:root {
  --bg: #f7f8f5;
  --panel: #ffffff;
  --ink: #161a1d;
  --muted: #626a70;
  --line: #dfe4df;
  --accent: #177a67;
  --accent-dark: #0f5f51;
  --disabled: #eef1ee;
  --shadow: 0 18px 50px rgba(22, 26, 29, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: inherit;
}

.layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 32px 28px;
  border-right: 1px solid var(--line);
  background: #fbfcfa;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 42px;
  text-decoration: none;
}

.brand img {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

.brand strong {
  display: block;
  font-size: 18px;
  letter-spacing: 0;
}

.brand span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: grid;
  gap: 8px;
}

.nav a {
  padding: 10px 12px;
  border-radius: 6px;
  color: var(--muted);
  text-decoration: none;
}

.nav a.active,
.nav a:hover {
  color: var(--ink);
  background: #eef3ee;
}

.content {
  max-width: 1080px;
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 54px 56px 64px;
}

.eyebrow {
  margin: 0 0 24px;
  color: var(--accent-dark);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 700;
  max-width: 780px;
  line-height: 1.05;
  letter-spacing: 0;
}

.eyebrow span {
  font-size: 0.62em;
  font-weight: 650;
  opacity: 0.72;
}

h2 {
  margin: 0 0 14px;
  font-size: 24px;
  letter-spacing: 0;
}

p {
  max-width: 760px;
  margin: 0 0 18px;
  color: var(--muted);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 42px;
  align-items: center;
  padding-bottom: 42px;
  border-bottom: 1px solid var(--line);
}

.hero-media {
  min-height: 250px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(145deg, #ffffff, #edf2ef);
  box-shadow: var(--shadow);
}

.hero-media img {
  width: 150px;
  height: 150px;
  object-fit: contain;
}

.section {
  padding: 38px 0;
  border-bottom: 1px solid var(--line);
}

.empty-section {
  min-height: 220px;
}

.about-section {
  padding-bottom: 42px;
  border-bottom: 1px solid var(--line);
}

.about-lead {
  margin-bottom: 30px;
  font-size: 18px;
  color: var(--ink);
}

.about-list {
  max-width: 860px;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.about-item {
  display: grid;
  grid-template-columns: minmax(190px, 0.42fr) minmax(0, 1fr);
  gap: 28px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.about-item h2 {
  margin: 0;
  font-size: 18px;
}

.about-item p {
  margin: 0;
}

.about-contact {
  margin: 24px 0 0;
  color: var(--muted);
}

.about-contact a {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration: none;
}

.about-contact a:hover {
  text-decoration: underline;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.button:hover {
  background: var(--accent-dark);
}

.cta {
  width: fit-content;
  max-width: 100%;
  margin: auto auto 0;
  padding: 21px 96px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.cta .button {
  min-width: 180px;
}

.release-group {
  margin-top: 18px;
}

.release-group:first-of-type {
  margin-top: 0;
}

.release-group p {
  margin-bottom: 4px;
}

.notice {
  max-width: 820px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-top: 26px;
}

.plan {
  min-height: 220px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--disabled);
  color: #7b8388;
  opacity: 0.58;
}

.plan.active {
  background: var(--panel);
  color: var(--ink);
  opacity: 1;
  border-color: rgba(23, 122, 103, 0.55);
  box-shadow: var(--shadow);
}

.plan h2 {
  margin: 0 0 18px;
  font-size: 20px;
  line-height: 1.35;
  min-height: 54px;
}

.plan strong {
  display: block;
  margin: 0 0 10px;
  font-size: 30px;
}

.plan ul {
  margin: 18px 0 0;
  padding-left: 0;
  color: var(--muted);
  list-style: none;
}

.plan li {
  position: relative;
  padding-left: 18px;
}

.plan.active li {
  white-space: nowrap;
}

.plan li + li {
  margin-top: 8px;
}

.plan li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 7px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  background: var(--panel);
  transform: translateY(-50%);
}

.plan.active li::before {
  background: var(--accent);
}

.changelog {
  max-width: 820px;
  display: grid;
  gap: 24px;
}

.changelog-year {
  margin: 0;
  color: var(--ink);
  font-size: 22px;
  font-weight: 800;
  opacity: 0.62;
}

.release {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.release time {
  color: var(--muted);
  font-weight: 700;
}

.release h2 {
  margin-bottom: 8px;
}

.release ul {
  margin: 8px 0 0;
  padding-left: 0;
  color: var(--muted);
  list-style: none;
}

.release li {
  position: relative;
  padding-left: 20px;
}

.release li + li {
  margin-top: 8px;
}

.release li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  transform: translateY(-50%);
}

.release-group.added li::before {
  background: var(--accent);
}

.release-group.fixed li::before {
  width: 9px;
  height: 9px;
  border: 1px solid #7a6551;
  background: #f4ede2;
}

.contact-form {
  max-width: 760px;
  display: grid;
  gap: 14px;
}

textarea {
  width: 100%;
  min-height: 260px;
  resize: vertical;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  font: inherit;
}

textarea:focus {
  outline: 2px solid rgba(23, 122, 103, 0.22);
  border-color: var(--accent);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-items: center;
}

.form-row .button {
  grid-column: 2;
  width: 100%;
}

.status {
  grid-column: 1 / -1;
  grid-row: 2;
  min-height: 24px;
  margin: 0;
  font-size: 14px;
}

.status[data-state="success"] {
  color: var(--accent-dark);
}

.status[data-state="error"] {
  color: #a53d2a;
}

button:disabled {
  cursor: wait;
  opacity: 0.65;
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    padding: 22px;
  }

  .brand {
    margin-bottom: 18px;
  }

  .nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .content {
    padding: 34px 22px 48px;
  }

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

  .about-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

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

  .release {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}