:root {
  color-scheme: light;
  --text: #0f1419;
  --muted: #536471;
  --faint: #8b98a5;
  --line: #eff3f4;
  --line-strong: #cfd9de;
  --surface: #ffffff;
  --soft: #f7f9f9;
  --soft-hover: #eff1f1;
  --blue: #1d9bf0;
  --blue-hover: #1a8cd8;
  --blue-soft: rgba(29, 155, 240, 0.1);
  --red: #f4212e;
  --green: #00ba7c;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background: var(--surface);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.35;
  -webkit-font-smoothing: antialiased;
}

button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; }

.shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 600px) 350px;
  width: min(100%, 1265px);
  min-height: 100vh;
  margin: 0 auto;
}

.sidebar,
.rail {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  padding: 10px 20px 12px 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 52px;
  gap: 10px;
  color: var(--text);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.5px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 25px;
  font-weight: 900;
  letter-spacing: -2px;
  transition: background 0.18s ease;
}

.brand:hover .brand-mark { background: var(--soft-hover); }

nav {
  display: grid;
  gap: 4px;
  margin-top: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  width: fit-content;
  min-height: 50px;
  gap: 18px;
  padding: 0 16px 0 12px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  font-size: 19px;
  font-weight: 450;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.18s ease;
}

.nav-item:hover { background: var(--soft-hover); }
.nav-item.active { font-weight: 700; }
.nav-item svg {
  width: 25px;
  height: 25px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.sidebar-post {
  width: 90%;
  min-height: 50px;
  margin-top: 18px;
  font-size: 16px;
}

.button {
  border: 0;
  border-radius: 999px;
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.18s ease, opacity 0.18s ease;
}

.button:disabled { opacity: 0.5; cursor: wait; }
.button.primary { color: #fff; background: var(--blue); }
.button.primary:hover { background: var(--blue-hover); }
.button.secondary { border: 1px solid var(--line-strong); background: #fff; }
.button.secondary:hover { background: var(--soft); }
.button.full { width: 100%; }
.button.compact { padding: 7px 14px; font-size: 13px; }

.session-card {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  margin-top: auto;
  padding: 10px;
  border-radius: 999px;
  transition: background 0.18s ease;
}

.session-card:hover { background: var(--soft-hover); }
.avatar {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  color: #fff;
  background: #536471;
  font-size: 14px;
  font-weight: 800;
  text-transform: uppercase;
}

.avatar.small { width: 40px; height: 40px; font-size: 12px; }
.session-copy { display: flex; min-width: 0; flex: 1; flex-direction: column; }
.session-copy strong,
.session-copy span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.session-copy strong { font-size: 14px; }
.session-copy span { color: var(--muted); font-size: 13px; }

.icon-button {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.icon-button:hover { background: var(--blue-soft); color: var(--blue); }
.icon-button svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.sidebar-card { margin: 3px 10px 0; padding: 10px 2px; border-top: 1px solid var(--line); }
.status-line { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 12px; font-weight: 600; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #ffad1f; }
.status-dot.ready { background: var(--green); }
.sidebar-card p { margin: 5px 0 0 15px; color: var(--faint); font-size: 10px; }

main {
  min-width: 0;
  min-height: 100vh;
  border-right: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.mobile-header { display: none; }
.timeline-header {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.demo-notice {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-bottom: 1px solid #cfe9fa;
  color: #0c4a6e;
  background: #f0f9ff;
  font-size: 12px;
}

.demo-notice strong {
  padding: 2px 7px;
  border-radius: 999px;
  color: #fff;
  background: var(--blue);
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.timeline-title { display: flex; align-items: center; min-height: 66px; padding: 10px 16px 8px; }
.timeline-title > div { min-width: 0; }
.timeline-title h1 { margin: 0; font-size: 20px; line-height: 1.2; letter-spacing: -0.35px; }
.timeline-title p { overflow: hidden; margin: 3px 0 0; color: var(--muted); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.refresh-button { margin-left: auto; color: var(--muted); }

.feed-tabs { display: grid; grid-template-columns: repeat(2, 1fr); }
.feed-tabs button {
  position: relative;
  min-height: 48px;
  padding: 0 12px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.18s ease;
}

.feed-tabs button:hover { background: rgba(15, 20, 25, 0.04); }
.feed-tabs button.active { color: var(--text); font-weight: 700; }
.feed-tabs button.active::after {
  position: absolute;
  right: calc(50% - 28px);
  bottom: 0;
  left: calc(50% - 28px);
  height: 4px;
  border-radius: 999px;
  background: var(--blue);
  content: "";
}

.feed-count { display: none; }
.composer {
  position: relative;
  display: flex;
  gap: 12px;
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.composer form { min-width: 0; flex: 1; }
textarea {
  width: 100%;
  min-height: 54px;
  padding: 9px 2px;
  resize: vertical;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 19px;
  line-height: 1.35;
}

textarea::placeholder { color: var(--muted); opacity: 1; }
.composer-actions { display: flex; align-items: center; min-height: 40px; gap: 10px; border-top: 1px solid var(--line); padding-top: 9px; }
#post-media { position: absolute; width: 1px; height: 1px; opacity: 0; }
.media-picker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 8px;
  border-radius: 999px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
}

.media-picker:hover { background: var(--blue-soft); }
.media-picker svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.file-name { max-width: 170px; overflow: hidden; color: var(--muted); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.composer-actions .button { margin-left: auto; padding: 8px 18px; }
.composer-lock {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(255, 255, 255, 0.92);
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  backdrop-filter: blur(2px);
}

.composer-lock:hover { background: rgba(247, 249, 249, 0.94); }
.composer.authenticated .composer-lock { display: none; }
.feed { display: block; }
.post-card {
  display: flex;
  gap: 10px;
  padding: 12px 16px 8px;
  border-bottom: 1px solid var(--line);
  background: #fff;
  cursor: default;
  animation: appear 0.22s both;
  transition: background 0.18s ease;
}

.post-card:hover { background: rgba(0, 0, 0, 0.012); }
.post-column { min-width: 0; flex: 1; }
.post-head { display: flex; align-items: center; min-width: 0; gap: 5px; line-height: 1.2; }
.post-author { display: contents; }
.post-author strong { overflow: hidden; max-width: 45%; font-size: 14px; text-overflow: ellipsis; white-space: nowrap; }
.post-author strong:hover { text-decoration: underline; }
.post-author span,
.post-time { overflow: hidden; color: var(--muted); font-size: 14px; text-overflow: ellipsis; white-space: nowrap; }
.post-time { flex: 0 0 auto; }
.post-time::before { content: "·"; margin-right: 5px; }
.follow-button {
  margin-left: auto;
  padding: 5px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #fff;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.follow-button:hover { background: var(--soft); }
.follow-button.following { border-color: transparent; color: var(--muted); background: var(--soft); }
.post-body { margin: 4px 0 10px; font-size: 15px; line-height: 1.35; white-space: pre-wrap; }
.post-media {
  display: block;
  width: 100%;
  max-height: 510px;
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  background: var(--soft);
  object-fit: cover;
}

.media-placeholder {
  display: grid;
  width: 100%;
  aspect-ratio: 16 / 10;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  color: var(--muted);
  background: var(--soft);
  font-size: 13px;
}

.media-placeholder.unavailable {
  aspect-ratio: auto;
  min-height: 88px;
}

.post-actions { display: grid; grid-template-columns: repeat(2, minmax(70px, 1fr)); max-width: 240px; margin-top: 7px; }
.action-button {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  gap: 6px;
  padding: 5px 8px 5px 0;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  transition: color 0.18s ease, background 0.18s ease;
}

.action-button:hover { color: var(--blue); }
.action-button.liked { color: var(--red); }
.action-button .heart { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; font-size: 18px; }
.action-button:hover .heart { background: var(--blue-soft); }
.action-button.liked:hover .heart { background: rgba(244, 33, 46, 0.1); }
.empty { padding: 64px 28px; border-bottom: 1px solid var(--line); color: var(--muted); text-align: center; }
.skeleton-card { height: 170px; padding: 20px 72px; border-bottom: 1px solid var(--line); }
.skeleton-card div { height: 10px; margin-bottom: 14px; border-radius: 20px; background: linear-gradient(90deg, #eff3f4 25%, #f7f9f9 50%, #eff3f4 75%); background-size: 200% 100%; animation: shimmer 1.2s infinite; }
.skeleton-card div:nth-child(1) { width: 28%; }
.skeleton-card div:nth-child(2) { width: 88%; margin-top: 30px; }
.skeleton-card div:nth-child(3) { width: 62%; }

.rail { padding: 12px 0 0 30px; }
.rail-card { padding: 16px; border-radius: 16px; background: var(--soft); }
.rail-card h2,
.rail-card h3 { margin: 0; letter-spacing: -0.3px; }
.welcome-card h2 { font-size: 20px; }
.welcome-card p { margin: 9px 0 15px; color: var(--muted); font-size: 13px; line-height: 1.4; }
.people-card { margin-top: 16px; padding: 14px 0 4px; overflow: hidden; }
.portfolio-card { margin-top: 16px; padding: 18px; }
.portfolio-card h3 { margin: 8px 0; font-size: 18px; line-height: 1.2; }
.portfolio-card p { margin: 0 0 10px; color: var(--muted); font-size: 13px; line-height: 1.45; }
.portfolio-card .availability-copy { color: var(--text); font-weight: 650; }
.demo-label { color: var(--blue); font-size: 10px; font-weight: 800; letter-spacing: 0.1em; }
.contact-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.contact-links a {
  padding: 7px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
}
.contact-links a:hover { border-color: var(--text); background: #fff; }
.static-demo .media-picker { display: none; }
.rail-heading { display: flex; align-items: center; justify-content: space-between; padding: 0 16px 9px; }
.rail-heading h3 { font-size: 20px; }
.people-list { display: grid; }
.person { display: flex; align-items: center; min-height: 64px; gap: 10px; padding: 10px 16px; transition: background 0.18s ease; }
.person:hover { background: var(--soft-hover); }
.person-copy { display: flex; min-width: 0; flex: 1; flex-direction: column; }
.person-copy strong,
.person-copy span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.person-copy strong { font-size: 14px; }
.person-copy span { color: var(--muted); font-size: 13px; }
.person button { padding: 6px 14px; border: 0; border-radius: 999px; color: #fff; background: var(--text); font-size: 12px; font-weight: 700; cursor: pointer; }
.person button:hover { opacity: 0.88; }
.person button.following { color: var(--text); background: #fff; box-shadow: inset 0 0 0 1px var(--line-strong); }
.muted { margin: 14px 16px; color: var(--muted); font-size: 13px; }
.rail footer { padding: 15px 12px; color: var(--muted); font-size: 11px; line-height: 1.55; }
.rail footer a { text-decoration: none; }
.rail footer a:hover { text-decoration: underline; }

.eyebrow { display: block; color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: 0.5px; text-transform: uppercase; }
dialog {
  width: min(430px, calc(100vw - 30px));
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 16px;
  color: var(--text);
  background: #fff;
  box-shadow: 0 20px 60px rgba(15, 20, 25, 0.22);
}

dialog::backdrop { background: rgba(15, 20, 25, 0.5); }
dialog h2 { margin: 8px 0 6px; font-size: 27px; line-height: 1.15; letter-spacing: -0.7px; }
dialog > p { margin: 0; color: var(--muted); font-size: 13px; }
.dialog-close { position: absolute; top: 14px; right: 14px; width: 34px; height: 34px; border: 0; border-radius: 50%; background: transparent; font-size: 23px; cursor: pointer; }
.dialog-close:hover { background: var(--soft-hover); }
.auth-tabs { display: grid; grid-template-columns: repeat(2, 1fr); margin: 24px 0 18px; border-bottom: 1px solid var(--line); }
.auth-tabs button { position: relative; padding: 11px 6px; border: 0; background: transparent; color: var(--muted); font-size: 13px; font-weight: 650; cursor: pointer; }
.auth-tabs button.active { color: var(--text); }
.auth-tabs button.active::after { position: absolute; right: 22%; bottom: -1px; left: 22%; height: 3px; border-radius: 999px; background: var(--blue); content: ""; }
#auth-form { display: grid; gap: 7px; }
#auth-form label { margin-top: 6px; color: var(--muted); font-size: 12px; font-weight: 650; }
#auth-form input { width: 100%; padding: 12px 13px; border: 1px solid var(--line-strong); border-radius: 8px; outline: none; background: #fff; }
#auth-form input:focus { border-color: var(--blue); box-shadow: 0 0 0 1px var(--blue); }
.hidden { display: none !important; }
.form-error { min-height: 18px; margin: 4px 0; color: var(--red); font-size: 12px; }
.toast { position: fixed; left: 50%; bottom: 28px; z-index: 10; padding: 10px 16px; border-radius: 6px; color: #fff; background: var(--blue); box-shadow: 0 8px 24px rgba(15, 20, 25, 0.18); font-size: 13px; opacity: 0; transform: translate(-50%, 12px); pointer-events: none; transition: 0.2s ease; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@keyframes appear { from { opacity: 0; } }
@keyframes shimmer { to { background-position: -200% 0; } }

@media (max-width: 1120px) {
  .shell { grid-template-columns: 240px minmax(0, 600px); width: min(100%, 840px); }
  .rail { display: none; }
}

@media (max-width: 860px) and (min-width: 761px) {
  .shell { grid-template-columns: 78px minmax(0, 600px); width: min(100%, 678px); }
  .sidebar { align-items: center; padding-right: 10px; }
  .brand-name,
  .nav-item span,
  .sidebar-post,
  .session-copy,
  .session-card .icon-button,
  .sidebar-card { display: none; }
  .nav-item { width: 50px; justify-content: center; padding: 0; }
  .session-card { width: 52px; justify-content: center; padding: 6px; }
}

@media (max-width: 760px) {
  .shell { display: block; width: 100%; }
  .sidebar { display: none; }
  main { border: 0; }
  .mobile-header {
    position: sticky;
    top: 0;
    z-index: 8;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    min-height: 54px;
    padding: 4px 12px;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
  }
  .mobile-header .brand { min-height: 44px; }
  .mobile-header .brand-mark { width: 40px; height: 40px; font-size: 22px; }
  .mobile-header strong { font-size: 16px; }
  .mobile-header .button { justify-self: end; }
  .timeline-header { top: 54px; }
  .demo-notice { align-items: flex-start; flex-direction: column; gap: 4px; padding: 8px 14px; }
  .timeline-title { display: none; }
  .feed-tabs button { min-height: 46px; }
  .composer { padding: 12px 14px 9px; }
  .composer > .avatar { width: 40px; height: 40px; }
  textarea { min-height: 50px; font-size: 18px; }
  .media-picker span { display: none; }
  .file-name { max-width: 110px; }
  .post-card { padding: 11px 14px 7px; }
  .post-author strong { max-width: 42%; }
  .post-media,
  .media-placeholder { border-radius: 13px; }
  dialog { padding: 27px 22px; }
}

@media (max-width: 420px) {
  .follow-button { padding: 4px 8px; font-size: 11px; }
  .post-author strong { max-width: 35%; }
  .post-author span,
  .post-time { font-size: 13px; }
}