:root {
  --bg: #0b1118;
  --bg-elevated: #121a25;
  --panel: #161f2b;
  --panel-strong: #1b2634;
  --panel-soft: #0f1722;
  --line: rgba(197, 212, 230, 0.12);
  --line-strong: rgba(197, 212, 230, 0.24);
  --text: #edf3fb;
  --text-muted: #95a7bb;
  --accent: #39c7a5;
  --accent-deep: #17987b;
  --warning: #f4b86a;
  --danger: #ff7d6b;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  color: var(--text);
  font-family: Aptos, "Segoe UI Variable", "Segoe UI", "Helvetica Neue", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(57, 199, 165, 0.12), transparent 26%),
    radial-gradient(circle at top right, rgba(63, 124, 255, 0.12), transparent 24%),
    linear-gradient(180deg, #091019 0%, #0d141d 100%);
}

button,
input,
select,
textarea {
  font: inherit;
}

button:disabled,
input:disabled,
select:disabled,
textarea:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.app-shell {
  width: min(100%, 960px);
  margin: 0 auto;
  padding: 20px 14px 44px;
}

.site-header {
  display: grid;
  gap: 14px;
  padding: 26px 0 12px;
}

.kicker,
.section-kicker,
.detail-label {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  color: var(--accent);
}

.site-header h1,
.section-heading h2,
.topbar h2 {
  margin: 0;
}

.site-header h1 {
  max-width: 11ch;
  font-size: clamp(2.4rem, 9vw, 4.8rem);
  line-height: 0.94;
}

.hero-copy,
.subtle,
.section-heading p,
.summary-copy,
.status,
.feed-meta span,
.feed-item p,
.detail-card p {
  color: var(--text-muted);
}

.hero-copy {
  max-width: 44rem;
  font-size: 1.02rem;
  line-height: 1.55;
}

.page-grid,
.section-stack,
.auth-grid,
.work-grid,
.detail-grid {
  display: grid;
  gap: 16px;
}

.panel {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(28, 39, 53, 0.88), rgba(18, 27, 39, 0.96));
  box-shadow: var(--shadow);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.section-heading {
  display: grid;
  gap: 8px;
}

.auth-switcher {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.compact-heading {
  margin-top: 6px;
}

.auth-grid,
.work-grid {
  grid-template-columns: 1fr;
}

.form-card,
.detail-card,
.guidance-card,
.feed-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel-strong);
}

.form-card,
.guidance-card {
  padding: 16px;
}

.form-card-wide {
  width: 100%;
}

.detail-card,
.feed-item {
  padding: 14px;
}

.detail-card-accent {
  background: linear-gradient(180deg, rgba(57, 199, 165, 0.16), rgba(27, 38, 52, 0.92));
  border-color: rgba(57, 199, 165, 0.3);
}

.detail-card-empty,
.empty-item {
  background: var(--panel-soft);
}

.control-row,
label {
  display: grid;
  gap: 8px;
}

.grow {
  width: 100%;
}

input,
select,
textarea {
  width: 100%;
  padding: 13px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: #0f1722;
  color: var(--text);
  outline: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(57, 199, 165, 0.66);
  box-shadow: 0 0 0 3px rgba(57, 199, 165, 0.12);
}

textarea {
  resize: vertical;
}

button {
  min-height: 48px;
  padding: 12px 16px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: var(--accent);
  color: #04120f;
  font-weight: 600;
  cursor: pointer;
  transition: background 140ms ease, border-color 140ms ease, transform 140ms ease;
}

button:hover {
  background: #4fd7b7;
  transform: translateY(-1px);
}

.secondary-button {
  background: transparent;
  color: var(--text);
  border-color: var(--line-strong);
}

.secondary-button:hover {
  background: rgba(255, 255, 255, 0.04);
}

.auth-tab {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--line-strong);
}

.auth-tab:hover {
  background: rgba(255, 255, 255, 0.04);
}

.auth-tab-active {
  background: var(--accent);
  color: #04120f;
  border-color: transparent;
}

.stack-list {
  display: grid;
  gap: 12px;
}

.feed-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
  margin-bottom: 8px;
}

.feed-item p,
.guidance-card p,
.detail-card p,
.summary-copy {
  margin: 0;
  line-height: 1.5;
}

.detail-card h3,
.form-card h3,
.guidance-card h3 {
  margin: 4px 0 6px;
}

.member-state {
  margin-top: 10px;
  font-weight: 600;
}

.member-state-ready {
  color: var(--accent);
}

.member-state-waiting {
  color: var(--warning);
}

.guidance-card-latest {
  border-color: rgba(57, 199, 165, 0.26);
}

.guidance-section {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.guidance-list {
  margin: 0;
  padding-left: 18px;
  color: var(--text-muted);
  line-height: 1.5;
}

.status {
  min-height: 1.2em;
  margin: 12px 0 0;
}

.status.success {
  color: var(--accent);
}

.status.error {
  color: var(--danger);
}

.hidden {
  display: none;
}

@media (min-width: 720px) {
  .app-shell {
    padding: 30px 18px 60px;
  }

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

  .detail-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}