:root {
  color-scheme: dark;
  --bg: #061527;
  --panel: #0b2138;
  --panel-2: #102b46;
  --text: #eef6ff;
  --muted: #9fb6cc;
  --line: #24425f;
  --primary: #38bdf8;
  --primary-2: #16a34a;
  --danger: #fb7185;
  --shadow: 0 24px 70px rgb(0 0 0 / 0.34);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top left, #123f66 0, #061527 34rem);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(18px, 4vw, 54px);
  border-bottom: 1px solid rgb(255 255 255 / 0.08);
  background: rgb(6 21 39 / 0.82);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { font-weight: 800; letter-spacing: 0; }
nav { display: flex; align-items: center; gap: 14px; }
nav form { margin: 0; }
nav button { color: var(--muted); background: transparent; border: 0; cursor: pointer; }

main { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 34px 0 60px; }
.hero {
  min-height: calc(100vh - 92px);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.7fr);
  gap: 36px;
  align-items: center;
}
h1 { font-size: clamp(2.4rem, 7vw, 6rem); line-height: 0.95; margin: 0 0 18px; }
h2 { margin: 0 0 18px; font-size: 1.1rem; }
.eyebrow { color: var(--primary); text-transform: uppercase; font-size: 0.76rem; font-weight: 800; letter-spacing: 0.12em; }
.lede { color: var(--muted); max-width: 650px; font-size: 1.16rem; line-height: 1.75; }
.actions, .composer-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.button, button {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 16px;
  color: var(--text);
  background: var(--panel-2);
  cursor: pointer;
}
.button.primary, button.primary { background: var(--primary); color: #03101c; border-color: var(--primary); font-weight: 800; }
.button.ghost { background: transparent; }

.hero-panel, .panel, .auth-card, .composer, .post {
  background: linear-gradient(180deg, rgb(16 43 70 / 0.96), rgb(9 29 50 / 0.96));
  border: 1px solid rgb(255 255 255 / 0.09);
  border-radius: 8px;
  box-shadow: var(--shadow);
}
.hero-panel { padding: 30px; display: grid; gap: 12px; }
.hero-panel span { color: var(--primary); font-weight: 800; }
.hero-panel strong { font-size: 2rem; }
.hero-panel small, .muted { color: var(--muted); }

.auth-card { width: min(520px, 100%); margin: 7vh auto; padding: 28px; }
.auth-card h1 { font-size: 2rem; line-height: 1.1; }
.stack { display: grid; gap: 14px; }
label { display: grid; gap: 7px; color: var(--muted); font-size: 0.92rem; }
input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #071a2f;
  color: var(--text);
  padding: 11px 12px;
}
textarea { resize: vertical; }
.check { grid-template-columns: auto 1fr; align-items: center; }
.check input { width: auto; }
.error { color: #fff; background: rgb(251 113 133 / 0.16); border: 1px solid rgb(251 113 133 / 0.45); padding: 10px 12px; border-radius: 8px; }

.page-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; align-items: start; }
.span-2 { grid-column: span 2; }
.panel { padding: 22px; }
.metric-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.metric-grid div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: rgb(6 21 39 / 0.5);
}
.metric-grid span { display: block; font-size: 1.55rem; font-weight: 800; color: var(--primary); }
.metric-grid small { color: var(--muted); }
.calendar-list { display: grid; gap: 10px; }
.calendar-list article, .recommendation {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}
.calendar-list span, .recommendation small { display: block; color: var(--muted); }
.icon-button { width: 36px; height: 36px; padding: 0; }

.feed-layout { display: grid; grid-template-columns: 360px minmax(0, 1fr); gap: 20px; align-items: start; }
.composer, .post { padding: 18px; }
.composer { position: sticky; top: 90px; }
.feed { display: grid; gap: 16px; }
.post header, .post footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.post time, .post footer span { color: var(--muted); font-size: 0.9rem; }
.post img { width: 100%; max-height: 520px; object-fit: cover; border-radius: 8px; border: 1px solid var(--line); }
.comment-form { display: grid; grid-template-columns: 1fr auto; gap: 10px; margin-top: 12px; }

@media (max-width: 860px) {
  .hero, .page-grid, .feed-layout { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
  .metric-grid { grid-template-columns: 1fr; }
  .composer { position: static; }
  .topbar { align-items: flex-start; gap: 12px; }
  nav { flex-wrap: wrap; justify-content: flex-end; }
}