:root {
  --bg: #f5f7fa;
  --bg-accent: rgba(84, 110, 122, 0.08);
  --surface: #ffffff;
  --surface-soft: #fafcff;
  --border: rgba(38, 50, 56, 0.08);
  --text: #263238;
  --muted: #607d8b;
  --primary: #546e7a;
  --primary-strong: #455a64;
  --accent: #90a4ae;
  --danger: #c62828;
  --shadow: 0 18px 45px rgba(38, 50, 56, 0.08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --max-width: 1040px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, var(--bg-accent), transparent 32%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  line-height: 1.6;
  padding: 24px;
}

a {
  color: var(--primary);
}

.shell {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 12px 0 48px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  object-fit: cover;
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-name {
  margin: 0;
  font-size: 1.08rem;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--primary-strong);
}

.brand-subtitle {
  color: var(--muted);
  font-size: 0.92rem;
}

.hero {
  padding: 28px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(84, 110, 122, 0.08);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h1 {
  margin: 14px 0 12px;
  color: var(--text);
  letter-spacing: -0.05em;
  line-height: 1;
  font-size: clamp(2.2rem, 4vw, 4rem);
  max-width: 13ch;
}

.lede {
  margin: 0;
  max-width: 70ch;
  color: var(--muted);
  font-size: 1.03rem;
}

.grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 20px;
  margin-top: 20px;
}

.stack {
  display: grid;
  gap: 20px;
}

.card {
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
}

h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--primary-strong);
}

p,
li {
  color: var(--text);
}

.muted {
  color: var(--muted);
}

ul,
ol {
  margin: 0;
  padding-left: 20px;
}

li + li {
  margin-top: 10px;
}

.note {
  margin-top: 16px;
  border-left: 3px solid rgba(84, 110, 122, 0.35);
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--surface-soft);
}

.panel {
  display: grid;
  gap: 12px;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.pill {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(144, 164, 174, 0.12);
  color: var(--primary);
  font-size: 0.88rem;
  font-weight: 600;
}

.info-grid {
  display: grid;
  gap: 12px;
}

.info-item {
  padding: 14px 16px;
  border-radius: 16px;
  background: var(--surface-soft);
  border: 1px solid var(--border);
}

.info-label {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

form {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

label {
  display: grid;
  gap: 8px;
  font-size: 0.96rem;
  color: var(--text);
}

input,
textarea {
  width: 100%;
  padding: 14px 15px;
  border-radius: 14px;
  border: 1px solid rgba(84, 110, 122, 0.18);
  background: #fff;
  color: var(--text);
  font: inherit;
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

input:focus,
textarea:focus {
  border-color: rgba(84, 110, 122, 0.6);
  box-shadow: 0 0 0 4px rgba(84, 110, 122, 0.12);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 6px;
}

.actions.tight {
  margin-top: 0;
}

button,
.secondary {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 13px 18px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: transform 160ms ease, opacity 160ms ease, background 160ms ease;
}

button {
  color: #ffffff;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
  box-shadow: 0 12px 24px rgba(69, 90, 100, 0.18);
}

button.danger {
  background: linear-gradient(135deg, #b71c1c 0%, #7f1d1d 100%);
  box-shadow: 0 12px 24px rgba(183, 28, 28, 0.2);
}

button:hover,
.secondary:hover {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.65;
  cursor: progress;
  transform: none;
}

.secondary {
  color: var(--primary-strong);
  background: rgba(84, 110, 122, 0.08);
  border: 1px solid rgba(84, 110, 122, 0.16);
}

.success,
.error {
  display: none;
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid transparent;
}

.success {
  background: rgba(46, 125, 50, 0.08);
  color: #1b5e20;
  border-color: rgba(46, 125, 50, 0.18);
}

.error {
  background: rgba(198, 40, 40, 0.08);
  color: var(--danger);
  border-color: rgba(198, 40, 40, 0.18);
}

.footnote {
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.auth-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 16px;
  margin-top: 18px;
}

.auth-stack {
  display: grid;
  gap: 14px;
}

.auth-panel {
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--surface-soft);
}

.status-box {
  display: grid;
  gap: 8px;
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, #ffffff 0%, var(--surface-soft) 100%);
}

.status-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(84, 110, 122, 0.08);
  color: var(--primary-strong);
  font-size: 0.84rem;
  font-weight: 700;
}

.status-badge.active {
  background: rgba(46, 125, 50, 0.1);
  color: #1b5e20;
}

.field-grid {
  display: grid;
  gap: 12px;
}

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

input[readonly] {
  background: #f7f9fb;
  cursor: not-allowed;
}

.helper {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.dialog-shell {
  width: min(100vw - 32px, 560px);
  margin: 10vh auto;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 22px;
}

dialog {
  border: 0;
  background: transparent;
  padding: 0;
}

dialog::backdrop {
  background: rgba(20, 26, 31, 0.38);
  backdrop-filter: blur(2px);
}

.dialog-shell h2 {
  margin-bottom: 10px;
}

.dialog-copy {
  color: var(--muted);
  margin: 0;
}

.dialog-actions {
  justify-content: flex-end;
  margin-top: 20px;
}

.dialog-note {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--surface-soft);
  border: 1px solid var(--border);
}

code {
  padding: 2px 6px;
  border-radius: 8px;
  background: rgba(84, 110, 122, 0.08);
  color: var(--primary-strong);
}

.section-list {
  display: grid;
  gap: 18px;
}

@media (max-width: 920px) {
  .grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 680px) {
  body {
    padding: 16px;
  }

  .topbar {
    align-items: flex-start;
  }

  .hero,
  .card {
    padding: 20px;
  }

  .auth-panel,
  .status-box,
  .dialog-shell {
    padding: 18px;
  }

  .field-grid.two-col {
    grid-template-columns: 1fr;
  }

  .actions {
    flex-direction: column;
    align-items: stretch;
  }

  button,
  .secondary {
    width: 100%;
    text-align: center;
  }
}