/*
Theme Name: Arjun Tech Preview
Author: Arjun
Description: A dark, systems-inspired portfolio and writing theme.
Version: 0.1.1
*/

:root {
  --ink: #e8f0f7;
  --muted: #8da2b8;
  --faint: #53677c;
  --night: #06101c;
  --navy: #091726;
  --panel: #0d1d2e;
  --line: rgba(157, 184, 210, 0.16);
  --cyan: #5edbd3;
  --amber: #ffb86b;
  --max: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 76% 5%, rgba(34, 98, 123, .18), transparent 32rem),
    linear-gradient(180deg, #071321 0%, var(--night) 58%, #050d17 100%);
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .2;
  background-image:
    linear-gradient(rgba(115, 151, 180, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(115, 151, 180, .055) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(to bottom, black, transparent 75%);
}
a { color: inherit; }
.wrap { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.mono { font-family: "JetBrains Mono", Consolas, monospace; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(6, 16, 28, .78);
  backdrop-filter: blur(18px);
}
.admin-bar .site-header { top: 32px; }
.nav { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 700; letter-spacing: -.02em; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  color: var(--night);
  background: var(--cyan);
  border-radius: 9px 9px 9px 3px;
  font: 700 13px/1 "JetBrains Mono", monospace;
  box-shadow: 0 0 28px rgba(94, 219, 211, .22);
}
.nav-links { display: flex; align-items: center; gap: 26px; color: var(--muted); font-size: 14px; }
.nav-links a { text-decoration: none; transition: color .2s ease; }
.nav-links a:hover { color: var(--ink); }
.nav-github { padding: 8px 13px; border: 1px solid var(--line); border-radius: 9px; color: var(--ink) !important; }

.hero { min-height: 630px; display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: clamp(48px, 8vw, 112px); padding-block: 82px 96px; }
.eyebrow, .section-label { margin: 0 0 22px; color: var(--cyan); font: 600 12px/1.4 "JetBrains Mono", Consolas, monospace; letter-spacing: .14em; text-transform: uppercase; }
.eyebrow::before, .section-label::before { content: "// "; color: var(--faint); }
.hero h1 { max-width: 720px; margin: 0; font-size: clamp(46px, 5.6vw, 72px); line-height: 1.02; letter-spacing: -.06em; }
.hero h1 span { color: var(--cyan); }
.hero-copy { max-width: 620px; margin: 30px 0 0; color: #aebfce; font-size: clamp(17px, 1.8vw, 21px); line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 38px; }
.button { display: inline-flex; align-items: center; gap: 9px; padding: 11px 17px; border: 1px solid var(--line); border-radius: 10px; text-decoration: none; font: 600 13px/1.4 "JetBrains Mono", monospace; transition: transform .2s ease, border-color .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); border-color: rgba(94, 219, 211, .5); }
.button-primary { color: #07131e; background: var(--cyan); border-color: var(--cyan); }
.button-quiet { background: rgba(255, 255, 255, .025); }

.system-card { position: relative; padding: 24px; border: 1px solid rgba(94, 219, 211, .24); border-radius: 18px; background: linear-gradient(145deg, rgba(15, 34, 52, .97), rgba(7, 20, 34, .92)); box-shadow: 0 30px 90px rgba(0, 0, 0, .34), 0 0 55px rgba(59, 162, 168, .08), inset 0 1px rgba(255, 255, 255, .035); overflow: hidden; }
.system-card::after { content: ""; position: absolute; width: 210px; height: 210px; right: -75px; top: -85px; border-radius: 50%; background: rgba(94, 219, 211, .14); filter: blur(34px); }
.system-scan { position: absolute; z-index: 0; left: 0; right: 0; top: 12%; height: 1px; opacity: .42; background: linear-gradient(90deg, transparent, var(--cyan), transparent); box-shadow: 0 0 18px var(--cyan); animation: scan 5.5s linear infinite; }
.system-top { position: relative; z-index: 2; display: flex; justify-content: space-between; align-items: center; margin-bottom: 26px; color: var(--muted); font: 10px/1.4 "JetBrains Mono", monospace; letter-spacing: .08em; }
.live { display: inline-flex; align-items: center; gap: 7px; color: var(--cyan); }
.live::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 5px rgba(94, 219, 211, .1); animation: pulse 2.4s ease-in-out infinite; }
.system-grid { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0, 1fr) 108px; gap: 22px; }
.pipeline { position: relative; display: grid; gap: 0; }
.flow-rail { position: absolute; z-index: 0; left: 19px; top: 35px; bottom: 35px; width: 2px; background: linear-gradient(transparent, rgba(94, 219, 211, .28) 10%, rgba(94, 219, 211, .28) 90%, transparent); }
.flow-rail i { position: absolute; left: -2px; top: 0; width: 6px; height: 18px; border-radius: 6px; background: var(--cyan); box-shadow: 0 0 8px var(--cyan), 0 0 20px rgba(94, 219, 211, .75); animation: data-flow 3.2s cubic-bezier(.45, 0, .55, 1) infinite; }
.node { position: relative; z-index: 1; display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 13px; padding: 13px 8px 13px 0; border-radius: 11px; }
.node.is-active { background: linear-gradient(90deg, rgba(94, 219, 211, .09), transparent); }
.node.is-active::after { content: ""; position: absolute; inset: 5px 0 5px 37px; border-left: 2px solid var(--cyan); pointer-events: none; }
.node-id { display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid rgba(94, 219, 211, .28); border-radius: 10px; color: var(--cyan); background: rgba(94, 219, 211, .055); font: 11px/1 "JetBrains Mono", monospace; }
.node-title { font-weight: 650; }
.node-meta { display: block; margin-top: 2px; color: var(--faint); font: 11px/1.5 "JetBrains Mono", monospace; }
.node-state { color: var(--muted); font: 9px/1 "JetBrains Mono", monospace; }
.node.is-active .node-state { padding: 5px 7px; border-radius: 5px; color: var(--night); background: var(--cyan); font-weight: 700; }
.telemetry { display: grid; align-content: stretch; border-left: 1px solid var(--line); }
.metric { display: flex; flex-direction: column; justify-content: center; min-height: 82px; padding: 10px 0 10px 17px; border-bottom: 1px solid var(--line); }
.metric:last-child { border-bottom: 0; }
.metric > span { color: var(--faint); font: 8px/1.3 "JetBrains Mono", monospace; letter-spacing: .1em; }
.metric strong { margin: 7px 0 9px; font: 600 19px/1 "JetBrains Mono", monospace; }
.metric strong small { margin-left: 2px; color: var(--muted); font-size: 8px; font-weight: 400; }
.meter { height: 3px; border-radius: 3px; background: rgba(255, 255, 255, .07); overflow: hidden; }
.meter i { display: block; height: 100%; border-radius: inherit; background: var(--cyan); box-shadow: 0 0 8px rgba(94, 219, 211, .5); }
.spark { height: 13px; display: flex; align-items: end; gap: 3px; }
.spark i { width: 4px; background: rgba(94, 219, 211, .72); border-radius: 2px 2px 0 0; animation: bars 1.8s ease-in-out infinite alternate; }
.spark i:nth-child(1) { height: 38%; animation-delay: -.3s; }.spark i:nth-child(2) { height: 75%; animation-delay: -.9s; }.spark i:nth-child(3) { height: 48%; animation-delay: -.5s; }.spark i:nth-child(4) { height: 92%; animation-delay: -1.2s; }.spark i:nth-child(5) { height: 62%; animation-delay: -.7s; }
.system-log { position: relative; z-index: 2; margin-top: 22px; padding: 13px 15px; border: 1px solid var(--line); border-radius: 10px; background: rgba(1, 8, 15, .58); color: var(--muted); font: 10px/1.8 "JetBrains Mono", monospace; }
.system-log > span { color: var(--cyan); }
.system-log b { color: var(--amber); font-weight: 500; }
.cursor { display: inline-block; width: 6px; height: 11px; margin-left: 4px; vertical-align: -2px; background: var(--cyan); animation: blink 1s steps(1) infinite; }

.section { padding-block: 96px; border-top: 1px solid var(--line); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 38px; }
.section-heading h2 { margin: 0; font-size: clamp(31px, 4.5vw, 52px); line-height: 1.1; letter-spacing: -.045em; }
.section-heading > a { color: var(--muted); font: 12px/1.5 "JetBrains Mono", monospace; text-decoration: none; }
.project-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.project-card { min-height: 290px; display: flex; flex-direction: column; padding: 28px; border: 1px solid var(--line); border-radius: 16px; background: rgba(13, 29, 46, .72); text-decoration: none; transition: transform .22s ease, border-color .22s ease, background .22s ease; }
.project-card:hover { transform: translateY(-5px); border-color: rgba(94, 219, 211, .42); background: rgba(15, 35, 55, .9); }
.project-card-top { display: flex; justify-content: space-between; color: var(--faint); font: 11px/1.4 "JetBrains Mono", monospace; }
.project-card h3 { margin: 52px 0 12px; font-size: 25px; line-height: 1.2; letter-spacing: -.035em; }
.project-card p { margin: 0; color: var(--muted); line-height: 1.75; }
.stack { margin-top: auto !important; padding-top: 28px; color: var(--cyan) !important; font: 11px/1.6 "JetBrains Mono", monospace; }

.notes { display: grid; }
.note { display: grid; grid-template-columns: 130px 1fr auto; align-items: start; gap: 32px; padding: 27px 4px; border-top: 1px solid var(--line); text-decoration: none; transition: padding-left .2s ease, color .2s ease; }
.note:last-child { border-bottom: 1px solid var(--line); }
.note:hover { padding-left: 12px; }
.note-date, .note-arrow { color: var(--faint); font: 11px/1.7 "JetBrains Mono", monospace; }
.note h3 { margin: 0 0 5px; font-size: 21px; line-height: 1.35; letter-spacing: -.025em; }
.note p { margin: 0; color: var(--muted); }
.note:hover .note-arrow { color: var(--cyan); }

.site-footer { padding-block: 38px; border-top: 1px solid var(--line); color: var(--faint); font: 11px/1.7 "JetBrains Mono", monospace; }
.footer-row { display: flex; justify-content: space-between; gap: 24px; }

.content { width: min(calc(100% - 40px), 760px); margin: 0 auto; padding-block: 92px; }
.content h1 { margin: 0 0 24px; font-size: clamp(40px, 6vw, 68px); line-height: 1.06; letter-spacing: -.05em; }
.content h2 { margin-top: 2em; }
.content p, .content li { color: #b7c6d4; }
.content a { color: var(--cyan); }

@keyframes pulse { 50% { opacity: .45; transform: scale(.85); } }
@keyframes data-flow { 0% { top: 0; opacity: 0; } 12% { opacity: 1; } 88% { opacity: 1; } 100% { top: calc(100% - 18px); opacity: 0; } }
@keyframes scan { 0% { top: 8%; opacity: 0; } 12% { opacity: .42; } 88% { opacity: .42; } 100% { top: 92%; opacity: 0; } }
@keyframes bars { to { transform: scaleY(.45); opacity: .45; } }
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; animation: none !important; transition: none !important; } }
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding-block: 76px; }
  .system-card { max-width: 600px; }
  .project-grid { grid-template-columns: 1fr; }
  .note { grid-template-columns: 1fr auto; gap: 8px 20px; }
  .note-date { grid-column: 1 / -1; }
  .note p { display: none; }
}
@media (max-width: 560px) {
  .wrap { width: min(calc(100% - 28px), var(--max)); }
  .nav-links a:not(.nav-github) { display: none; }
  .hero h1 { font-size: 47px; }
  .hero-copy { font-size: 17px; }
  .section { padding-block: 72px; }
  .project-card { min-height: 260px; padding: 23px; }
  .system-grid { grid-template-columns: 1fr; }
  .telemetry { grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 0; }
  .metric { min-height: 72px; padding: 13px 10px 0; border-right: 1px solid var(--line); border-bottom: 0; }
  .metric:last-child { border-right: 0; }
  .footer-row { flex-direction: column; }
}