/* =========================================================
   Shah Faisal — Portfolio
   Design system: "box-grid" — bounding boxes, corner marks,
   monospace coordinate tags, blueprint-inspired accent.
   ========================================================= */

:root{
  --bg: #F3F4EF;
  --surface: #FFFFFF;
  --ink: #12141A;
  --ink-soft: #52565E;
  --ink-faint: #8A8D95;
  --line: #12141A;
  --line-soft: rgba(18,20,26,0.14);
  --line-faint: rgba(18,20,26,0.07);
  --accent: #FF4D1C;
  --accent-ink: #12141A;
  --accent-2: #2A55E0;
  --success: #1AA36B;

  --font-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --radius: 2px;
  --gap: clamp(1rem, 2vw, 1.5rem);
  --container: 1120px;
  --dur: 220ms;
  --ease: cubic-bezier(.2,.7,.2,1);
}

[data-theme="dark"]{
  --bg: #101114;
  --surface: #17181C;
  --ink: #F3F4EF;
  --ink-soft: #A7AAB2;
  --ink-faint: #6E7178;
  --line: #F3F4EF;
  --line-soft: rgba(243,244,239,0.16);
  --line-faint: rgba(243,244,239,0.07);
  --accent: #FF6A38;
  --accent-ink: #101114;
  --accent-2: #6E8CFF;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *,*::before,*::after{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ margin: 0; padding: 0; list-style: none; }
h1,h2,h3{ margin: 0; font-family: var(--font-mono); letter-spacing: -0.01em; }
p{ margin: 0; }

.skip-link{
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: var(--accent-ink);
  padding: .6rem 1rem; z-index: 999; font-family: var(--font-mono);
}
.skip-link:focus{ left: 1rem; top: 1rem; }

:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- background grid ---------- */
.bg-grid{
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(var(--line-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-faint) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 90%);
}

/* ---------- layout helpers ---------- */
.section{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gap) clamp(2rem, 4vw, 3.5rem);
}

/* ---------- box + corner-mark signature element ---------- */
.box{
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line-soft);
  padding: clamp(1.25rem, 3vw, 2.25rem);
  transition: border-color var(--dur) var(--ease);
}
.box::before,
.box::after,
.box > .tag::before{ content: ""; }

/* corner brackets */
.box::before,
.box::after{
  position: absolute;
  width: 14px; height: 14px;
  border: 1.5px solid var(--ink-faint);
  pointer-events: none;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.box::before{ top: -1px; left: -1px; border-right: none; border-bottom: none; }
.box::after{ bottom: -1px; right: -1px; border-left: none; border-top: none; }
.box:hover::before{ transform: translate(-3px,-3px); border-color: var(--accent); }
.box:hover::after{ transform: translate(3px,3px); border-color: var(--accent); }

.box-accent{
  border-color: var(--accent);
}
.box-accent::before,
.box-accent::after{ border-color: var(--accent); }

.tag{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin-bottom: 1.1rem;
}

/* ---------- reveal-on-scroll ---------- */
[data-reveal]{
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 560ms var(--ease), transform 560ms var(--ease);
}
[data-reveal].is-visible{ opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce){
  [data-reveal]{ opacity: 1; transform: none; }
}

/* ================= NAV ================= */
.site-nav{
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border: none;
  border-bottom: 1px solid var(--line-soft);
  padding: 0;
}
.site-nav::before,.site-nav::after{ display: none; }
.nav-inner{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0.9rem var(--gap);
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem;
}
.logo{
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}
.logo-bracket{ color: var(--accent); }

.nav-links{
  display: flex; gap: 1.6rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.nav-links a{
  display: inline-flex; align-items: baseline; gap: .4rem;
  color: var(--ink-soft);
  padding: .3rem 0;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav-links a:hover{ color: var(--ink); border-color: var(--accent); }
.nav-links .idx{ color: var(--ink-faint); font-size: 0.72rem; }

.nav-actions{ display: flex; align-items: center; gap: .5rem; }
.icon-btn{
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border: 1px solid var(--line-soft);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.icon-btn:hover{ border-color: var(--accent); color: var(--accent); }
.icon-btn svg{ width: 18px; height: 18px; }
.menu-btn{ display: none; }

.icon-btn .moon{ display: none; }
[data-theme="dark"] .icon-btn .sun{ display: none; }
[data-theme="dark"] .icon-btn .moon{ display: block; }

/* ================= HERO ================= */
.hero{ max-width: var(--container); margin: 0 auto; padding: clamp(2.5rem,6vw,4.5rem) var(--gap) 2rem; }
.hero-grid{
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: var(--gap);
  align-items: stretch;
}
.hero-main{ display: flex; flex-direction: column; justify-content: center; }
.eyebrow{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  letter-spacing: 0.03em;
  margin-bottom: .9rem;
}
.display{
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.02;
  font-weight: 700;
  margin-bottom: 1.1rem;
}
.hero-lede{
  max-width: 52ch;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  margin-bottom: 1.8rem;
}
.hero-actions{ display: flex; flex-wrap: wrap; gap: .8rem; }

.btn{
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  padding: .8rem 1.2rem;
  border: 1px solid var(--line);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn svg{ width: 15px; height: 15px; }
.btn-primary{ background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover{ transform: translate(-2px,-2px); box-shadow: 3px 3px 0 var(--ink); }
.btn-ghost{ background: transparent; color: var(--ink); }
.btn-ghost:hover{ border-color: var(--accent); color: var(--accent); }

.hero-card{ display: flex; flex-direction: column; }
.avatar-wrap{ position: relative; width: 72px; margin-bottom: 1.2rem; }
.avatar{ border: 1px solid var(--line-soft); border-radius: var(--radius); }
.status-dot{
  position: absolute; bottom: -3px; right: -3px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--success);
  border: 2px solid var(--surface);
}
.spec-list{ margin: 0 0 1.4rem; }
.spec-row{
  display: flex; justify-content: space-between; gap: 1rem;
  padding: .55rem 0;
  border-bottom: 1px dashed var(--line-faint);
  font-family: var(--font-mono);
  font-size: 0.86rem;
}
.spec-row:last-child{ border-bottom: none; }
.spec-row dt{ color: var(--ink-faint); }
.spec-row dd{ margin: 0; text-align: right; color: var(--ink); }
.status-text{ color: var(--success); }

.spec-stats{
  margin-top: auto;
  display: flex; gap: 1.4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line-faint);
}
.stat{ display: flex; flex-direction: column; }
.stat-num{ font-family: var(--font-mono); font-size: 1.3rem; font-weight: 700; }
.stat-label{ font-size: 0.72rem; color: var(--ink-faint); text-transform: uppercase; letter-spacing: .06em; }

/* ================= TYPE / SECTIONS ================= */
h2{ font-size: clamp(1.4rem, 2.6vw, 1.9rem); margin-bottom: .8rem; }
.section-lede{ color: var(--ink-soft); margin-bottom: 1.6rem; max-width: 60ch; }

.about-grid{
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.6rem;
  color: var(--ink-soft);
}
.about-grid p{ margin: 0; }

/* focus chips */
.chip-grid{ display: flex; flex-wrap: wrap; gap: .6rem; }
.chip{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: .5rem .85rem;
  border: 1px solid var(--line-soft);
  color: var(--ink-soft);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.chip:hover{ border-color: var(--accent); color: var(--ink); }

/* eleone hub */
.eleone-grid{
  display: grid; grid-template-columns: 1.5fr 1fr; gap: 2rem; align-items: center;
}
.eleone-grid h2{ margin-bottom: .9rem; }
.eleone-grid p{ color: var(--ink-soft); margin-bottom: 1rem; }
.mini-list{ display: flex; flex-direction: column; gap: .5rem; }
.mini-list li{
  position: relative; padding-left: 1.1rem; color: var(--ink-soft); font-size: 0.92rem;
}
.mini-list li::before{
  content: ""; position: absolute; left: 0; top: .55em;
  width: 6px; height: 6px; background: var(--accent);
}
.eleone-cta{ display: flex; flex-direction: column; align-items: flex-start; gap: .6rem; }
.hint{ font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-faint); }
.hint.center{ margin-top: 1rem; }

/* projects */
.projects-head{ display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.text-link{
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent-2);
  border-bottom: 1px solid transparent;
}
.text-link:hover{ border-color: var(--accent-2); }

.project-grid{
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem;
  margin-top: .4rem;
}
.project-card{
  position: relative;
  border: 1px solid var(--line-soft);
  padding: 1.2rem;
  display: flex; flex-direction: column; gap: .7rem;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.project-card:hover{ border-color: var(--accent); transform: translateY(-2px); }
.project-card .pname{
  font-family: var(--font-mono); font-weight: 600; font-size: 0.98rem;
  display: flex; align-items: center; gap: .4rem;
}
.project-card .pdesc{ color: var(--ink-soft); font-size: 0.88rem; flex: 1; }
.project-card .pmeta{
  display: flex; align-items: center; gap: 1rem;
  font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-faint);
}
.lang-dot{ width: 8px; height: 8px; border-radius: 50%; background: var(--accent-2); display: inline-block; margin-right: .35rem; }
.pmeta span{ display: inline-flex; align-items: center; }

.project-error, .project-empty{
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--ink-soft);
  padding: 1rem 0;
}

/* skeletons */
.skeleton{ gap: .6rem; }
.skel-line{ height: 10px; background: var(--line-faint); border-radius: 2px; animation: pulse 1.4s ease-in-out infinite; }
.skel-line.w60{ width: 60%; height: 14px; }
.skel-line.w90{ width: 90%; }
.skel-line.w40{ width: 40%; }
@keyframes pulse{ 0%,100%{ opacity: .5; } 50%{ opacity: 1; } }

/* contact */
.contact-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: .5rem; }
.contact-card{
  display: flex; align-items: center; gap: .8rem;
  border: 1px solid var(--line-soft);
  padding: 1rem 1.1rem;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.contact-card:hover{ border-color: var(--accent); transform: translateY(-2px); }
.contact-card svg{ width: 22px; height: 22px; flex-shrink: 0; color: var(--ink-soft); }
.contact-card strong{ display: block; font-family: var(--font-mono); font-size: 0.92rem; }
.contact-card em{ display: block; font-style: normal; font-size: 0.8rem; color: var(--ink-faint); }

/* footer */
.site-footer{
  max-width: var(--container);
  margin: 2rem auto 2.5rem;
  padding: 1.4rem clamp(1.25rem, 3vw, 2.25rem);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: .4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
}
.site-footer::before,.site-footer::after{ border-color: var(--line-soft); }

/* ================= RESPONSIVE ================= */
@media (max-width: 880px){
  .hero-grid{ grid-template-columns: 1fr; }
  .about-grid{ grid-template-columns: 1fr; }
  .eleone-grid{ grid-template-columns: 1fr; }
  .project-grid{ grid-template-columns: repeat(2, 1fr); }
  .contact-grid{ grid-template-columns: 1fr; }
}

@media (max-width: 680px){
  .menu-btn{ display: inline-flex; }
  .nav-links{
    position: fixed; inset: 60px 0 auto 0;
    flex-direction: column; gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line-soft);
    padding: .5rem var(--gap) 1rem;
    transform: translateY(-8px);
    opacity: 0; pointer-events: none;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  }
  .nav-links.is-open{ opacity: 1; transform: none; pointer-events: auto; }
  .nav-links a{ padding: .7rem 0; border-bottom: 1px solid var(--line-faint); width: 100%; }
  .project-grid{ grid-template-columns: 1fr; }
  .site-footer{ flex-direction: column; }
}