:root {
  --bg: #000000;
  --bg-elev: #0c0c0c;
  --bg-elev-2: #161616;
  --border: #1f1f1f;
  --border-strong: #2a2a2a;
  --text: #ffffff;
  --text-dim: #9a9a9a;
  --text-faint: #6b6b6b;
  --accent: #4ade80;
  --accent-strong: #22c55e;
  --accent-soft: rgba(74, 222, 128, 0.12);
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-pixel: "VT323", "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

.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;
}

/* ---------- Landing page ---------- */

body.landing {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background:
    radial-gradient(800px 500px at 50% 30%, rgba(74, 222, 128, 0.06), transparent 60%),
    #000;
}

.landing-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
}

.landing-title {
  margin: 0 0 24px;
  font-size: clamp(34px, 6vw, 68px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  background: linear-gradient(180deg, #ffffff 0%, #c9c9c9 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.version-trigger {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--text-dim);
  font-family: inherit;
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
  box-shadow: 0 0 0 0 var(--accent-soft);
}

.version-trigger:hover {
  color: var(--text);
  background: var(--bg-elev-2);
  border-color: var(--accent);
  box-shadow: 0 0 0 6px var(--accent-soft);
}

.version-trigger:active {
  transform: translateY(1px);
}

.version-trigger:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.version-trigger-arrow {
  font-size: 14px;
  color: var(--accent);
}

.landing-footer {
  padding: 22px 20px;
  text-align: center;
  color: var(--text-faint);
  font-size: 13px;
  border-top: 1px solid var(--border);
}

.landing-footer p {
  margin: 0;
}

/* ---------- Modal ---------- */

.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}

.modal[hidden] {
  display: none;
}

.modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
}

.modal-card {
  position: relative;
  width: 100%;
  max-width: 460px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  background: linear-gradient(180deg, #0e0e0e 0%, #060606 100%);
  border: 1px solid var(--border-strong);
  border-radius: 18px;
  padding: 28px 24px 24px;
  box-shadow: var(--shadow);
  transform: translateY(8px) scale(0.98);
  transition: transform 0.22s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.modal.is-open .modal-card {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
  border-radius: 10px;
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.modal-close:hover {
  color: var(--text);
  background: var(--bg-elev-2);
  border-color: var(--border-strong);
}

.modal-eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-family: var(--font-pixel);
  font-size: 18px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.modal-title {
  margin: 0 0 20px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.version-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.version-option {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
  transition: transform 0.12s ease, border-color 0.18s ease, background 0.18s ease;
}

.version-option:hover {
  transform: translateX(2px);
  background: var(--bg-elev-2);
  border-color: var(--accent);
  text-decoration: none;
}

.version-num {
  font-family: var(--font-pixel);
  font-size: 26px;
  letter-spacing: 0.04em;
  color: var(--text);
}

.version-meta {
  color: var(--text-faint);
  font-size: 13px;
}

.version-arrow {
  color: var(--accent);
  font-size: 18px;
  transition: transform 0.18s ease;
}

.version-option:hover .version-arrow {
  transform: translateX(4px);
}

/* ---------- Version page ---------- */

body.version-page {
  background:
    radial-gradient(900px 500px at 50% -10%, rgba(74, 222, 128, 0.06), transparent 60%),
    #000;
}

.vp-header {
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 30;
}

.vp-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
}

.vp-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 500;
}

.vp-back:hover {
  color: var(--text);
  text-decoration: none;
}

.vp-switch {
  appearance: none;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.vp-switch:hover {
  border-color: var(--accent);
  background: var(--bg-elev-2);
}

.vp-hero {
  padding: 64px 0 32px;
  text-align: center;
}

.vp-eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-family: var(--font-pixel);
  font-size: 22px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.vp-title {
  margin: 0 0 14px;
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.vp-lede {
  max-width: 620px;
  margin: 0 auto;
  color: var(--text-dim);
  font-size: 17px;
}

.vp-packs {
  padding: 24px 0 80px;
}

/* Pack grid */
.pack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

.pack-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.pack-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}

.pack-thumb {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #1a1a1a, #050505);
  background-size: cover;
  background-position: center;
  position: relative;
  image-rendering: pixelated;
}

.pack-thumb .res-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(0, 0, 0, 0.75);
  color: #fff;
  font-family: var(--font-pixel);
  font-size: 16px;
  padding: 2px 8px;
  border-radius: 6px;
  letter-spacing: 0.05em;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.pack-body {
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.pack-title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
}

.pack-author {
  margin: 0;
  color: var(--text-faint);
  font-size: 13px;
}

.pack-desc {
  margin: 4px 0 0;
  color: var(--text-dim);
  font-size: 14px;
  flex: 1;
}

.pack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.pack-tag {
  font-size: 12px;
  color: var(--text-dim);
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
}

.pack-actions {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}

.pack-actions .btn {
  height: 38px;
  flex: 1;
  font-size: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.05s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  text-decoration: none;
  font-family: inherit;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #061008;
  border-color: var(--accent-strong);
}

.btn-primary:hover {
  background: var(--accent-strong);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-ghost:hover {
  border-color: #3b3b3b;
  background: var(--bg-elev-2);
}

.empty-state {
  text-align: center;
  color: var(--text-dim);
  padding: 60px 20px;
  background: var(--bg-elev);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
}

.empty-state p {
  margin: 0 0 6px;
}

.empty-state .empty-sub {
  color: var(--text-faint);
  font-size: 14px;
}