/* ─────────────────────────────────────────────
   Slack Dark Mode Design System
   ───────────────────────────────────────────── */

/* Slack brand colours */
:root {
  --blue:    #36C5F0;
  --green:   #2EB67D;
  --pink:    #E01E5A;
  --yellow:  #ECB22E;

  /* Slack dark surfaces */
  --bg-base:    #1A1D21;
  --bg-raised:  #222529;
  --bg-float:   #2C2D30;
  --bg-hover:   #383A40;
  --border:     #383A40;
  --border-dim: #2C2D30;

  /* Text */
  --text-primary:   #D1D2D3;
  --text-secondary: #9B9EA4;
  --text-muted:     #696A6B;

  /* Misc */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ─────────────────────────────────────────────
   HERO
   ───────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 2rem;
  /* Subtle blue-tinted dot grid */
  background-image: radial-gradient(circle, rgba(54,197,240,0.06) 1px, transparent 1px);
  background-size: 30px 30px;
}

/* Ambient colour orbs */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.18;
  pointer-events: none;
  animation: drift 12s ease-in-out infinite alternate;
}
.orb-blue   { width: 520px; height: 520px; background: var(--blue);   top: -120px; left: -100px; animation-delay: 0s; }
.orb-green  { width: 380px; height: 380px; background: var(--green);  top: 60px;  right: -80px;  animation-delay: -3s; }
.orb-pink   { width: 300px; height: 300px; background: var(--pink);   bottom: 80px; left: 10%;   animation-delay: -6s; }
.orb-yellow { width: 260px; height: 260px; background: var(--yellow); bottom: 40px; right: 15%;  animation-delay: -9s; }

@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, 20px) scale(1.08); }
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

/* Logo */
.logo-wrap {
  background: #111214;
  border-radius: 28px;
  padding: 18px;
  box-shadow:
    0 0 0 1px var(--border),
    0 20px 60px rgba(0,0,0,0.6);
  animation: logoFloat 6s ease-in-out infinite;
}
@keyframes logoFloat {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}
.slack-logo { width: 80px; height: 80px; display: block; }

/* Hero text */
.hero-title {
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: #fff;
}
.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 420px;
}

/* Scroll CTA */
.scroll-cta {
  margin-top: 0.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 2px solid var(--border);
  color: var(--text-secondary);
  text-decoration: none;
  transition: border-color var(--transition), color var(--transition), transform var(--transition);
  animation: bounce 2.4s ease-in-out infinite;
}
.scroll-cta svg { width: 22px; height: 22px; }
.scroll-cta:hover { border-color: var(--blue); color: var(--blue); transform: translateY(3px); }
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(8px); }
}

/* ─────────────────────────────────────────────
   GALLERIES SECTION
   ───────────────────────────────────────────── */
.galleries {
  position: relative;
  max-width: 1920px;
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
  display: flex;
  flex-direction: column;
  gap: 0;
  overflow: hidden;
  /* Subtle yellow-tinted diagonal lines */
  background-image: repeating-linear-gradient(
    -45deg,
    transparent 0,
    transparent 28px,
    rgba(236,178,46,0.035) 28px,
    rgba(236,178,46,0.035) 29px
  );
}

/* Expanding galleries orbs */
.orb-g-pink   { width: 500px; height: 500px; background: var(--pink);   top: -100px; left: -80px;   animation-delay: -2s; }
.orb-g-yellow { width: 380px; height: 380px; background: var(--yellow); top: 0;      right: -100px; animation-delay: -7s; }
.orb-g-blue   { width: 300px; height: 300px; background: var(--blue);   bottom: 5%;  right: 10%;    animation-delay: -5s; }
.orb-g-green  { width: 240px; height: 240px; background: var(--green);  bottom: -60px; left: 20%;   animation-delay: -10s; }

/* ── Gallery block ── */
.gallery-block {
  position: relative;
  z-index: 1;
  padding: 3.5rem 0;
}

/* ── Gallery header ── */
.gallery-header {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 560px;
  /* scroll-reveal initial state */
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.gallery-header.revealed {
  opacity: 1;
  transform: translateY(0);
}
.gallery-header--alt { align-items: flex-end; text-align: right; margin-left: auto; }

/* Chip */
.gallery-chip {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: rgba(54,197,240,0.12);
  color: var(--blue);
  border: 1px solid rgba(54,197,240,0.25);
  width: fit-content;
}
.chip--green {
  background: rgba(46,182,125,0.12);
  color: var(--green);
  border-color: rgba(46,182,125,0.25);
}

/* Titles */
.gallery-title {
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #fff;
  line-height: 1.1;
}
.gallery-desc {
  font-size: 1rem;
  color: var(--text-secondary);
}


/* Toggle button */
.toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  background: var(--blue);
  color: #1A1D21;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  width: fit-content;
  margin-top: 0.5rem;
}
.toggle-btn:hover {
  background: #5cd0f5;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(54,197,240,0.35);
}
.toggle-btn[aria-expanded="true"] {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.toggle-btn[aria-expanded="true"] .btn-icon { transform: rotate(90deg); }
.toggle-btn--green { background: var(--green); }
.toggle-btn--green:hover {
  background: #3fd491;
  box-shadow: 0 8px 24px rgba(46,182,125,0.35);
}
.toggle-btn--green[aria-expanded="true"] {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  transition: transform var(--transition);
}
.btn-icon svg { width: 18px; height: 18px; }

/* ── Player ── */
.player-wrap {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.55s cubic-bezier(0.4, 0, 0.2, 1);
  margin-top: 0;
}
.player-wrap.open {
  grid-template-rows: 1fr;
  margin-top: 2rem;
}
.player-wrap[aria-hidden="true"] .player-inner { visibility: hidden; }
.player-wrap.open .player-inner            { visibility: visible; }

.player-inner { overflow: hidden; }

.vimeo-ratio {
  position: relative;
  width: min(1920px, 100%);
  padding-bottom: 56.25%;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
  box-shadow:
    0 0 0 1px var(--border),
    0 32px 80px rgba(0,0,0,0.7);
}
.vimeo-ratio iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* ── Section divider ── */
.section-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
}
.div-line { flex: 1; height: 1px; background: var(--border-dim); }
.div-dot  {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg-float);
  border: 2px solid var(--border);
  flex-shrink: 0;
}

/* ─────────────────────────────────────────────
   FEATURED GALLERIES (middle section)
   ───────────────────────────────────────────── */
.folders-section {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 5rem 1.5rem 7rem;
  border-bottom: 1px solid var(--border-dim);
  overflow: hidden;
  /* Subtle green-tinted cross grid */
  background-image:
    linear-gradient(rgba(46,182,125,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46,182,125,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* Featured galleries orbs */
.orb-f-green  { width: 560px; height: 560px; background: var(--green);  top: -140px; right: -120px; animation-delay: -1s; }
.orb-f-blue   { width: 360px; height: 360px; background: var(--blue);   bottom: -80px; left: -80px; animation-delay: -6s; }
.orb-f-pink   { width: 280px; height: 280px; background: var(--pink);   top: 55%; left: 5%;         animation-delay: -4s; }
.orb-f-yellow { width: 220px; height: 220px; background: var(--yellow); bottom: 15%; right: 8%;     animation-delay: -9s; }

.folders-inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.folders-inner.revealed {
  opacity: 1;
  transform: translateY(0);
}

.folders-heading {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 2.5rem;
  letter-spacing: -0.02em;
  text-align: center;
}

.folders-grid {
  display: flex;
  gap: 1.75rem;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
}

.folder-card {
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  width: 260px;
}

.folder-thumb {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}
.folder-thumb--blue  { background: var(--blue); }
.folder-thumb--green { background: var(--green); }

.folder-card:hover .folder-thumb {
  transform: translateY(-6px) scale(1.03);
  filter: brightness(1.08);
}
.folder-card:hover .folder-thumb--blue {
  box-shadow: 0 20px 48px rgba(54, 197, 240, 0.5);
}
.folder-card:hover .folder-thumb--green {
  box-shadow: 0 20px 48px rgba(46, 182, 125, 0.5);
}

.folder-icon {
  width: 80px;
  height: 80px;
  fill: var(--bg-base);
  opacity: 0.85;
  display: block;
}

.folder-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  text-align: center;
  transition: color var(--transition);
}
.folder-card:hover .folder-name { color: #fff; }

/* Section-to-section scroll arrow — pinned to bottom of folders section */
.section-cta {
  position: absolute;
  z-index: 2;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--border);
  color: var(--text-secondary);
  text-decoration: none;
  transition: border-color var(--transition), color var(--transition);
  animation: sectionBounce 2.4s ease-in-out infinite;
}
.section-cta svg { width: 20px; height: 20px; }
.section-cta:hover {
  border-color: var(--blue);
  color: var(--blue);
}
@keyframes sectionBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* Up-arrow variant */
.section-cta--up {
  bottom: auto;
  top: 1.5rem;
  animation-name: sectionBounceUp;
}
.section-cta--up:hover { color: var(--blue); border-color: var(--blue); }
@keyframes sectionBounceUp {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(-8px); }
}

/* ─────────────────────────────────────────────
   FOOTER
   ───────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border-dim);
  padding: 2.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.footer-logo { width: 32px; height: 32px; }

/* ─────────────────────────────────────────────
   SCROLL PROGRESS BAR
   ───────────────────────────────────────────── */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--blue), var(--green), var(--pink), var(--yellow));
  z-index: 1000;
  transition: width 0.1s linear;
}

/* ─────────────────────────────────────────────
   NAV DOT (optional sticky nav)
   ───────────────────────────────────────────── */
.nav-dots {
  position: fixed;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  z-index: 100;
}
.nav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  padding: 0;
}
.nav-dot.active { background: var(--blue); transform: scale(1.5); }
.nav-dot:nth-child(2).active { background: var(--green); }

/* ─────────────────────────────────────────────
   MOBILE
   ───────────────────────────────────────────── */
@media (max-width: 640px) {
  .gallery-header--alt { align-items: flex-start; text-align: left; }
  .nav-dots { display: none; }
  .orb { opacity: 0.12; }
}