/* =================================================================
   Eidenz's personal site
   Theme: "Full Sky / Harpy" sky gradients, drifting clouds,
   airy glass cards, periwinkle/iris accent pulled from the avatar.
   Day + Night (twilight) themes. Zero build step, vanilla everything.
   ================================================================= */

/* ---------- design tokens : DAY ---------- */
:root,
[data-theme="day"] {
  --sky-top:   #9fcdf0;
  --sky-mid:   #c9e3f6;
  --sky-low:   #eef4fc;
  --sky-floor: #f4f1fd;

  --ink:       #27314f;
  --ink-soft:  #586289;
  --ink-faint: #8a93b3;

  --accent:    #6d61e6;   /* iris / periwinkle (the eyes) */
  --accent-ink:#5448d6;
  --accent-2:  #38aed4;   /* sky-teal (the mountains) */
  --accent-3:  #f1a585;   /* warm peach (the hair) */

  --glass:        rgba(255, 255, 255, 0.58);
  --glass-strong: rgba(255, 255, 255, 0.74);
  --glass-border: rgba(255, 255, 255, 0.85);
  --glass-edge:   rgba(120, 150, 220, 0.16);
  --tag-bg:       rgba(109, 97, 230, 0.10);
  --tag-ink:      #5448d6;

  --shadow-sm: 0 2px 10px rgba(40, 60, 130, 0.08);
  --shadow-md: 0 14px 40px rgba(45, 65, 140, 0.14);
  --shadow-lg: 0 26px 70px rgba(45, 65, 140, 0.20);

  --cloud-op: 0.9;
  --star-op: 0;
  --moon-op: 0;

  color-scheme: light;
}

/* ---------- design tokens : NIGHT (twilight) ---------- */
[data-theme="night"] {
  --sky-top:   #070d27;
  --sky-mid:   #111d47;
  --sky-low:   #1a2a5b;
  --sky-floor: #1f2c63;

  --ink:       #eaeffb;
  --ink-soft:  #aeb8da;
  --ink-faint: #7d88b1;

  --accent:    #a99dff;
  --accent-ink:#c4bbff;
  --accent-2:  #5fd0ee;
  --accent-3:  #f6bd9f;

  --glass:        rgba(28, 39, 80, 0.46);
  --glass-strong: rgba(33, 46, 92, 0.66);
  --glass-border: rgba(170, 188, 255, 0.18);
  --glass-edge:   rgba(150, 170, 255, 0.10);
  --tag-bg:       rgba(169, 157, 255, 0.14);
  --tag-ink:      #c4bbff;

  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.30);
  --shadow-md: 0 16px 44px rgba(0, 0, 0, 0.42);
  --shadow-lg: 0 28px 74px rgba(0, 0, 0, 0.55);

  --cloud-op: 0;
  --star-op: 1;
  --moon-op: 1;

  color-scheme: dark;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: "Nunito", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  line-height: 1.65;
  background: var(--sky-floor);
  overflow-x: hidden;
  transition: color .4s ease;
}

h1, h2, h3, .nav__brand, .btn, .filter, .stat__num {
  font-family: "Quicksand", "Nunito", system-ui, sans-serif;
}

a { color: var(--accent-ink); text-decoration: none; }
img { display: block; max-width: 100%; }
::selection { background: var(--accent); color: #fff; }

/* =================================================================
   ATMOSPHERE
   ================================================================= */
.sky {
  position: fixed; inset: 0; z-index: -3;
  background: linear-gradient(180deg,
    var(--sky-top)   0%,
    var(--sky-mid)   30%,
    var(--sky-low)   62%,
    var(--sky-floor) 100%);
  transition: background .6s ease;
}

/* ---------- fixed harpy-sky film (always-there background) ---------- */
.skyfilm {
  position: fixed; inset: 0; z-index: -2; overflow: hidden;
  background: url("assets/projects/sky-poster.jpg") center 26% / cover no-repeat;
}
.skyfilm video {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: center 26%;
  transform: scale(1.05);
  filter: blur(5px) saturate(120%);
  opacity: .72;
}
.skyfilm::after {       /* gentle legibility wash so glass panels stay readable */
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,.16), rgba(255,255,255,.10));
}
[data-theme="night"] .skyfilm { filter: brightness(.66); }
[data-theme="night"] .skyfilm video { opacity: .52; }
[data-theme="night"] .skyfilm::after {
  background: linear-gradient(180deg, rgba(8,12,32,.42), rgba(8,12,32,.5));
}

/* clouds (day) */
.clouds { position: absolute; inset: 0; opacity: var(--cloud-op); transition: opacity .6s ease; }
.cloud {
  position: absolute;
  background: radial-gradient(closest-side, rgba(255,255,255,.95), rgba(255,255,255,.55) 70%, transparent);
  border-radius: 50%;
  filter: blur(6px);
  will-change: transform;
}
.cloud--1 { top: 12%; left: -20%; width: 360px; height: 120px; animation: drift 90s linear infinite; }
.cloud--2 { top: 26%; left: -30%; width: 240px; height: 90px;  opacity:.8; animation: drift 70s linear infinite 6s; }
.cloud--3 { top: 8%;  left: -25%; width: 480px; height: 150px; opacity:.7; animation: drift 120s linear infinite 12s; }
.cloud--4 { top: 40%; left: -20%; width: 300px; height: 100px; opacity:.55; animation: drift 100s linear infinite 3s; }
@keyframes drift { to { transform: translateX(140vw); } }

/* stars (night) */
.stars {
  position: absolute; inset: 0; opacity: var(--star-op); transition: opacity .6s ease;
  background-image:
    radial-gradient(1.4px 1.4px at 12% 18%, #fff, transparent),
    radial-gradient(1.6px 1.6px at 28% 42%, #fff, transparent),
    radial-gradient(1.2px 1.2px at 44% 12%, #dfe6ff, transparent),
    radial-gradient(1.8px 1.8px at 62% 30%, #fff, transparent),
    radial-gradient(1.3px 1.3px at 76% 16%, #cfe0ff, transparent),
    radial-gradient(1.5px 1.5px at 88% 38%, #fff, transparent),
    radial-gradient(1.2px 1.2px at 18% 60%, #fff, transparent),
    radial-gradient(1.6px 1.6px at 52% 66%, #e6ecff, transparent),
    radial-gradient(1.3px 1.3px at 82% 58%, #fff, transparent),
    radial-gradient(1.1px 1.1px at 34% 78%, #fff, transparent),
    radial-gradient(1.5px 1.5px at 68% 84%, #dfe6ff, transparent);
  animation: twinkle 6s ease-in-out infinite alternate;
}
@keyframes twinkle { from { opacity: calc(var(--star-op) * .55); } to { opacity: var(--star-op); } }

.moon {
  position: absolute; top: 9%; right: 11%;
  width: 96px; height: 96px; border-radius: 50%;
  opacity: var(--moon-op); transition: opacity .6s ease;
  background: radial-gradient(circle at 35% 35%, #fdfcf5, #e8ecf8 60%, #c9d2ec);
  box-shadow: 0 0 50px 14px rgba(220, 228, 255, .55), inset -10px -8px 0 rgba(190,200,230,.35);
}

/* =================================================================
   NAV
   ================================================================= */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 1rem;
  padding: .7rem clamp(1rem, 4vw, 2.4rem);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: var(--glass);
  border-bottom: 1px solid var(--glass-edge);
}
.nav__brand {
  display: flex; align-items: center; gap: .5rem;
  font-weight: 700; font-size: 1.2rem; color: var(--ink);
  margin-right: auto;
}
.nav__feather { width: 24px; height: 24px; color: var(--accent); transform: rotate(-8deg); }
.nav__links { display: flex; gap: clamp(.6rem, 2vw, 1.6rem); }
.nav__links a {
  color: var(--ink-soft); font-weight: 700; font-size: .98rem;
  padding: .35rem .2rem; position: relative; transition: color .2s ease;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: var(--accent); border-radius: 2px; transition: width .25s ease;
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { width: 100%; }

.theme-toggle {
  display: grid; place-items: center;
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--glass-strong);
  color: var(--accent); cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease;
}
.theme-toggle:hover { transform: translateY(-2px) rotate(-12deg); box-shadow: var(--shadow-md); }
.theme-toggle svg { width: 22px; height: 22px; }
.theme-toggle__moon { display: none; }
[data-theme="night"] .theme-toggle__sun { display: none; }
[data-theme="night"] .theme-toggle__moon { display: block; }

/* =================================================================
   HERO
   ================================================================= */
.hero {
  position: relative; z-index: 1;            /* sit above the fixed sky film */
  min-height: 92vh;
  display: grid; place-items: center;
  text-align: center;
  padding: 5rem 1.2rem 6rem;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0; z-index: -1;
  background-size: cover; background-position: center 35%;
  /* fade the banner out at the bottom so the fixed film shows through and the reveal is seamless */
  -webkit-mask-image: linear-gradient(180deg, #000 66%, transparent 100%);
          mask-image: linear-gradient(180deg, #000 66%, transparent 100%);
}
.hero__bg-img {
  width: 100%; height: 100%; object-fit: cover; object-position: center 35%;
  opacity: 0; transition: opacity .8s ease;
}
.hero__bg-img.is-loaded { opacity: 1; }
/* veil for text legibility + theme tint */
.hero__veil {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(120% 90% at 50% 8%, transparent 36%, rgba(244,241,253,.18) 100%),
    linear-gradient(180deg, rgba(20,30,70,.12) 0%, rgba(20,30,70,.04) 45%, transparent 100%);
}
[data-theme="night"] .hero__veil {
  background:
    linear-gradient(180deg, rgba(7,13,39,.55) 0%, rgba(7,13,39,.30) 45%, transparent 100%);
}
[data-theme="night"] .hero__bg-img { opacity: 0; }   /* set to .is-loaded via JS; dim below */
[data-theme="night"] .hero__bg-img.is-loaded { opacity: .42; }

.hero__inner { max-width: 660px; }
.hero__avatar {
  position: relative; width: 160px; height: 160px; margin: 0 auto 1.4rem;
}
.hero__avatar img {
  width: 160px; height: 160px; border-radius: 50%; object-fit: cover;
  border: 4px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
}
.hero__avatar-ring {
  position: absolute; inset: -10px; border-radius: 50%;
  border: 2px dashed rgba(255,255,255,.6);
  animation: spin 26s linear infinite;
}
[data-theme="night"] .hero__avatar-ring { border-color: rgba(169,157,255,.4); }
@keyframes spin { to { transform: rotate(360deg); } }

.hero__hello {
  font-size: 1.05rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: #fff; text-shadow: 0 2px 14px rgba(20,30,70,.45);
}
[data-theme="night"] .hero__hello { color: var(--accent-2); text-shadow: none; }
.hero__name {
  font-size: clamp(3rem, 11vw, 5.6rem); font-weight: 700; line-height: 1;
  color: #fff; letter-spacing: -.01em;
  text-shadow: 0 6px 30px rgba(20,30,70,.45);
  margin: .1rem 0 .3rem;
}
[data-theme="night"] .hero__name { color: var(--ink); text-shadow: 0 0 40px rgba(169,157,255,.4); }
.hero__tagline {
  font-size: clamp(1.25rem, 3.4vw, 1.75rem); font-weight: 700; color: #fff;
  text-shadow: 0 2px 16px rgba(20,30,70,.5); font-family: "Quicksand", sans-serif;
}
[data-theme="night"] .hero__tagline { color: var(--ink); text-shadow: none; }
.hero__sub {
  margin-top: .5rem; font-size: 1.05rem; font-weight: 700; color: rgba(255,255,255,.92);
  text-shadow: 0 2px 12px rgba(20,30,70,.5);
}
[data-theme="night"] .hero__sub { color: var(--ink-soft); text-shadow: none; }
.hero__cta { margin-top: 1.8rem; display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }

.hero__scroll {
  position: absolute; bottom: 1.4rem; left: 50%; transform: translateX(-50%);
  width: 44px; height: 44px; display: grid; place-items: center; color: #fff;
  animation: bob 2.2s ease-in-out infinite;
}
[data-theme="night"] .hero__scroll { color: var(--ink-soft); }
.hero__scroll svg { width: 28px; height: 28px; }
@keyframes bob { 0%,100% { transform: translate(-50%,0); } 50% { transform: translate(-50%,8px); } }

/* =================================================================
   BUTTONS
   ================================================================= */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .7rem 1.4rem; border-radius: 999px;
  font-weight: 700; font-size: 1rem; cursor: pointer; border: none;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn svg { width: 20px; height: 20px; }
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; box-shadow: 0 10px 26px rgba(109,97,230,.4);
}
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 16px 34px rgba(109,97,230,.5); }
.btn--ghost {
  background: var(--glass-strong); color: var(--ink);
  border: 1px solid var(--glass-border); box-shadow: var(--shadow-sm);
}
.btn--ghost:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

/* =================================================================
   SHARED : panels, section titles
   ================================================================= */
.panel {
  background: var(--glass);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid var(--glass-border);
  border-radius: 28px;
  box-shadow: var(--shadow-md);
}
.section__title {
  font-size: clamp(1.7rem, 4.5vw, 2.5rem); font-weight: 700; line-height: 1.15;
  color: var(--ink); margin-bottom: 1rem;
}
.section__kicker {
  display: block; font-family: "Nunito", sans-serif;
  font-size: .82rem; font-weight: 700; letter-spacing: .22em; text-transform: uppercase;
  color: var(--accent); margin-bottom: .4rem;
}

/* =================================================================
   ABOUT
   ================================================================= */
.about { padding: clamp(3rem, 8vw, 6rem) clamp(1rem, 5vw, 2rem) 1rem; }
.about__panel { max-width: 880px; margin: 0 auto; padding: clamp(1.6rem, 5vw, 3rem); }
.about__body p { color: var(--ink-soft); font-size: 1.08rem; margin-bottom: 1rem; }
.about__body strong { color: var(--ink); }

.chips { list-style: none; display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1.3rem; }
.chips li {
  font-size: .9rem; font-weight: 700; color: var(--tag-ink);
  background: var(--tag-bg); padding: .35rem .85rem; border-radius: 999px;
  border: 1px solid var(--glass-edge);
}

.about__stats {
  display: flex; flex-wrap: wrap; gap: 1.5rem; margin-top: 2rem;
  padding-top: 1.6rem; border-top: 1px solid var(--glass-edge);
}
.stat { display: flex; flex-direction: column; }
.stat__num { font-size: 2.2rem; font-weight: 700; color: var(--accent); line-height: 1; }
.stat__label { font-size: .85rem; font-weight: 700; color: var(--ink-faint); text-transform: uppercase; letter-spacing: .08em; }

/* =================================================================
   PROJECTS
   ================================================================= */
/* the harpy sky film shows through behind the cards (global fixed layer) */
.projects {
  position: relative;
  padding: clamp(3.5rem, 8vw, 6rem) clamp(1rem, 5vw, 2.5rem) clamp(4rem, 9vw, 7rem);
}
.projects__head, .grid { max-width: 1200px; margin-left: auto; margin-right: auto; }
.projects__head { text-align: center; margin-bottom: 2.4rem; }
.projects__head .section__title { display: inline-block; }
.projects__lead { color: var(--ink-soft); font-size: 1.05rem; max-width: 540px; margin: .2rem auto 1.6rem; }

.filters { display: flex; flex-wrap: wrap; gap: .55rem; justify-content: center; }
.filter {
  font-size: .92rem; font-weight: 700; color: var(--ink-soft); cursor: pointer;
  background: var(--glass-strong); border: 1px solid var(--glass-border);
  padding: .5rem 1.05rem; border-radius: 999px;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, color .2s ease, background .2s ease, box-shadow .2s ease;
}
.filter:hover { transform: translateY(-2px); color: var(--ink); }
.filter.is-active {
  color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent; box-shadow: 0 10px 22px rgba(109,97,230,.34);
}

.grid {
  display: grid; gap: 1.3rem;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.card {
  position: relative; display: flex; flex-direction: column;
  background: var(--glass);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform .28s cubic-bezier(.22,1,.36,1), box-shadow .28s ease, border-color .28s ease;
}
.card__inner { display: flex; flex-direction: column; flex: 1; padding: 1.4rem 1.5rem 1.3rem; }

/* folder-style cover */
.card__cover {
  position: relative; aspect-ratio: 16 / 9; overflow: hidden;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-bottom: 1px solid var(--glass-edge);
}
.card__cover img { width: 100%; height: 100%; object-fit: cover; object-position: top center; transition: transform .5s cubic-bezier(.22,1,.36,1); }
.card:hover .card__cover img { transform: scale(1.06); }
.card__chip {
  position: absolute; left: .8rem; bottom: .8rem;
  display: grid; place-items: center; width: 42px; height: 42px;
  font-size: 1.35rem; border-radius: 13px;
  background: var(--glass-strong); border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px) saturate(150%); -webkit-backdrop-filter: blur(10px) saturate(150%);
  box-shadow: var(--shadow-sm);
}
.card--cover .card__top { margin-bottom: .55rem; }
.card::before {        /* soft top sheen */
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  opacity: 0; transition: opacity .28s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--glass-border); }
.card:hover::before { opacity: 1; }
.card--cover::before { display: none; }   /* cover provides its own top accent */

.card--featured {
  grid-column: span 2;
  background: linear-gradient(135deg, var(--glass-strong), var(--glass));
  border-color: rgba(109,97,230,.35);
}
.card--featured::before { opacity: 1; }

.card__top { display: flex; align-items: flex-start; gap: .8rem; margin-bottom: .7rem; }
.card__icon {
  flex: none; display: grid; place-items: center;
  width: 50px; height: 50px; border-radius: 15px; font-size: 1.6rem;
  background: var(--tag-bg); border: 1px solid var(--glass-edge);
}
.card__headings { min-width: 0; flex: 1; }
.card__name {
  font-size: 1.25rem; font-weight: 700; color: var(--ink);
  display: flex; align-items: center; gap: .5rem; flex-wrap: wrap;
}
.card--featured .card__name { font-size: 1.5rem; }
.card__cat { font-size: .8rem; font-weight: 700; color: var(--accent); letter-spacing: .04em; }

.badge {
  display: inline-flex; align-items: center; gap: .25rem;
  font-size: .74rem; font-weight: 700; padding: .12rem .5rem; border-radius: 999px;
  vertical-align: middle;
}
.badge svg { width: 13px; height: 13px; }
.badge--star { color: #b8860b; background: rgba(240, 190, 60, .18); border: 1px solid rgba(240,190,60,.3); }
[data-theme="night"] .badge--star { color: #ffd86b; }
.badge--featured { color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.badge--private {
  color: var(--ink-soft); background: var(--glass-strong);
  border: 1px solid var(--glass-border);
}

.card__desc { color: var(--ink-soft); font-size: .98rem; flex: 1; margin-bottom: 1rem; }

.card__tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1.1rem; }
.card__tags span {
  font-size: .76rem; font-weight: 700; color: var(--tag-ink);
  background: var(--tag-bg); padding: .2rem .6rem; border-radius: 7px;
}

.card__foot { margin-top: auto; }
.card__link {
  display: inline-flex; align-items: center; gap: .4rem;
  font-weight: 700; font-size: .92rem; color: var(--accent-ink);
  padding: .45rem .9rem; border-radius: 999px;
  background: var(--tag-bg); border: 1px solid var(--glass-edge);
  transition: transform .2s ease, background .2s ease, color .2s ease;
}
.card__link svg { width: 16px; height: 16px; }
.card__link:hover { transform: translateX(2px); background: var(--accent); color: #fff; }
.card__selfhost {
  display: inline-flex; align-items: center; gap: .4rem;
  font-weight: 700; font-size: .88rem; color: var(--ink-faint);
}
.card__selfhost svg { width: 15px; height: 15px; }

.projects__more { text-align: center; margin-top: 2.4rem; }

/* card filter transition */
.card.is-hidden { display: none; }

/* =================================================================
   FOOTER
   ================================================================= */
.footer {
  text-align: center;
  padding: clamp(3rem, 8vw, 5rem) clamp(1rem, 5vw, 2rem) 2rem;
  max-width: 760px; margin: 0 auto;
}
.footer__panel { padding: clamp(1.8rem, 5vw, 3rem); }
.footer__lead { color: var(--ink-soft); font-size: 1.05rem; max-width: 480px; margin: 0 auto 1.6rem; }
.footer__links { display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }
.footer__note { margin-top: 2rem; font-size: .88rem; font-weight: 700; color: var(--ink-faint); }

/* =================================================================
   SCROLL REVEAL
   ================================================================= */
/* Only hide for reveal when JS is present to bring it back */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s cubic-bezier(.22,1,.36,1); }
.js .reveal.is-in { opacity: 1; transform: none; }

/* =================================================================
   RESPONSIVE
   ================================================================= */
@media (max-width: 720px) {
  .nav__links { display: none; }
  .card--featured { grid-column: span 1; }
  .card--featured .card__name { font-size: 1.25rem; }
  .hero { min-height: 88vh; }
}

@media (max-width: 380px) {
  .hero__cta { flex-direction: column; align-items: stretch; }
}

/* =================================================================
   ACCESSIBILITY
   ================================================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; }
}