottom:8px;}
.project-update p{margin-bottom:10px;}

@media(max-width:720px){
  .architecture-diagram{grid-template-columns:1fr; gap:30px; padding:22px;}
  .architecture-node{min-height:0;}
  .architecture-node:not(:last-child)::after{
    content:"\2193";
    left:50%; top:calc(100% + 7px);
    transform:translateX(-50%);
  }
}

.proj-body{
  display:grid;
  grid-template-columns: 1fr 260px;
  gap:56px;
  align-items:start;
}
@media(max-width:800px){ .proj-body{grid-template-columns:1fr;} }

.story h2{ font-size:22px; margin:44px 0 16px; }
.story h2:first-child{margin-top:0;}
.story p{ font-size:15px; color:var(--paper-dim); margin:0 0 16px; max-width:640px; }
.story ul{ padding-left:20px; color:var(--paper-dim); font-size:15px; max-width:620px; }
.story li{margin-bottom:8px;}
.story li::marker{color:var(--line);}
.story blockquote{
  margin:24px 0; padding:14px 20px;
  border-left:2px solid var(--copper);
  color:var(--paper);
  font-size:15px;
  font-style:normal;
}
.story code, .story pre{
  font-family:'IBM Plex Mono', monospace;
  font-size:13px;
}
.story pre{
  background:rgba(10,32,54,0.6);
  border:1px solid var(--line-dim);
  padding:16px;
  overflow-x:auto;
  color:var(--paper);
}

/* sidebar: spec sheet + timeline */
.side-block{ border:1px solid var(--line-dim); margin-bottom:24px; }
.side-block .side-head{
  font-family:'IBM Plex Mono', monospace; font-size:10.5px; letter-spacing:0.1em;
  text-transform:uppercase; color:var(--line);
  padding:10px 14px; border-bottom:1px solid var(--line-dim);
}
.spec-table{width:100%; font-family:'IBM Plex Mono', monospace; font-size:12px; border-collapse:collapse;}
.spec-table td{padding:9px 14px; border-bottom:1px dotted var(--line-dim); color:var(--paper-dim); vertical-align:top;}
.spec-table tr:last-child td{border-bottom:none;}
.spec-table td:first-child{color:var(--paper-dim); opacity:0.8; white-space:nowrap;}
.spec-table td:last-child{color:var(--paper); text-align:right;}

.timeline{padding:14px;}
.tl-item{ position:relative; padding-left:20px; padding-bottom:16px; border-left:1px solid var(--line-dim); margin-left:4px; }
.tl-item:last-child{border-left:1px solid transparent; padding-bottom:0;}
.tl-item::before{
  content:""; position:absolute; left:-4.5px; top:2px;
  width:8px; height:8px; border-radius:50%;
  background:var(--copper);
}
.tl-item .tl-when{font-family:'IBM Plex Mono', monospace; font-size:10.5px; color:var(--line); margin-bottom:3px;}
.tl-item .tl-what{font-size:13px; color:var(--paper-dim);}

.side-links{padding:6px 0;}
.side-links a{
  display:block; padding:10px 14px; font-family:'IBM Plex Mono', monospace; font-size:12.5px;
  color:var(--copper); text-decoration:none; border-bottom:1px solid var(--line-dim);
}
.side-links a:last-child{border-bottom:none;}
.side-links a:hover{background:rgba(127,199,255,0.05);}

.gallery{
  display:grid; grid-template-columns:repeat(auto-fit, minmax(220px,1fr)); gap:14px;
  margin:32px 0 48px;
}
.gallery .g-item{border:1px solid var(--line-dim); background:rgba(238,240,230,0.02);}
.gallery .g-item img{width:100%;}
.gallery .g-item .cap{padding:8px 12px; font-family:'IBM Plex Mono', monospace; font-size:10.5px; color:var(--paper-dim); border-top:1px solid var(--line-dim);}

.proj-nav{
  display:flex; justify-content:space-between; gap:20px;
  border-top:1px solid var(--line-dim);
  padding:28px 0 0;
  margin-top:20px;
}
.proj-nav a{
  font-family:'IBM Plex Mono', monospace; font-size:12.5px;
  color:var(--paper-dim); text-decoration:none;
  display:flex; flex-direction:column; gap:4px;
}
.proj-nav a:hover .proj-nav-title{color:var(--copper);}
.proj-nav .dir{font-size:10px; letter-spacing:0.1em; text-transform:uppercase; color:var(--line);}
.proj-nav .proj-nav-title{color:var(--paper); font-family:'Space Grotesk', sans-serif; font-size:15px;}
.proj-nav .next{text-align:right; align-items:flex-end;}

@media (prefers-reduced-motion: reduce){
  *{transition:none !important; scroll-behavior:auto !important;}
}