:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --text: #0e0e0e;
  --muted: #666666;
  --line: #d9d9d9;
  --line-strong: #121212;
  --soft: #f5f5f5;
  --shadow: rgba(0, 0, 0, 0.03);
  --radius: 22px;
  --radius-sm: 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
}

body {
  font-family: "IBM Plex Sans", "Avenir Next", "Helvetica Neue", sans-serif;
  line-height: 1.5;
}

button,
a {
  font: inherit;
}

.page-shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 40px 24px 56px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: flex-end;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.eyebrow,
.section-label,
.rail-title,
.platform-kicker {
  margin: 0;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--muted);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  font-weight: 600;
  letter-spacing: -0.03em;
}

h1 {
  margin-top: 6px;
  font-size: clamp(42px, 7vw, 72px);
  line-height: 0.95;
}

h2 {
  margin-top: 8px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.02;
}

h3 {
  font-size: 20px;
}

.header-note,
.muted,
.meta-line,
.arch-note,
.button-meta,
.note-copy {
  margin: 0;
  color: var(--muted);
}

.header-note {
  max-width: 360px;
  text-align: right;
}

.layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 28px;
  margin-top: 30px;
}

.platform-rail {
  padding: 24px 0;
}

.platform-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.platform-button,
.software-tab {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease,
    transform 160ms ease;
}

.platform-button {
  display: flex;
  width: 100%;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-radius: 999px;
}

.platform-button-main {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.platform-icon {
  width: 24px;
  height: 24px;
  flex: 0 0 24px;
}

.platform-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.platform-label {
  min-width: 0;
}

.platform-button:hover,
.software-tab:hover,
.download-button:hover,
.alt-card:hover {
  transform: translateY(-1px);
}

.platform-button.is-active,
.software-tab.is-active {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}

.platform-button.is-disabled {
  color: #a1a1a1;
  border-style: dashed;
  cursor: not-allowed;
}

.content-panel {
  min-width: 0;
}

.software-tabs-wrap {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 8px 0 22px;
}

.software-tabs {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.software-tab {
  padding: 14px 22px;
  border-radius: 999px;
}

.download-panel {
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background: var(--panel);
  box-shadow: 0 22px 40px var(--shadow);
  padding: 28px;
}

.download-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
}

.meta-block {
  min-width: 220px;
  text-align: right;
}

.recommended-slot,
.recommended-card,
.empty-card {
  margin-top: 28px;
  border-radius: var(--radius);
}

.recommended-tag {
  display: inline-block;
  margin-bottom: 16px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.recommended-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px;
  border: 1px solid var(--line-strong);
  text-decoration: none;
  color: inherit;
  transition: transform 160ms ease, background 160ms ease;
}

.recommended-card:hover {
  transform: translateY(-1px);
  background: #fcfcfc;
}

.recommended-main {
  min-width: 0;
}

.recommended-topline {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.recommended-left {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.recommended-title {
  margin: 0;
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 600;
  line-height: 1.02;
}

.recommended-description {
  margin: 0;
  color: var(--muted);
}

.recommended-right {
  display: flex;
  align-items: center;
  gap: 18px;
  flex: 0 0 auto;
}

.download-button-size {
  font-size: 17px;
  color: var(--muted);
  white-space: nowrap;
}

.download-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  font-size: 26px;
  line-height: 1;
}

.empty-card {
  border: 1px solid var(--line-strong);
  padding: 24px;
}

.arch-note {
  margin-top: 12px;
}

.alternatives-block {
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.block-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
}

.alternatives-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.alt-card {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  text-decoration: none;
  color: inherit;
  background: var(--soft);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.alt-card:hover {
  border-color: var(--line-strong);
  background: #f1f1f1;
}

.alt-title {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.alt-side {
  text-align: right;
  white-space: nowrap;
}

.direct-links {
  margin-top: 24px;
}

.direct-links a {
  color: var(--text);
}

@media (max-width: 960px) {
  .page-shell {
    padding: 28px 18px 42px;
  }

  .site-header,
  .download-header,
  .block-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-note,
  .meta-block {
    max-width: none;
    min-width: 0;
    text-align: left;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .platform-rail {
    padding: 0;
  }

  .platform-nav {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .platform-button {
    width: auto;
  }

  .alternatives-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .software-tabs-wrap {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }

  .software-tabs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .software-tab,
  .platform-button {
    width: 100%;
    justify-content: center;
    min-width: 0;
  }

  .platform-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .download-panel {
    padding: 20px;
  }

  .recommended-card,
  .empty-card {
    padding: 18px;
  }

  .recommended-card,
  .recommended-topline,
  .recommended-right {
    flex-direction: column;
    align-items: flex-start;
  }

  .alt-card {
    flex-direction: column;
  }

  .alt-side {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .platform-nav,
  .software-tabs {
    grid-template-columns: 1fr;
  }
}