:root {
  --color-bg: #ffffff;
  --color-surface: #f4f6f9;
  --color-text: #1f1135;
  --color-accent: #621bf5;
  --color-divider: rgba(31, 17, 53, 0.25);

  --color-accent-100: #f1eafe;
  --color-accent-600: #4e15c4;
  --color-accent-700: #3d1099;

  --color-neutral-600: #546680;

  --color-mentioned: #24c26e;

  --font-heading: "Archivo", system-ui, sans-serif;
  --font-body: "Archivo", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-8: 48px;

  --radius: 0px;
  --shadow-sm: 0 1px 2px rgba(45, 43, 43, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  font-weight: 400;
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0;
}

a {
  color: inherit;
}

/* ---------- Layout ---------- */

.nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  row-gap: var(--space-2);
  gap: var(--space-3);
  padding: var(--space-4) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}

.nav-brand {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 18px;
}

.nav-link {
  margin-left: auto;
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) var(--space-8);
}

.hero-title {
  font-size: 25px;
  font-weight: 800;
  letter-spacing: normal;
  margin-bottom: var(--space-2);
}

.disclaimer {
  font-size: 13px;
  color: color-mix(in srgb, var(--color-text) 60%, transparent);
  margin-bottom: var(--space-5);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.hr {
  border: none;
  border-top: 2px solid var(--color-divider);
  margin: var(--space-6) 0;
}

.section-intro {
  max-width: 56ch;
  color: color-mix(in srgb, var(--color-text) 65%, transparent);
  margin-top: var(--space-2);
}

/* ---------- Buttons & inputs ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 14px;
  padding: var(--space-2) calc(var(--space-3) * 1.2);
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg);
  border: none;
}
.btn-primary:hover {
  background: var(--color-accent-600);
}
.btn-primary:active {
  background: var(--color-accent-700);
}
.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-divider);
  font-size: 12px;
}
.btn-secondary:hover {
  background: var(--color-surface);
}

.field {
  margin: 0;
}

.input {
  width: 100%;
  min-height: 36px;
  padding: 6px 10px;
  font-size: 14px;
  font-family: var(--font-body);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius);
}
.input:hover {
  border-color: var(--color-neutral-600);
}
.input:focus-visible {
  outline: none;
  border-color: var(--color-accent);
}

.submit-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: var(--space-4) 0;
}
.submit-form .field {
  flex: 1;
  min-width: 220px;
}
.submit-form .btn {
  align-self: flex-end;
  height: 38px;
}

/* ---------- Toast ---------- */

.toast {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 10px 14px;
  border: 1px solid var(--color-accent);
  background: var(--color-accent-100);
  font-size: 13px;
  margin-bottom: var(--space-4);
  animation: toastIn 0.25s ease-out;
}
.toast svg {
  flex: none;
  stroke: var(--color-accent-700);
}
.toast[hidden] {
  display: none;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Cards ---------- */

.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  position: relative;
  transition: border-color 0.2s;
  border: 1px solid transparent;
}
.card.expanded {
  grid-column: 1 / -1;
}
.card.just-updated {
  animation: pulseUpdate 2.5s ease-out 1;
}

@keyframes pulseUpdate {
  0% {
    box-shadow: 0 0 0 0 rgba(98, 27, 245, 0.35);
    border-color: var(--color-accent);
  }
  60% {
    box-shadow: 0 0 0 10px rgba(98, 27, 245, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(98, 27, 245, 0);
  }
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.card-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 22px;
}
.card-title.placeholder {
  color: color-mix(in srgb, var(--color-text) 45%, transparent);
  font-style: italic;
  font-size: 16px;
}

.card-timer {
  font-family: var(--font-mono);
  font-size: 11px;
  white-space: nowrap;
  color: color-mix(in srgb, var(--color-text) 60%, transparent);
  text-align: right;
}
.card-timer strong {
  font-weight: 700;
  color: var(--color-text);
}

.badge-row {
  display: flex;
  gap: 6px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.badge {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 9px;
  border: 1px solid var(--color-divider);
  font-size: 11px;
  white-space: nowrap;
}
.badge .mark {
  font-weight: 800;
  font-size: 12px;
}
.badge .mark.yes {
  color: var(--color-mentioned);
}
.badge .mark.no {
  color: var(--color-neutral-600);
}

.expand-hint {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 14px;
  font-size: 11px;
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}
.expand-hint svg {
  transition: transform 0.2s;
}
.card.expanded .expand-hint svg {
  transform: rotate(180deg);
}

.card-detail {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 2px solid var(--color-divider);
}

.kicker {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.55;
  margin-bottom: var(--space-2);
}

.model-rows {
  display: grid;
  gap: 6px;
  margin-bottom: var(--space-4);
}

.model-row {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  padding: 6px 0;
  border-bottom: 1px solid var(--color-divider);
}
.model-row .status {
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.prompt-list {
  margin: 0 0 var(--space-4);
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.7;
}

.credit-line {
  font-size: 12px;
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}
.credit-line a {
  color: var(--color-accent);
  font-weight: 600;
}

.empty-state {
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
  font-size: 13px;
}

@media (max-width: 480px) {
  .card-top {
    flex-wrap: wrap;
  }
  .card-timer {
    text-align: left;
  }
}