/* =============================================================
   Hanumant Kulkarni — Interaction Design Portfolio
   Design system recreated from the reference layout/interaction
   language. You normally won't need to edit this file — all your
   content lives in data.js.
   ============================================================= */

/* ---- Design tokens --------------------------------------- */
:root {
  /* durations & easings */
  --dur-fast: 0.2s;
  --dur-base: 0.4s;
  --dur-slow: 0.5s;
  --ease-out-sharp: cubic-bezier(0.2, 0, 0, 1);
  --ease-out-back: cubic-bezier(0.2, 0, 0, 1.4);

  /* accent (shared) */
  --c-accent: oklch(66% 0.182 258);
  --c-green: #99ff46; /* hero accent (from Figma) */
  /* hero gradient — charcoal fading to the page background (light: to white) */
  --hero-gradient: linear-gradient(
    180deg,
    #444444 0%, #616161 31%, #6b6b6b 38%,
    #787878 48%, #8a8a8a 55%, var(--c-bg) 100%
  );

  /* light palette */
  --c-bg: oklch(98% 0.004 260);
  --c-text: oklch(24% 0.045 275);
  --c-muted: oklch(53% 0.07 270);
  --c-border: oklch(30% 0.04 275 / 0.12);
  --c-card: oklch(94% 0.006 260);
  --c-mark: oklch(94% 0.006 260); /* faint footer watermark */

  /* card geometry */
  --card-radius: 2rem; /* 34px */
  --btn-inset: 0.375rem;

  color-scheme: light;
}

html.dark {
  --c-bg: oklch(23% 0.062 262);
  --c-text: oklch(95% 0.02 268);
  --c-muted: oklch(78% 0.045 270);
  --c-border: oklch(90% 0.03 270 / 0.16);
  --c-card: oklch(28% 0.035 272);
  --c-mark: oklch(26.5% 0.058 262); /* faint footer watermark, a whisper above bg */
  /* cleaner dark hero: charcoal fading straight into the dark page bg */
  --hero-gradient: linear-gradient(180deg, #3c3c40 0%, #34343a 42%, var(--c-bg) 100%);
  color-scheme: dark;
}

/* ---- Reset ------------------------------------------------ */
* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  /* Reference uses a 17px root; the whole type + spacing scale derives from it. */
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: "Public Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 0.9375rem; /* 15.94px */
  line-height: 1.75;
  letter-spacing: normal;
  transition: background var(--dur-base) ease, color var(--dur-base) ease;
  overflow-x: hidden;
}

::selection { background: var(--c-accent); color: #fff; }

a { color: inherit; text-decoration: none; }

/* ---- Page frame ------------------------------------------ */
.main {
  max-width: 1440px;
  margin: 0 auto;
  padding: 4rem 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 5rem;
}
@media (min-width: 640px) { .main { padding: 5rem 100px 0; gap: 8rem; } }

/* =============================================================
   HERO  —  full-width gradient band (from Figma)
   Charcoal at the top fading into the page background so it flows
   seamlessly into the project feed below (which stays theme-aware).
   ============================================================= */
.hero-band {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  background: var(--hero-gradient);
  font-family: "Poppins", "Public Sans", ui-sans-serif, system-ui, sans-serif;
}
.hero-band__inner {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 22vh 1.5rem 6rem;
}
@media (min-width: 640px) { .hero-band__inner { padding: 22vh 100px 6rem; } }

.hero {
  position: relative;
  max-width: 528px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.hero__top { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }

.hero__title {
  font-family: inherit;
  font-size: 28px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: normal;
  color: var(--c-green);
}
.hero__role {
  font-family: inherit;
  font-size: 20px;
  font-weight: 400;
  line-height: 1.4;
  color: #ebebeb;
}

.hero__p {
  font-family: inherit;
  font-size: 22px;
  font-weight: 400;
  line-height: 1.35;
  color: #ebebeb;
}
.hero__p--first { margin-top: 2.25rem; }
.hero__p + .hero__p { margin-top: 1.25rem; }

/* ---- Hero links (two columns) ---------------------------- */
.hero-links {
  display: flex;
  gap: 3.25rem;
  margin-top: 2.5rem;
}
.hero-links__col { display: flex; flex-direction: column; gap: 0.5rem; }

.hero-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: inherit;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.4;
  color: #ffffff;
  width: max-content;
  transition: opacity var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out-back);
}
.hero-link:hover { transform: translateY(-2px); }
.hero-link__icon { display: inline-flex; width: 21px; height: 21px; flex-shrink: 0; }
.hero-link__icon svg { width: 100%; height: 100%; display: block; }
.hero-link--accent { color: var(--c-green); }
.hero-link--accent .hero-link__label {
  text-decoration: underline;
  text-decoration-thickness: from-font;
  text-underline-offset: 2px;
}
.hero-link:hover .hero-link__label { opacity: 0.85; }

/* ---- Two-dot theme switch (from Figma) ------------------- */
.theme-dots {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 6px 4px;
  min-height: 44px;
}
.theme-dots__dot {
  width: 15px;
  height: 15px;
  border-radius: 9999px;
  transition: box-shadow var(--dur-fast) ease, background var(--dur-fast) ease;
}
.theme-dots__dot--dark { background: #2b2b2b; }
.theme-dots__dot--light { background: #cfcfcf; }
/* the dot for the active theme gets a light ring */
html.dark .theme-dots__dot--dark { box-shadow: 0 0 0 2px #f2f2f2, 0 0 0 4px rgba(0, 0, 0, 0.18); }
html:not(.dark) .theme-dots__dot--light { box-shadow: 0 0 0 2px #ffffff, 0 0 0 4px rgba(0, 0, 0, 0.28); }
.theme-dots:hover .theme-dots__dot { opacity: 0.85; }

/* =============================================================
   INDEX  /  project feed
   ============================================================= */
.feed { padding-bottom: 8rem; }

.feed__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
@media (min-width: 1024px) { .feed__head { margin-bottom: 3rem; } }

.feed__label {
  font-size: 0.875rem; /* 14.875px */
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

.feed__tabs {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem; /* 14.875px */
  font-weight: 500;
}
.feed__tab {
  position: relative;
  color: var(--c-muted);
  background: none;
  border: 0;
  padding: 0 0 4px;
  cursor: pointer;
  font: inherit;
  transition: color var(--dur-fast) ease;
}
.feed__tab:hover { color: var(--c-text); }
.feed__tab.is-active { color: var(--c-text); }
.feed__underline {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1.5px;
  width: 0;
  border-radius: 1px;
  background: var(--c-text);
  pointer-events: none;
  transition: transform 0.35s var(--ease-out-sharp), width 0.35s var(--ease-out-sharp);
}

/* masonry: 1 col mobile, 2 cols from md */
.feed__grid { display: flex; gap: 34px; }
.feed__col { flex: 1; display: flex; flex-direction: column; gap: 34px; min-width: 0; }
.feed__col--right { display: none; }
@media (min-width: 768px) { .feed__col--right { display: flex; } }

/* ---- Project card ---------------------------------------- */
.group-wrap { will-change: transform, opacity, filter; }

.card {
  position: relative;
  display: block;
  border-radius: var(--card-radius);
  overflow: hidden;
  background: var(--c-card);
  cursor: default;
  transition: box-shadow 0.3s ease,
              transform var(--dur-base) cubic-bezier(0.4, 0, 0.2, 1);
}
.group:hover .card { transform: translateY(-4px); transition: box-shadow 0.3s ease, transform 0.35s var(--ease-out-back); }

.card__imgwrap {
  position: relative;
  width: 100%;
  overflow: hidden;
}
.card__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9) brightness(0.97);
  transition: transform 0.25s ease-out, filter 0.3s ease-out;
  will-change: transform;
}
.group:hover .card__img { transform: scale(1.02); filter: saturate(1.1) brightness(1.02); }

/* generated placeholder look */
.card__ph {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 1.4rem;
  background:
    radial-gradient(130% 90% at 20% 0%, oklch(66% 0.11 258 / 0.22), transparent 60%),
    var(--ph-tone, oklch(40% 0.05 262));
}
.card__ph-index {
  font-size: clamp(2.4rem, 7vw, 3.4rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: oklch(98% 0.02 260 / 0.85);
  line-height: 1;
}

/* pinned badge */
.pin-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  z-index: 3;
  width: 30px;
  height: 30px;
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-accent);
  color: var(--c-bg);
  box-shadow: 0 2px 10px -2px oklch(66% 0.182 258 / 0.6);
}
.pin-badge svg { width: 14px; height: 14px; }

/* hover pill button (desktop) */
.card__btnzone {
  position: absolute;
  left: var(--btn-inset);
  right: var(--btn-inset);
  bottom: var(--btn-inset);
  z-index: 4;
  pointer-events: none;
}
.group:hover .card__btnzone { pointer-events: auto; cursor: pointer; }

.card__btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 1.25rem;
  border-radius: calc(var(--card-radius) - var(--btn-inset));
  background: var(--c-accent);
  color: #fff;
  border: 1px solid var(--c-accent);
  opacity: 0;
  transform: translateY(12px) scale(0.98);
  filter: blur(3px);
  transition: transform var(--dur-base) var(--ease-out-sharp),
              opacity 0.15s ease,
              filter 0.3s var(--ease-out-sharp),
              background var(--dur-fast) ease,
              color var(--dur-fast) ease;
}
.group:hover .card__btn {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}
.card__btnzone:hover .card__btn {
  background: var(--c-bg);
  color: var(--c-text);
  border-color: var(--c-border);
  transform: translateY(-3px);
  box-shadow: 0 6px 16px -2px oklch(66% 0.182 258 / 0.35);
  transition: transform 0.3s var(--ease-out-sharp), background var(--dur-fast) ease, color var(--dur-fast) ease;
}
.card__btnzone:active .card__btn { transform: translateY(1px) scale(0.97); }

.card__btn-label {
  font-size: 0.9375rem; /* 15.94px */
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.card__btn-arrow {
  flex-shrink: 0;
  display: flex;
  transition: transform var(--dur-fast) var(--ease-out-sharp);
}
.card__btnzone:hover .card__btn-arrow { transform: translateX(3px); }
.card__btn-arrow svg { width: 14px; height: 14px; }

/* caption (mobile / touch only) */
.card__caption {
  display: none;
  margin-top: 0.625rem;
  padding: 0 0.25rem;
  font-size: 0.8125rem; /* 13.8px */
  line-height: 1.4;
  color: var(--c-muted);
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}
.card__caption-tag { font-size: 0.75rem; opacity: 0.75; flex-shrink: 0; white-space: nowrap; text-align: right; }

@media (hover: none), (pointer: coarse) {
  .card__caption { display: flex; }
  .card__btnzone { display: none; }
}

/* =============================================================
   DARK-MODE TOGGLE
   ============================================================= */
.toggle {
  min-height: 44px;
  min-width: 52px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0;
}
.toggle__track {
  position: relative;
  display: flex;
  align-items: center;
  width: 52px;
  height: 28px;
  border-radius: 9999px;
  border: 1.5px solid var(--c-border);
  background: transparent;
  transition: border-color var(--dur-fast) ease, background var(--dur-base) ease;
}
.toggle:hover .toggle__track { border-color: var(--c-accent); }
html.dark .toggle:hover .toggle__track { background: oklch(66% 0.182 258 / 0.1); }

.toggle__thumb {
  position: absolute;
  top: 50%;
  left: 4px;
  width: 20px;
  height: 20px;
  border-radius: 9999px;
  background: var(--c-muted);
  color: var(--c-bg);
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 3px oklch(0% 0 0 / 0.2);
  transition: transform var(--dur-base) var(--ease-out-back),
              background var(--dur-base) ease;
}
.toggle:active .toggle__thumb { width: 23px; }
html.dark .toggle__thumb { transform: translate(24px, -50%); background: var(--c-accent); }

/* sun / moon icons crossfade + rotate inside the thumb */
.toggle__icon {
  position: absolute;
  width: 13px;
  height: 13px;
  transition: opacity var(--dur-base) ease, transform var(--dur-base) var(--ease-out-back);
}
.toggle__icon--sun { opacity: 1; transform: rotate(0deg) scale(1); }
.toggle__icon--moon { opacity: 0; transform: rotate(-90deg) scale(0.4); }
html.dark .toggle__icon--sun { opacity: 0; transform: rotate(90deg) scale(0.4); }
html.dark .toggle__icon--moon { opacity: 1; transform: rotate(0deg) scale(1); }

/* =============================================================
   FOOTER
   ============================================================= */
.footer { position: relative; }
.footer__frame {
  position: relative;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem 6rem;
  overflow: hidden;
}
@media (min-width: 640px) { .footer__frame { padding: 0 100px 6.5rem; } }

/* tagline: location left, quip right */
.footer__tagline {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  font-size: 0.8125rem;
  color: var(--c-muted);
}
.footer__tagline span { white-space: nowrap; }
@media (max-width: 520px) { .footer__tagline span.footer__quip { display: none; } }

/* centered social links */
.footer__socials {
  position: relative;
  z-index: 1;
  list-style: none;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.625rem;
  text-align: left;
  font-size: 0.9375rem;
  line-height: 1.4;
  width: 420px;
  max-width: 100%;
  margin-inline: auto;
}
@media (max-width: 639px) { .footer__socials { width: 274px; } }
@media (min-width: 900px) {
  .footer__socials { flex-direction: row; align-items: center; justify-content: center; gap: 3rem; text-align: center; width: auto; }
}
.footer__socials a, .footer__top {
  color: var(--c-muted);
  display: inline-block;
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out-back), color var(--dur-fast) ease;
}
.footer__socials a:hover, .footer__top:hover { transform: translateY(-3px); color: var(--c-text); }

/* giant faint wordmark */
.footer__mark {
  position: absolute;
  bottom: -0.24em;
  left: 0;
  right: 0;
  margin: 0;
  font-weight: 600;
  font-size: clamp(72px, 17vw, 250px);
  line-height: 0.85;
  letter-spacing: -0.04em;
  color: var(--c-mark);
  text-align: center;
  white-space: nowrap;
  user-select: none;
  pointer-events: none;
  transition: transform 0.5s var(--ease-out-sharp);
}

/* =============================================================
   ENTRANCE ANIMATIONS
   ============================================================= */
.reveal { opacity: 0; transform: translateY(20px) scale(0.985); }
.reveal.in {
  animation: entrance-cascade var(--dur-base) var(--ease-out-back) both;
  animation-delay: var(--delay, 0s);
}
@keyframes entrance-cascade {
  0%   { opacity: 0; transform: translateY(20px) scale(0.97); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

/* cards rise + de-blur from their column side */
.group-wrap.rise { opacity: 0; }
.group-wrap.rise.in { animation: card-blur-decay 0.9s var(--ease-out-sharp) both; animation-delay: var(--delay, 0s); }
.group-wrap.rise.in .card { animation: card-rise 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) both; animation-delay: var(--delay, 0s); }
@keyframes card-rise {
  0%   { opacity: 0; transform: translateY(90px) scale(1.08); }
  100% { opacity: 1; transform: none; }
}
@keyframes card-blur-decay {
  0%   { opacity: 0; filter: blur(10px); }
  30%  { opacity: 1; }
  100% { opacity: 1; filter: blur(0); }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
  .reveal, .group-wrap.rise { opacity: 1 !important; transform: none !important; }
}