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

:root {
  --bg:      #111113;
  --surface: #1e1e22;
  --border:  #2e2e36;
  --text:    #f0f0f2;
  --muted:   #8a8a96;
  --accent:  #d4d4d8;
  --white:   #ffffff;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Montserrat', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

body.modal-open { overflow: hidden; }

.dot-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.dot-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.dot-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 700px 500px at 20% 10%, rgba(180,180,210,0.05) 0%, transparent 70%),
    radial-gradient(ellipse 500px 400px at 80% 80%, rgba(160,160,200,0.035) 0%, transparent 70%);
}

.nav-wrap {
  position: fixed;
  top: 18px; left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  width: calc(100% - 48px);
  max-width: 900px;
}

nav {
  background: #1a1a1e;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 100px;
  padding: 10px 18px;
  display: flex; align-items: center;
  justify-content: space-between; gap: 12px;
}

.nav-logo {
  font-weight: 700; font-size: 15px;
  letter-spacing: 0.06em; color: var(--white);
  white-space: nowrap; padding: 0 6px;
}

.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }

.nav-links a {
  display: block; padding: 7px 14px; border-radius: 100px;
  font-size: 13px; font-weight: 500; color: var(--muted);
  text-decoration: none; letter-spacing: 0.03em;
  transition: color 0.18s, background 0.18s; white-space: nowrap;
}

.nav-links a:hover { color: var(--white); background: rgba(255,255,255,0.07); }

.nav-cta {
  background: var(--white) !important; color: #111 !important;
  font-weight: 600 !important; transition: opacity 0.18s !important;
}

.nav-cta:hover { opacity: 0.85; background: var(--white) !important; }

.page { position: relative; z-index: 1; padding-top: 110px; }

section { max-width: 860px; margin: 0 auto; padding: 80px 24px; }

#hero {
  min-height: 82vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; padding-top: 60px; padding-bottom: 60px;
}

h1 {
  font-size: clamp(48px,9vw,86px); font-weight: 800;
  letter-spacing: -0.03em; line-height: 1.0;
  color: var(--white); margin-bottom: 20px;
}

h1 .dim { color: rgba(255,255,255,0.22); }

.hero-sub {
  font-size: 16px; font-weight: 400; color: var(--muted);
  max-width: 400px; line-height: 1.65; margin-bottom: 40px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 100px;
  font-family: 'Montserrat', sans-serif;
  font-size: 13px; font-weight: 600; letter-spacing: 0.03em;
  cursor: pointer; border: none; text-decoration: none;
  transition: all 0.18s;
}

.btn svg { flex-shrink: 0; }

.btn-primary { background: var(--white); color: #111; }
.btn-primary:hover { opacity: 0.88; }

.btn-ghost {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1); color: var(--text);
}
.btn-ghost:hover { background: rgba(255,255,255,0.1); }

.section-label {
  font-size: 11px; font-weight: 600; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 10px;
}

h2 {
  font-size: clamp(26px,4vw,36px); font-weight: 700;
  letter-spacing: -0.025em; color: var(--white); margin-bottom: 10px;
}

.section-desc {
  font-size: 14px; color: var(--muted); line-height: 1.7;
  max-width: 520px; margin-bottom: 40px;
}

.divider { width: 100%; height: 1px; background: var(--border); margin: 0 auto; max-width: 860px; }

.download-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 20px; padding: 32px;
  display: flex; align-items: flex-start; gap: 24px;
  transition: border-color 0.2s;
}

.download-card:hover { border-color: rgba(255,255,255,0.18); }

.dl-icon {
  width: 52px; height: 52px;
  background: rgba(255,255,255,0.07); border-radius: 14px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}

.dl-info { flex: 1; }

.dl-title { font-size: 16px; font-weight: 700; color: var(--white); margin-bottom: 6px; letter-spacing: -0.01em; }

.dl-sub { font-size: 13px; color: var(--muted); margin-bottom: 16px; line-height: 1.6; }

.dl-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }

.tag {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.08);
  border-radius: 100px; padding: 4px 12px;
  font-size: 11px; font-weight: 600; color: var(--muted); letter-spacing: 0.05em;
}

.preview-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }

.preview-card {
  aspect-ratio: 16/10;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 10px;
  color: var(--muted); font-size: 12px; font-weight: 500;
  letter-spacing: 0.04em; overflow: hidden; position: relative;
  transition: border-color 0.2s, transform 0.2s;
  cursor: pointer;
}

.preview-card:hover { border-color: rgba(255,255,255,0.18); transform: translateY(-2px); }

.preview-card::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.02) 0%, transparent 60%);
}

.preview-span2 { grid-column: span 2; aspect-ratio: 32/10; }

.preview-card img {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover;
  border-radius: 16px;
}

.preview-card .card-inner {
  position: relative; z-index: 1;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 10px;
}

.lightbox-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.88);
  backdrop-filter: blur(10px);
  z-index: 998;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.22s;
  user-select: none;
}

.lightbox-overlay.open { opacity: 1; pointer-events: all; }

.lightbox-img {
  max-width: 88vw; max-height: 82vh;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
  object-fit: contain;
  display: block;
  position: relative; z-index: 1;
}

.lightbox-placeholder {
  max-width: 70vw; max-height: 70vh;
  width: 700px; aspect-ratio: 16/9;
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 14px;
  color: var(--muted); font-size: 13px; font-weight: 500;
  letter-spacing: 0.04em;
  position: relative; z-index: 1;
}

.lightbox-close {
  position: fixed; top: 20px; right: 20px;
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; z-index: 2;
  transition: background 0.15s;
  padding: 0;
}

.lightbox-close:hover { background: rgba(255,255,255,0.16); }

.changelog-list { display: flex; flex-direction: column; gap: 16px; }

.changelog-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 24px 28px;
  display: flex; gap: 20px; align-items: flex-start;
  transition: border-color 0.2s;
}

.changelog-item:hover { border-color: rgba(255,255,255,0.14); }

.cl-version {
  background: rgba(255,255,255,0.07); border-radius: 8px;
  padding: 6px 12px; font-size: 12px; font-weight: 700;
  color: var(--white); letter-spacing: 0.04em; white-space: nowrap; flex-shrink: 0;
}

.cl-content { flex: 1; }

.cl-title { font-size: 14px; font-weight: 600; color: var(--white); margin-bottom: 6px; }

.cl-body { font-size: 13px; color: var(--muted); line-height: 1.65; }

.cl-date { font-size: 11px; color: rgba(255,255,255,0.25); margin-top: 8px; font-weight: 500; }

.purchase-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 24px; padding: 48px; text-align: center;
  position: relative; overflow: hidden; transition: border-color 0.2s;
}

.purchase-card:hover { border-color: rgba(255,255,255,0.18); }

.purchase-card::before {
  content: ''; position: absolute; top: -60px; left: 50%;
  transform: translateX(-50%); width: 300px; height: 200px;
  background: radial-gradient(ellipse, rgba(255,255,255,0.04) 0%, transparent 70%);
  pointer-events: none;
}

.price-display {
  font-size: clamp(48px,8vw,72px); font-weight: 800;
  color: var(--white); letter-spacing: -0.04em;
  line-height: 1; margin: 20px 0 8px;
}

.price-period { font-size: 13px; color: var(--muted); margin-bottom: 32px; font-weight: 500; }

.perks {
  display: flex; flex-direction: column; gap: 10px;
  margin: 0 auto 36px; max-width: 320px; text-align: left;
}

.perk { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); font-weight: 500; }

.perk-check {
  width: 20px; height: 20px;
  background: rgba(255,255,255,0.08); border-radius: 50%;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}

.support-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 20px; padding: 32px;
  display: flex; align-items: center;
  justify-content: space-between; gap: 24px; flex-wrap: wrap;
  transition: border-color 0.2s;
}

.support-card:hover { border-color: rgba(255,255,255,0.14); }

.support-text h3 { font-size: 18px; font-weight: 700; color: var(--white); margin-bottom: 6px; letter-spacing: -0.015em; }

.support-text p { font-size: 13px; color: var(--muted); line-height: 1.6; }

.terms-list { display: flex; flex-direction: column; gap: 12px; }

.terms-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 24px 28px;
  display: flex; align-items: flex-start; gap: 20px;
  transition: border-color 0.2s;
}

.terms-item:hover { border-color: rgba(255,255,255,0.14); }

.terms-num {
  background: rgba(255,255,255,0.07); border-radius: 8px;
  padding: 6px 12px; font-size: 12px; font-weight: 700;
  color: var(--white); letter-spacing: 0.04em; white-space: nowrap; flex-shrink: 0;
}

.terms-content { flex: 1; }

.terms-title { font-size: 14px; font-weight: 600; color: var(--white); margin-bottom: 6px; }

.terms-body { font-size: 13px; color: var(--muted); line-height: 1.65; }

footer {
  border-top: 1px solid var(--border); padding: 32px 24px;
  text-align: center; font-size: 12px; color: rgba(255,255,255,0.2);
  letter-spacing: 0.04em; font-weight: 500; position: relative; z-index: 1;
}

.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(6px);
  z-index: 999;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s;
  user-select: none;
}

.modal-overlay.open { opacity: 1; pointer-events: all; }

.modal {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 22px; padding: 36px;
  max-width: 400px; width: calc(100% - 48px);
  transform: translateY(12px) scale(0.97);
  transition: transform 0.22s;
  position: relative;
}

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

.modal-close {
  position: absolute; top: 16px; right: 16px;
  width: 28px; height: 28px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; padding: 0;
  transition: background 0.15s;
}

.modal-close:hover { background: rgba(255,255,255,0.13); }

.modal-icon-wrap {
  width: 48px; height: 48px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}

.modal h3 { font-size: 17px; font-weight: 700; color: var(--white); margin-bottom: 8px; }

.modal p { font-size: 13px; color: var(--muted); line-height: 1.65; margin-bottom: 8px; }

.modal-url {
  display: block;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 14px; font-size: 11.5px; color: var(--accent);
  word-break: break-all; margin: 10px 0 24px;
  font-family: 'Montserrat', sans-serif; font-weight: 500;
}

.modal-actions { display: flex; gap: 10px; }

.modal-cancel {
  flex: 1; background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08); border-radius: 100px;
  padding: 11px 0; color: var(--muted);
  font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 600;
  cursor: pointer; transition: background 0.15s;
}

.modal-cancel:hover { background: rgba(255,255,255,0.1); }

.modal-confirm {
  flex: 1; background: var(--white); border: none; border-radius: 100px;
  padding: 11px 0; color: #111;
  font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 700;
  cursor: pointer; transition: opacity 0.15s;
}

.modal-confirm:hover { opacity: 0.85; }

.nav-hamburger {
  display: none;
  flex-direction: column; justify-content: center; align-items: center; gap: 5px;
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px; cursor: pointer; flex-shrink: 0;
  transition: background 0.18s;
}

.nav-hamburger:hover { background: rgba(255,255,255,0.12); }

.nav-hamburger span {
  display: block; width: 16px; height: 1.5px;
  background: var(--white); border-radius: 2px;
}

.mobile-sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}

.mobile-sidebar-overlay.open { opacity: 1; pointer-events: all; }

.mobile-sidebar {
  position: fixed; top: 0; right: 0;
  width: 260px; height: 100vh;
  background: #1a1a1e;
  border-left: 1px solid rgba(255,255,255,0.08);
  z-index: 201;
  display: flex; flex-direction: column;
  padding: 24px 20px 40px;
  gap: 4px;
  transform: translateX(100%);
  transition: transform 0.28s cubic-bezier(0.4,0,0.2,1);
}

.mobile-sidebar.open { transform: translateX(0); }

.sidebar-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px; padding: 0 4px;
}

.sidebar-logo {
  font-weight: 700; font-size: 15px;
  letter-spacing: 0.06em; color: var(--white);
}

.sidebar-close {
  width: 32px; height: 32px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; flex-shrink: 0;
  transition: background 0.15s;
}

.sidebar-close:hover { background: rgba(255,255,255,0.13); }

.mobile-sidebar a {
  display: block; padding: 12px 16px; border-radius: 12px;
  font-size: 14px; font-weight: 500; color: var(--muted);
  text-decoration: none; letter-spacing: 0.03em;
  transition: color 0.18s, background 0.18s;
}

.mobile-sidebar a:hover { color: var(--white); background: rgba(255,255,255,0.07); }

.mobile-sidebar .nav-cta {
  background: var(--white) !important; color: #111 !important;
  font-weight: 600 !important; margin-top: 8px;
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .mobile-sidebar-overlay { display: block; }

  .nav-wrap { width: calc(100% - 32px); top: 14px; }
  nav { padding: 8px 14px; border-radius: 16px; }

  .page { padding-top: 90px; }
  section { padding: 56px 20px; }

  #hero { min-height: 75vh; padding-top: 40px; padding-bottom: 40px; }
  .hero-sub { font-size: 14px; }
  .hero-actions { flex-direction: column; align-items: center; width: 100%; }
  .hero-actions .btn { width: 100%; max-width: 280px; justify-content: center; }

  .download-card { flex-direction: column; padding: 24px; }
  .dl-icon { width: 44px; height: 44px; }

  .preview-grid { grid-template-columns: 1fr; gap: 12px; }
  .preview-span2 { grid-column: span 1; aspect-ratio: 16/10; }

  .changelog-item { flex-direction: column; gap: 12px; padding: 20px; }
  .terms-item { flex-direction: column; gap: 12px; padding: 20px; }

  .purchase-card { padding: 32px 20px; }
  .perks { max-width: 100%; }

  .support-card { flex-direction: column; padding: 24px; }

  .modal { padding: 28px 20px; }
}

@media (min-width: 641px) and (max-width: 860px) {
  section { padding: 64px 32px; }
  .preview-grid { grid-template-columns: 1fr 1fr; }
  .preview-span2 { grid-column: span 2; aspect-ratio: 32/10; }
  .purchase-card { padding: 40px 32px; }
}