/* ============================================================
   Utsav Lamichhane — personal site theme
   Direction C · "Modern Data-Lab"
   Deep navy + coral/teal accents · Space Grotesk + Inter + JetBrains Mono
   ============================================================ */

:root {
  /* palette */
  --navy-900: #081726;
  --navy-800: #0b1f33;
  --navy-700: #0e2740;
  --navy-600: #15324f;
  --ink:      #13233a;
  --slate-700:#33445a;
  --slate-500:#5b6b7b;
  --slate-400:#7c8b9b;
  --line:     #e4e8ee;
  --line-soft:#eef1f5;
  --paper:    #f6f8fb;
  --white:    #ffffff;

  --coral:    #ff6a45;
  --coral-d:  #e2502c;
  --teal:     #14a07a;
  --teal-d:   #0d7b5d;
  --teal-chip:#5dcaa5;
  --amber:    #e8932b;

  /* type */
  --font-head: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* layout */
  --maxw: 1120px;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(11,31,51,.05), 0 8px 28px rgba(11,31,51,.06);
  --shadow-lift: 0 10px 34px rgba(11,31,51,.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--slate-700);
  background: var(--white);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--teal-d); text-decoration: none; }
a:hover { color: var(--coral-d); }

h1, h2, h3, h4 { font-family: var(--font-head); color: var(--ink); line-height: 1.15; font-weight: 600; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2.1rem, 4.5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1rem; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 84px 0; }
.section-sm { padding: 56px 0; }
.bg-paper { background: var(--paper); }
.bg-navy { background: var(--navy-800); color: #cdd8e4; }

/* eyebrow / mono label */
.eyebrow {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--coral);
  margin: 0 0 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--coral); display: inline-block; }
.bg-navy .eyebrow { color: var(--coral); }

.lead { font-size: 1.12rem; color: var(--slate-500); max-width: 60ch; }
.bg-navy .lead, .bg-navy p { color: #9fb1c4; }

/* ---------- top nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { font-family: var(--font-head); font-weight: 600; font-size: 1.12rem; color: var(--ink); letter-spacing: -.02em; display: flex; align-items: center; gap: 2px; }
.brand:hover { color: var(--ink); }
.brand .dot { color: var(--coral); }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a, .nav-trigger {
  font-size: .92rem; font-weight: 500; color: var(--slate-700);
  padding: 9px 13px; border-radius: 9px; display: inline-flex; align-items: center; gap: 5px;
  background: none; border: 0; cursor: pointer; font-family: var(--font-body);
}
.nav-links a:hover, .nav-trigger:hover { background: var(--line-soft); color: var(--ink); }
.nav-links a.active { color: var(--coral-d); }
.nav-links a.active::after { content: ""; }

/* dropdown */
.has-drop { position: relative; }
.drop {
  position: absolute; top: calc(100% + 6px); left: 0; min-width: 232px;
  background: var(--white); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow-lift); padding: 7px; list-style: none; margin: 0;
  opacity: 0; visibility: hidden; transform: translateY(-6px); transition: .16s ease;
}
.has-drop:hover .drop, .has-drop.open .drop { opacity: 1; visibility: visible; transform: translateY(0); }
.drop a { display: block; padding: 9px 12px; border-radius: 8px; font-size: .9rem; color: var(--slate-700); }
.drop a:hover { background: var(--paper); color: var(--ink); }
.caret { width: 9px; height: 9px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(45deg) translateY(-2px); opacity: .55; }

.nav-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: 9px; width: 42px; height: 38px; cursor: pointer; padding: 0; }
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); margin: 4px auto; transition: .2s; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-body); font-weight: 600; font-size: .94rem;
  padding: 12px 20px; border-radius: 11px; cursor: pointer; border: 1px solid transparent;
  transition: transform .12s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--coral); color: #2a0c03; box-shadow: 0 6px 18px rgba(255,106,69,.32); }
.btn-primary:hover { background: #ff7d5c; color: #2a0c03; }
.btn-ghost { background: transparent; color: #dbe6f1; border-color: rgba(255,255,255,.22); }
.btn-ghost:hover { background: rgba(255,255,255,.08); color: #fff; }
.btn-outline { background: var(--white); color: var(--ink); border-color: var(--line); box-shadow: var(--shadow); }
.btn-outline:hover { border-color: var(--slate-400); color: var(--ink); }
.btn .arr { font-family: var(--font-mono); }

/* ---------- hero ---------- */
.hero { position: relative; background: radial-gradient(120% 140% at 85% -10%, #14365a 0%, var(--navy-800) 45%, var(--navy-900) 100%); color: #fff; overflow: hidden; }
.hero::after { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px); background-size: 46px 46px; -webkit-mask-image: radial-gradient(120% 100% at 80% 0%, #000 30%, transparent 75%); mask-image: radial-gradient(120% 100% at 80% 0%, #000 30%, transparent 75%); pointer-events: none; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; padding: 92px 0 96px; position: relative; z-index: 1; }
.hero h1 { color: #fff; }
.hero h1 .accent { color: var(--coral); }
.hero .lead { color: #a9bccf; font-size: 1.16rem; margin-bottom: 28px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 30px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .04em; color: #bfe9d7; background: rgba(93,202,165,.12); border: 1px solid rgba(93,202,165,.26); padding: 5px 11px; border-radius: 999px; }

/* hero card / terminal */
.code-card { background: rgba(8,20,34,.72); border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius); box-shadow: var(--shadow-lift); overflow: hidden; font-family: var(--font-mono); }
.code-card .bar { display: flex; align-items: center; gap: 7px; padding: 11px 14px; border-bottom: 1px solid rgba(255,255,255,.08); }
.code-card .bar i { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.code-card .bar .fn { font-size: .74rem; color: #6f8196; margin-left: 8px; }
.code-card pre { margin: 0; padding: 18px 18px 22px; font-size: .82rem; line-height: 1.85; color: #c6d4e2; overflow-x: auto; }
.code-card .k { color: #5dcaa5; }
.code-card .s { color: #ffb38a; }
.code-card .c { color: #5b6b7b; }
.code-card .v { color: #8fb8e0; }

/* ---------- cards / grids ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); transition: transform .16s ease, box-shadow .2s ease, border-color .2s ease;
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: #d3dae3; }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--slate-500); font-size: .95rem; margin-bottom: 16px; }
.card .card-foot { margin-top: auto; }
.card-link { font-weight: 600; font-size: .9rem; color: var(--coral-d); display: inline-flex; align-items: center; gap: 6px; }
.card-link .arr { font-family: var(--font-mono); transition: transform .15s; }
.card:hover .card-link .arr { transform: translateX(3px); }

.icn { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 16px; font-family: var(--font-mono); font-weight: 600; font-size: 1.05rem; }
.icn-coral { background: #fff0eb; color: var(--coral-d); border: 1px solid #ffd9cd; }
.icn-teal { background: #e3f6ef; color: var(--teal-d); border: 1px solid #c2ead9; }
.icn-navy { background: #eaf0f7; color: var(--navy-700); border: 1px solid #d4e0ec; }
.icn-amber { background: #fdf1dd; color: #b3700f; border: 1px solid #f3dcb0; }

/* section heading block */
.sec-head { max-width: 64ch; margin-bottom: 42px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head.center .eyebrow { justify-content: center; }

/* ---------- skills ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 11px; }
.chip {
  font-family: var(--font-mono); font-size: .82rem; color: var(--slate-700);
  background: var(--white); border: 1px solid var(--line); border-radius: 999px;
  padding: 9px 16px; box-shadow: var(--shadow); transition: .15s;
  display: inline-flex; align-items: center; gap: 8px;
}
.chip:hover { transform: translateY(-2px); border-color: var(--teal); color: var(--ink); }
.chip::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--teal-chip); }
.chip.c2::before { background: var(--coral); }
.chip.c3::before { background: var(--amber); }

/* skill groups */
.skill-group { margin-bottom: 30px; }
.skill-group h3 { font-size: 1rem; color: var(--slate-500); font-family: var(--font-mono); font-weight: 500; letter-spacing: .04em; text-transform: uppercase; font-size: .78rem; margin-bottom: 14px; }

/* ---------- list / link rows ---------- */
.linklist { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--white); box-shadow: var(--shadow); }
.linklist li + li { border-top: 1px solid var(--line-soft); }
.linklist a { display: flex; align-items: center; gap: 16px; padding: 18px 22px; color: var(--ink); transition: background .15s; }
.linklist a:hover { background: var(--paper); }
.linklist .ll-ix { font-family: var(--font-mono); font-size: .82rem; color: var(--slate-400); min-width: 30px; }
.linklist .ll-title { font-weight: 600; }
.linklist .ll-sub { color: var(--slate-500); font-size: .88rem; font-weight: 400; }
.linklist .ll-arr { margin-left: auto; font-family: var(--font-mono); color: var(--coral); }

/* pipeline step cards */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step {
  position: relative; background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 20px 20px 18px; box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .2s ease, border-color .2s; display: flex; flex-direction: column; gap: 6px;
}
.step:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: #d3dae3; }
.step .num { font-family: var(--font-mono); font-size: .76rem; color: var(--coral-d); background: #fff0eb; border: 1px solid #ffd9cd; border-radius: 7px; padding: 2px 8px; align-self: flex-start; }
.step .st-title { font-family: var(--font-head); font-weight: 600; color: var(--ink); font-size: 1.02rem; }
.step .st-sub { font-size: .86rem; color: var(--slate-500); }
.step .st-links { margin-top: 10px; display: flex; gap: 14px; font-size: .82rem; font-family: var(--font-mono); }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: start; }
.field { display: flex; align-items: center; gap: 14px; padding: 16px 18px; border: 1px solid rgba(255,255,255,.12); border-radius: 12px; background: rgba(255,255,255,.03); margin-bottom: 14px; }
.field .lab { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: #6f8196; }
.field a, .field span.val { color: #eaf1f8; font-weight: 500; }
.social { display: flex; gap: 12px; flex-wrap: wrap; }
.social a { display: inline-flex; align-items: center; gap: 9px; padding: 11px 16px; border-radius: 11px; border: 1px solid rgba(255,255,255,.16); color: #dbe6f1; font-size: .9rem; font-weight: 500; }
.social a:hover { background: rgba(255,255,255,.08); color: #fff; border-color: rgba(93,202,165,.5); }

/* ---------- misc ---------- */
.callout { border: 1px solid var(--line); border-left: 3px solid var(--coral); background: var(--paper); border-radius: 10px; padding: 16px 20px; font-size: .92rem; color: var(--slate-500); }
.codebox { font-family: var(--font-mono); background: var(--navy-900); color: #d7e2ee; border-radius: 11px; padding: 14px 18px; font-size: .9rem; display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.codebox .cp { font-family: var(--font-body); font-size: .76rem; font-weight: 600; color: var(--navy-900); background: var(--teal-chip); border: 0; border-radius: 7px; padding: 6px 11px; cursor: pointer; }
.codebox .cp:hover { background: #74d6b3; }
.divider { height: 1px; background: var(--line); border: 0; margin: 0; }
.muted { color: var(--slate-400); font-size: .86rem; }
.pill-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 6px; }
.pill { font-family: var(--font-mono); font-size: .72rem; padding: 4px 10px; border-radius: 999px; background: #eaf0f7; color: var(--navy-700); border: 1px solid #d4e0ec; }

.version-list { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.version-list li { font-family: var(--font-mono); font-size: .82rem; padding: 6px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--white); color: var(--slate-500); }
.version-list li.latest { border-color: var(--teal); color: var(--teal-d); background: #e8f7f1; font-weight: 600; }

/* ---------- skill icon grid ---------- */
.skillgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(146px, 1fr)); gap: 16px; }
.skilltile {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 22px 14px 18px; text-align: center; box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .2s ease, border-color .2s;
  display: flex; flex-direction: column; align-items: center; gap: 13px;
}
.skilltile:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: #d3dae3; }
.skilltile .ic { width: 52px; height: 52px; display: grid; place-items: center; }
.skilltile img { max-width: 52px; max-height: 52px; object-fit: contain; }
.skilltile span { font-size: .85rem; font-weight: 500; color: var(--ink); line-height: 1.3; }

/* social icons */
.social a img { width: 18px; height: 18px; object-fit: contain; }
.social a img.inv { } /* github mark is dark; show on light pill */
.social-ic { width: 20px; height: 20px; object-fit: contain; vertical-align: -4px; margin-right: 8px; }

/* mbX Pro logo banner */
.logo-banner { display: flex; justify-content: center; margin: 0 0 30px; }
.logo-banner img { max-width: 360px; width: 100%; height: auto; }

/* figure */
.figure { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); background: var(--white); }
.figure img { width: 100%; height: auto; display: block; }
.figure figcaption { font-size: .82rem; color: var(--slate-500); padding: 12px 16px; border-top: 1px solid var(--line-soft); font-family: var(--font-mono); }

/* ---------- footer ---------- */
.footer { background: var(--navy-900); color: #8da0b4; padding: 56px 0 30px; }
.footer-top { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer .fbrand { font-family: var(--font-head); font-size: 1.15rem; color: #fff; font-weight: 600; margin-bottom: 8px; }
.footer-nav { display: flex; gap: 34px; flex-wrap: wrap; }
.footer-nav h4 { color: #cdd8e4; font-size: .78rem; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 12px; }
.footer-nav a { display: block; color: #8da0b4; font-size: .9rem; padding: 4px 0; }
.footer-nav a:hover { color: var(--teal-chip); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 22px; font-size: .82rem; color: #6f8196; }
.footer-bottom a { color: #8da0b4; }

/* ---------- page header (interior) ---------- */
.page-head { background: radial-gradient(130% 150% at 88% -10%, #14365a 0%, var(--navy-800) 50%, var(--navy-900) 100%); color: #fff; padding: 64px 0 58px; position: relative; overflow: hidden; }
.page-head::after { content:""; position:absolute; inset:0; background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px); background-size: 46px 46px; -webkit-mask-image: radial-gradient(120% 120% at 85% 0%, #000 25%, transparent 70%); mask-image: radial-gradient(120% 120% at 85% 0%, #000 25%, transparent 70%); }
.page-head .wrap { position: relative; z-index: 1; }
.page-head h1 { color: #fff; margin-bottom: 12px; }
.page-head p { color: #a9bccf; max-width: 62ch; margin: 0; }
.crumbs { font-family: var(--font-mono); font-size: .76rem; color: #8aa0b6; margin-bottom: 16px; }
.crumbs a { color: #aebfd0; }

/* mbX Pro brand header */
.page-head.brand { background: radial-gradient(130% 150% at 88% -10%, #ff9168 0%, var(--coral) 48%, var(--coral-d) 100%); }
.page-head.brand p { color: #ffe7df; }
.page-head.brand .crumbs { color: #ffd7c8; }
.page-head.brand .crumbs a { color: #fff; }

/* big rectangular sub-tabs */
.subtabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 0 0 44px; }
.subtab {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 24px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 6px;
  transition: transform .15s ease, box-shadow .2s ease, border-color .2s;
}
.subtab:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: #d3dae3; }
.subtab .st-k { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--slate-400); }
.subtab .st-t { font-family: var(--font-head); font-weight: 600; font-size: 1.12rem; color: var(--ink); }
.subtab .st-d { font-size: .85rem; color: var(--slate-500); }
.subtab.active { border: 2px solid var(--coral); background: #fff6f2; }
.subtab.active .st-k { color: var(--coral-d); }
@media (max-width: 760px) { .subtabs { grid-template-columns: 1fr; } }

/* ---------- responsive ---------- */
@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; padding: 64px 0 70px; }
  .hero-visual { order: -1; }
  .contact-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .section { padding: 60px 0; }
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 66px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: var(--white); border-bottom: 1px solid var(--line); padding: 12px; gap: 2px;
    box-shadow: var(--shadow-lift); display: none;
  }
  .nav-links.show { display: flex; }
  .nav-links a, .nav-trigger { width: 100%; justify-content: space-between; padding: 12px 14px; }
  .drop { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; padding: 0 0 6px 14px; min-width: 0; display: none; }
  .has-drop.open .drop { display: block; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer-top { flex-direction: column; }
}