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

/* ── Visually hidden (accessible h1) ───────────────────────────── */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── Tokens ────────────────────────────────────────────────────── */
:root {
  --ease:  cubic-bezier(0.4, 0, 0.2, 1);
  --speed: 0.65s;
  --font:  'Poppins', sans-serif;
  --flex-active:   3;
  --flex-inactive: 0.35;
}

/* ── Base ──────────────────────────────────────────────────────── */
html, body {
  height: 100%;
  overflow: hidden;
  background: #0d0d0d;
  font-family: var(--font);
  color: #fff;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ────────────────────────────────────────────────────── */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  padding: 1.75rem 2.5rem;
  display: flex;
  align-items: center;
  background: linear-gradient(to bottom, rgba(0,0,0,0.5) 0%, transparent 100%);
  pointer-events: none;
}

.logo {
  pointer-events: auto;
  display: block;
  line-height: 0;
}

.logo img {
  height: 100px;
  width: auto;
}

/* ── Panels container ──────────────────────────────────────────── */
.panels {
  display: flex;
  height: 100vh;
  width: 100vw;
}

/* ── Individual panel ──────────────────────────────────────────── */
.panel {
  position: relative;
  flex: 1;
  overflow: hidden;
  text-decoration: none;
  color: #fff;
  cursor: pointer;
  transition: flex var(--speed) var(--ease);
  /* Thin separator */
  outline: 1px solid rgba(255,255,255,0.06);
}

/* Background image layer — inline style sets background-image directly */
.panel-bg {
  position: absolute;
  inset: -4%;
  background-size: cover;
  background-position: center;
  z-index: 0;
  transition: transform var(--speed) var(--ease);
}

.panel:hover .panel-bg {
  transform: scale(1.04);
}

/* Gradient overlay */
.panel::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    165deg,
    rgba(0,0,0,0.05) 0%,
    rgba(0,0,0,0.5)  55%,
    rgba(0,0,0,0.88) 100%
  );
  z-index: 1;
}

/* ── Flex state when sibling is hovered ────────────────────────── */
.panels:has(.panel:hover) .panel:not(:hover) {
  flex: var(--flex-inactive);
}

.panels:has(.panel:hover) .panel:hover {
  flex: var(--flex-active);
}

/* ── Panel content ─────────────────────────────────────────────── */
.panel-inner {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2.5rem 2rem;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

/* Tag — hidden until hover */
.panel-tag {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  margin-bottom: 0.65rem;
  opacity: 0;
  transform: translateY(6px);
  transition:
    opacity  0.3s var(--ease) 0.12s,
    transform 0.3s var(--ease) 0.12s;
  white-space: nowrap;
}

.panel:hover .panel-tag {
  opacity: 1;
  transform: none;
}

/* Title — always visible */
.panel-title {
  font-size: clamp(1.1rem, 2.1vw, 2.6rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  white-space: nowrap;
}

/* Description — hidden until hover */
.panel-desc {
  font-size: 0.88rem;
  font-weight: 300;
  line-height: 1.7;
  color: rgba(255,255,255,0.72);
  max-width: 30ch;
  margin-top: 0.85rem;
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity  0.3s var(--ease) 0.2s,
    transform 0.3s var(--ease) 0.2s;
}

.panel:hover .panel-desc {
  opacity: 1;
  transform: none;
}

/* Arrow CTA — hidden until hover */
.panel-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.9);
  margin-top: 1.75rem;
  opacity: 0;
  transform: translateX(-10px);
  transition:
    opacity  0.3s var(--ease) 0.28s,
    transform 0.3s var(--ease) 0.28s;
}

.panel-arrow::after {
  content: '→';
  font-size: 1.1rem;
  line-height: 1;
  transition: transform 0.2s var(--ease);
}

.panel:hover .panel-arrow {
  opacity: 1;
  transform: none;
}

.panel:hover .panel-arrow:hover::after {
  transform: translateX(4px);
}

/* External link indicator */
.panel[target="_blank"] .panel-arrow::after {
  content: '↗';
}

/* ── Mobile ────────────────────────────────────────────────────── */
@media (max-width: 700px) {
  html, body { overflow-y: auto; }

  .site-header {
    padding: 0.75rem 1.25rem;
    background: #000;
  }

  .logo img { height: 50px; }

  .panels {
    flex-direction: column;
    height: auto;
    padding-top: 74px;
  }

  .panel {
    flex: none !important;
    height: 60vw;
    min-height: 260px;
    max-height: 380px;
  }

  .panel-title { font-size: 1.6rem; white-space: normal; }

  .panel-tag,
  .panel-desc,
  .panel-arrow {
    opacity: 1;
    transform: none;
    transition: none;
  }
}