/* ============================================================
   Shubham Kumar Gupta — "Professionally Nosy"
   Playful UX research portfolio — design system
   ============================================================ */

:root {
  /* --- Color --- */
  --paper:    #F3EEE3;   /* warm cream base */
  --paper-2:  #ECE5D6;   /* sunken */
  --card:     #FBF8F1;   /* raised */
  --ink:      #1C1815;   /* warm near-black */
  --ink-soft: #6A6056;   /* muted */
  --ink-faint:#A39A8C;
  --line:     #DBD3C4;
  --line-2:   #C9BFAC;

  --tang:     #FF4A1C;   /* electric tangerine — primary energy */
  --tang:     #FF4A1C;   /* electric tangerine — primary energy (tweakable) */
  --tang-ink: color-mix(in srgb, var(--tang) 82%, #160500);  /* text-on-paper safe variant */
  --marker:   #DCFB4B;   /* highlighter chartreuse */
  --cobalt:   #1F2BFF;   /* rare interactive pop */
  --ok:       #1C9C58;

  /* contrast-safety tokens (themes may override) */
  --on-marker: #1C1815;  /* text/elements sitting ON the chartreuse marker */
  --marker-fg: var(--marker); /* the chartreuse used AS foreground text */
  --on-accent: #fff;     /* text sitting on an accent fill */

  /* --- Type --- */
  --display: "Space Grotesk", -apple-system, system-ui, sans-serif;
  --body:    "Hanken Grotesk", -apple-system, system-ui, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* --- Space --- */
  --s1: 8px; --s2: 16px; --s3: 24px; --s4: 32px; --s5: 48px;
  --s6: 64px; --s7: 96px; --s8: 140px;

  --wrap: 1200px;
  --gutter: clamp(20px, 5vw, 64px);
  --r: 14px;
  --r-lg: 24px;

  --ease: cubic-bezier(0.34, 1.2, 0.46, 1);   /* slight overshoot, playful */
  --ease-soft: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 18px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* subtle paper grain */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
}

::selection { background: var(--marker); color: var(--on-marker); }

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 0.98;
  margin: 0;
  text-wrap: balance;
}
p { margin: 0; text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---------- Layout ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding-inline: var(--gutter); position: relative; z-index: 1; }
.section { padding-block: var(--s8); position: relative; }
@media (max-width: 760px) { .section { padding-block: var(--s7); } body { font-size: 17px; } }

/* ---------- Type helpers ---------- */
.kicker {
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.02em;
  text-transform: uppercase; color: var(--ink-soft);
  display: inline-flex; align-items: center; gap: 10px;
}
.kicker::before {
  content: ""; width: 22px; height: 22px; border-radius: 50%;
  background: var(--tang); flex-shrink: 0;
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--tang) 18%, transparent);
}
.kicker.no-dot::before { display: none; }

.display-xl { font-size: clamp(44px, 7vw, 104px); }
.display-l  { font-size: clamp(34px, 5vw, 72px); }
.display-m  { font-size: clamp(27px, 3.4vw, 46px); }
.lead { font-size: clamp(17px, 1.7vw, 21px); line-height: 1.5; color: var(--ink-soft); font-weight: 400; }
.mono { font-family: var(--mono); }
.tang { color: var(--tang-ink); }

/* ---------- Highlighter marker ---------- */
.mark { position: relative; white-space: nowrap; }
.mark > span { position: relative; z-index: 1; transition: color 220ms var(--ease-soft); }
.mark.lit > span, .mark.instant > span { color: var(--on-marker); }
.mark::after {
  content: ""; position: absolute; left: -0.08em; right: -0.08em; bottom: 0.04em;
  height: 0.42em; background: var(--marker); z-index: 0;
  transform: scaleX(0); transform-origin: left center;
  transition: transform 560ms var(--ease-soft);
  border-radius: 2px;
}
.mark.lit::after { transform: scaleX(1); }
.mark.instant::after { transform: scaleX(1); transition: none; }

/* circle-scribble annotation */
.scribble { position: relative; display: inline-block; }
.scribble::after {
  content: ""; position: absolute; inset: -14% -10% -18% -10%;
  border: 2.5px solid var(--tang); border-radius: 60% 40% 55% 45% / 50% 55% 45% 50%;
  transform: rotate(-3deg) scale(1.04); opacity: 0;
  transition: opacity 400ms var(--ease-soft), transform 500ms var(--ease);
}
.scribble.lit::after { opacity: 1; transform: rotate(-2deg) scale(1); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-width: 190px;
  font-family: var(--body); font-size: 17px; font-weight: 600;
  padding: 15px 26px; border-radius: 100px; border: 2px solid var(--ink);
  cursor: pointer; background: var(--ink); color: var(--paper);
  transition: transform 200ms var(--ease), background 160ms, color 160ms, box-shadow 200ms var(--ease);
  position: relative; will-change: transform;
}
.btn:hover { background: var(--tang); border-color: var(--tang); color: var(--on-accent); box-shadow: 0 10px 0 -2px color-mix(in srgb, var(--tang) 35%, transparent); transform: translateY(-2px); }
.btn:active { transform: translateY(1px); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); box-shadow: 0 10px 0 -2px color-mix(in srgb, var(--ink) 22%, transparent); }
.btn .arr { transition: transform 220ms var(--ease); }
.btn:hover .arr { transform: translate(3px, -3px); }

/* ---------- Focus ---------- */
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--cobalt); outline-offset: 3px; border-radius: 6px;
}

/* ---------- Chips / tags ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.01em;
  padding: 7px 13px; border: 1.5px solid var(--line-2); border-radius: 100px;
  color: var(--ink-soft); background: var(--card);
}

/* ---------- Reveal ---------- */
.rv-hidden { opacity: 0; transform: translateY(26px); }
.rv-in { opacity: 1; transform: none; transition: opacity 680ms var(--ease-soft), transform 760ms var(--ease); }
@media (prefers-reduced-motion: reduce) { .rv-hidden, .rv-in { opacity: 1; transform: none; } }

/* ---------- Misc ---------- */
.sticker {
  display: inline-block; font-family: var(--mono); font-size: 13px; font-weight: 700;
  padding: 6px 12px; background: var(--marker); color: var(--on-marker);
  border: 2px solid var(--ink); border-radius: 8px;
  transform: rotate(-2.5deg);
  box-shadow: 3px 3px 0 var(--ink);
}
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; z-index: 200; background: var(--ink); color: var(--paper); padding: 12px 18px; border-radius: 8px; }