:root {
  --bg: #05080f;
  --bg-2: #0a1220;
  --ink: #e7edf6;
  --ink-dim: #8fa0bb;
  --accent: #4ad3ff;
  --accent-warm: #ffd36a;
  --accent-pink: #ff6ea8;
  --line: rgba(74, 211, 255, 0.35);
  --card: rgba(16, 25, 44, 0.85);
  --card-border: rgba(74, 211, 255, 0.25);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.55);
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --serif: 'Cormorant Garamond', 'Iowan Old Style', 'Palatino', Georgia, serif;
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  background:
    linear-gradient(rgba(5, 8, 15, 0.82), rgba(5, 8, 15, 0.9)),
    url('images/aerith.jpg') center center / cover no-repeat fixed,
    radial-gradient(ellipse at top, #0d1a33 0%, var(--bg) 55%, #020308 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 70% 60%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 40% 80%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 85% 15%, rgba(255,255,255,0.45), transparent),
    radial-gradient(1px 1px at 10% 70%, rgba(255,255,255,0.35), transparent);
  background-size: 600px 600px;
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}

/* ===== HERO ===== */

.hero {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 7rem 1.5rem 4rem;
  max-width: 900px;
  margin: 0 auto;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}

.hero h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(3rem, 9vw, 6.5rem);
  letter-spacing: 0.02em;
  margin: 0 0 1.5rem;
  line-height: 1;
}

.hero h1 .vii {
  color: var(--accent-warm);
  font-style: italic;
  text-shadow: 0 0 30px rgba(255, 211, 106, 0.4);
}

.tagline {
  font-size: 1.15rem;
  color: var(--ink-dim);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.anniversary {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--card-border);
  border-radius: 999px;
  background: rgba(74, 211, 255, 0.06);
  color: var(--ink);
}

.anniversary strong {
  color: var(--accent-pink);
}

/* ===== FILTERS ===== */

.filters {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem;
  backdrop-filter: blur(12px);
  background: rgba(5, 8, 15, 0.75);
  border-bottom: 1px solid var(--card-border);
}

.filter {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: transparent;
  color: var(--ink-dim);
  border: 1px solid transparent;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.25s ease;
}

.filter:hover {
  color: var(--ink);
  border-color: var(--card-border);
}

.filter.active {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(74, 211, 255, 0.4);
}

/* ===== TIMELINE ===== */

.timeline {
  position: relative;
  max-width: 1100px;
  margin: 6rem auto;
  padding: 2rem 1.5rem;
  z-index: 1;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg,
    transparent 0%,
    var(--line) 8%,
    var(--line) 92%,
    transparent 100%);
  transform: translateX(-50%);
}

.entry {
  position: relative;
  width: 50%;
  padding: 1.5rem 3rem;
  box-sizing: border-box;
}

.entry.left  { left: 0;  text-align: right; }
.entry.right { left: 50%; text-align: left; }

.marker {
  position: absolute;
  top: 2.5rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(74, 211, 255, 0.1),
              0 0 20px rgba(74, 211, 255, 0.6);
  z-index: 2;
}

.entry.left  .marker { right: -8px; }
.entry.right .marker { left: -8px; }

.entry.landmark .marker {
  background: var(--accent-warm);
  border-color: var(--accent-warm);
  box-shadow: 0 0 0 4px rgba(255, 211, 106, 0.15),
              0 0 30px rgba(255, 211, 106, 0.8);
  width: 20px;
  height: 20px;
  top: 2.3rem;
}

.entry.left.landmark  .marker { right: -10px; }
.entry.right.landmark .marker { left: -10px; }

.entry.future .marker {
  background: var(--bg);
  border-color: var(--accent-pink);
  box-shadow: 0 0 0 4px rgba(255, 110, 168, 0.15),
              0 0 20px rgba(255, 110, 168, 0.6);
}

/* ===== CARDS ===== */

.card {
  display: inline-block;
  text-align: left;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 1.75rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
}

.entry.landmark .card {
  border-color: rgba(255, 211, 106, 0.4);
  background: linear-gradient(135deg,
    rgba(22, 32, 56, 0.9),
    rgba(28, 22, 12, 0.85));
}

.entry.future .card {
  border-style: dashed;
  border-color: rgba(255, 110, 168, 0.4);
}

.card time {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.entry.landmark .card time { color: var(--accent-warm); }
.entry.future   .card time { color: var(--accent-pink); }

.card h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.8rem;
  margin: 0 0 0.75rem;
  line-height: 1.15;
}

.card p {
  margin: 0 0 1rem;
  color: var(--ink);
  font-size: 0.97rem;
}

.card p:last-child { margin-bottom: 0; }

.card em { color: var(--accent-warm); font-style: italic; }

/* ===== IMAGE SLOTS ===== */

.img-slot {
  margin: 1.25rem 0 0;
  border-radius: 10px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.img-slot img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 280px;
  object-fit: cover;
}

.img-slot figcaption {
  display: none;
  padding: 0.75rem 1rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
  text-align: center;
}

.img-slot.empty img { display: none; }
.img-slot.empty {
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-style: dashed;
}
.img-slot.empty figcaption { display: block; }

/* ===== FOOTER ===== */

footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 3rem 1.5rem 4rem;
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

/* ===== RESPONSIVE ===== */

@media (max-width: 800px) {
  .hero { padding: 4.5rem 1.25rem 2.5rem; }

  .timeline { margin: 2rem auto; padding: 1rem; }

  .timeline::before {
    left: 20px;
    transform: none;
  }

  .entry,
  .entry.left,
  .entry.right {
    width: 100%;
    left: 0;
    text-align: left;
    padding: 1rem 0 1rem 3rem;
  }

  .entry.left .marker,
  .entry.right .marker {
    left: 12px;
    right: auto;
  }
  .entry.left.landmark .marker,
  .entry.right.landmark .marker {
    left: 10px;
  }

  .card h2 { font-size: 1.45rem; }
}