:root {
  color-scheme: dark;
  --bg: #0a0b10;
  --bg-gradient: radial-gradient(1200px 600px at 10% -10%, #1a1f35 0%, transparent 55%), var(--bg);
  --surface-1: #12141c;
  --surface-2: #181b25;
  --surface-3: #1f2330;
  --border: #262a38;
  --border-strong: #343a4d;
  --text: #f1f3fa;
  --text-muted: #a4abc0;
  --text-dim: #7a8199;
  --accent: #8faaff;
  --accent-strong: #a8bdff;
  --accent-ink: #0a0b10;
  --success: #4ade80;
  --success-soft: rgba(74, 222, 128, 0.14);
  --warning: #fbbf24;
  --warning-soft: rgba(251, 191, 36, 0.14);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.14);
  --info-soft: rgba(143, 170, 255, 0.14);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.35);
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg-gradient);
  min-height: 100vh;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
  font-weight: 600;
}

h1 {
  font-size: 1.75rem;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.2rem;
  letter-spacing: -0.005em;
}

h3 {
  font-size: 1rem;
}

p {
  margin: 0;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-radius: 4px;
}

a:hover {
  color: var(--accent-strong);
  text-decoration: underline;
}

:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
  border-radius: 6px;
}

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

button {
  cursor: pointer;
}

.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  z-index: 10;
  transform: translateY(calc(-100% - 16px));
  transition: transform 0.15s;
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: min(1080px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 32px 0 64px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 32px;
}

.brand-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand {
  display: inline-block;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

.brand:hover {
  color: var(--text);
  text-decoration: none;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

.user-chip {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 6px 6px 6px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
}

.user-chip__email {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.page {
  display: grid;
  gap: 24px;
}

.panel {
  padding: 28px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.panel-subtle {
  padding: 20px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.centered-panel {
  width: min(460px, 100%);
  margin: 12vh auto 0;
  text-align: center;
}

.centered-panel .primary-button {
  align-self: center;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.panel-head > div {
  min-width: 0;
  display: grid;
  gap: 6px;
}

.user-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
  flex-wrap: wrap;
}

/* Forms */

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

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

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

.field-label {
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

input[type="text"],
input[type="email"],
textarea,
select {
  width: 100%;
  padding: 12px 14px;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color 0.15s, background 0.15s;
}

input[type="text"]:hover,
input[type="email"]:hover,
textarea:hover,
select:hover {
  border-color: var(--border-strong);
}

input[type="text"]:focus-visible,
input[type="email"]:focus-visible,
textarea:focus-visible,
select:focus-visible {
  border-color: var(--accent);
  outline-offset: 0;
  outline: 2px solid var(--accent);
  background: var(--surface-1);
}

input[type="text"]:disabled,
textarea:disabled,
select:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

textarea {
  resize: vertical;
  min-height: 180px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-muted) 50%), linear-gradient(135deg, var(--text-muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) 54%, calc(100% - 13px) 54%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 36px;
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* Buttons */

.primary-button,
.ghost-button,
.ghost-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 18px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.05s;
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.primary-button {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}

.primary-button:hover,
.primary-button:focus-visible {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: var(--accent-ink);
  text-decoration: none;
}

.primary-button:active {
  transform: translateY(1px);
}

.ghost-button,
.ghost-link {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}

.ghost-button:hover,
.ghost-link:hover,
.ghost-button:focus-visible,
.ghost-link:focus-visible {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--accent);
  text-decoration: none;
}

button:disabled,
.primary-button[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Alerts (WCAG: icon + text, never color alone) */

.alert {
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: var(--radius-md);
  background: var(--surface-2);
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 12px;
  align-items: start;
}

.alert::before {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 22px;
  height: 22px;
  width: 22px;
  text-align: center;
  border-radius: var(--radius-pill);
}

.alert > * {
  grid-column: 2;
}

.alert strong {
  display: block;
  font-weight: 600;
  margin-bottom: 2px;
}

.alert-warning {
  border-left-color: var(--warning);
  background: var(--warning-soft);
}

.alert-warning::before {
  content: "!";
  background: var(--warning);
  color: #3a2a05;
}

.alert-error {
  border-left-color: var(--danger);
  background: var(--danger-soft);
}

.alert-error::before {
  content: "\00d7";
  background: var(--danger);
  color: #3a0a0a;
}

.alert-success {
  border-left-color: var(--success);
  background: var(--success-soft);
}

.alert-success::before {
  content: "\2713";
  background: var(--success);
  color: #052e13;
}

.alert-info {
  border-left-color: var(--accent);
  background: var(--info-soft);
}

.alert-info::before {
  content: "i";
  background: var(--accent);
  color: var(--accent-ink);
  font-style: italic;
}

/* Status badges (icon + label so not color-only) */

.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px 4px 8px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid transparent;
}

.status::before {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.75rem;
  line-height: 1;
}

.status-queued,
.status-running {
  background: var(--info-soft);
  color: var(--accent-strong);
  border-color: rgba(143, 170, 255, 0.3);
}

.status-queued::before {
  content: "\25cb";
}

.status-running::before {
  content: "\25cf";
  animation: pulse 1.4s ease-in-out infinite;
}

.status-succeeded {
  background: var(--success-soft);
  color: var(--success);
  border-color: rgba(74, 222, 128, 0.3);
}

.status-succeeded::before {
  content: "\2713";
}

.status-failed {
  background: var(--danger-soft);
  color: var(--danger);
  border-color: rgba(248, 113, 113, 0.3);
}

.status-failed::before {
  content: "\00d7";
}

.status-needs_attention {
  background: var(--warning-soft);
  color: var(--warning);
  border-color: rgba(251, 191, 36, 0.3);
}

.status-needs_attention::before {
  content: "!";
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Attempt page */

.attempt-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.attempt-meta > div {
  padding: 14px 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  min-width: 0;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.detail-grid > div {
  min-width: 0;
  display: grid;
  gap: 6px;
}

.result-card {
  padding: 22px;
  background: var(--success-soft);
  border: 1px solid rgba(74, 222, 128, 0.3);
  border-radius: var(--radius-lg);
  display: grid;
  gap: 16px;
}

.result-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.result-head > div {
  min-width: 0;
}

.key-output {
  width: 100%;
  padding: 14px 16px;
  background: var(--surface-1);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* Usage cards */

.usage-section {
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.usage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.usage-card {
  padding: 20px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: grid;
  gap: 16px;
}

.usage-card-error {
  border-color: rgba(248, 113, 113, 0.35);
}

.usage-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.usage-card-head > div {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.usage-metric {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
}

.usage-metric-label {
  color: var(--text-muted);
  font-size: 0.85rem;
  min-width: 72px;
}

.usage-bar {
  height: 6px;
  background: var(--surface-3);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.usage-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: inherit;
  transition: width 0.3s;
}

.usage-bar-fill.is-warning {
  background: var(--warning);
}

.usage-bar-fill.is-danger {
  background: var(--danger);
}

.usage-metric-value {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 0.95rem;
  min-width: 48px;
  text-align: right;
}

.usage-metric-reset {
  grid-column: 1 / -1;
  color: var(--text-dim);
  font-size: 0.8rem;
}

/* Typography utilities */

.mono,
.key-output {
  font-family: var(--font-mono);
}

.mono,
.key-output,
.alert p,
.alert strong,
.attempt-meta div,
.detail-grid div {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.label {
  display: inline-block;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 2px;
}

/* History table */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  text-align: left;
  padding: 12px 14px;
  vertical-align: top;
}

th {
  background: var(--surface-2);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border);
}

tbody tr {
  border-top: 1px solid var(--border);
}

tbody tr:first-child {
  border-top: none;
}

tbody tr:hover {
  background: var(--surface-2);
}

td.mono {
  font-size: 0.82rem;
}

/* Visually-hidden (screen reader only) */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden {
  display: none;
}

/* Responsive */

@media (max-width: 700px) {
  body {
    font-size: 14px;
  }

  .shell {
    width: calc(100vw - 20px);
    padding: 20px 0 40px;
  }

  .topbar,
  .panel-head,
  .result-head {
    flex-direction: column;
    align-items: stretch;
  }

  .panel {
    padding: 20px;
  }

  .form-actions {
    justify-content: stretch;
  }

  .form-actions .primary-button,
  .form-actions .ghost-button {
    flex: 1 1 auto;
  }
}