/* ============================================================
   Design tokens. Backgrounds are never pure #fff or #000.
   ============================================================ */
@font-face {
  font-family: 'Geist Variable';
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url('/fonts/geist.woff2') format('woff2-variations');
}
@font-face {
  font-family: 'Geist Mono Variable';
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url('/fonts/geist-mono.woff2') format('woff2-variations');
}

:root {
  --bg: #fafaf7;
  --bg-elevated: #f4f3ee;
  --border: #e7e5df;
  --border-strong: #cfcdc6;
  --text-primary: #1f1f1c;
  --text-secondary: #3d3d3a;
  --text-muted: #6b6a65;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #dbeafe;
  --on-accent: #fafaf7;
  --success: #15803d;
  --warning: #b45309;
  --danger: #b91c1c;

  --font-sans:
    'Geist Variable', 'Geist', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono:
    'Geist Mono Variable', 'Geist Mono', 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --text-h1: clamp(2rem, 2vw + 1rem, 2.75rem);
  --text-h2: clamp(1.25rem, 0.5vw + 1rem, 1.5rem);
  --text-body-lg: 1.125rem;
  --text-body: 1rem;
  --text-small: 0.875rem;
  --text-xs: 0.75rem;
  --text-code: 0.9375rem;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --container: 720px;

  --shadow-rgb: 31, 31, 28;
  --shadow-subtle: 0 1px 2px rgb(var(--shadow-rgb) / 0.04);
  --shadow-focus: 0 0 0 3px var(--accent-soft);

  --ease-out: cubic-bezier(0.2, 0, 0, 1);
  --dur-instant: 100ms;
  --dur-default: 200ms;
  --dur-slow: 300ms;
}

.dark {
  --bg: #1a1a18;
  --bg-elevated: #232320;
  --border: #2f2f2c;
  --border-strong: #45443f;
  --text-primary: #e8e6df;
  --text-secondary: #c8c6bf;
  --text-muted: #9a9892;
  --accent: #60a5fa;
  --accent-hover: #93c5fd;
  --accent-soft: #1e3a5f;
  --on-accent: #1a1a18;
  --success: #4ade80;
  --warning: #fbbf24;
  --danger: #f87171;

  --shadow-rgb: 0, 0, 0;
  --shadow-subtle: 0 1px 2px rgb(0 0 0 / 0.4);
}

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

html {
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.6;
  transition:
    background-color var(--dur-default) var(--ease-out),
    color var(--dur-default) var(--ease-out);
}

body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
}

svg {
  display: block;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-elevated);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
}

::selection {
  background: var(--accent-soft);
  color: var(--text-primary);
}

:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-md);
}

[hidden] {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  position: fixed;
  left: 16px;
  top: 16px;
  background: var(--bg);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-focus);
  z-index: 50;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
  width: 100%;
}
@media (min-width: 640px) {
  .container {
    padding-inline: 32px;
  }
}
@media (min-width: 1024px) {
  .container {
    padding-inline: 48px;
  }
}

/* ============================================================
   Header
   ============================================================ */
.hdr {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 64px;
  background: color-mix(in oklab, var(--bg) 78%, transparent);
  backdrop-filter: saturate(120%) blur(12px);
  -webkit-backdrop-filter: saturate(120%) blur(12px);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--dur-default) var(--ease-out),
    box-shadow var(--dur-default) var(--ease-out);
}
.hdr.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-subtle);
}
.hdr-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.wordmark {
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.005em;
}
.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition:
    color var(--dur-instant) var(--ease-out),
    background var(--dur-instant) var(--ease-out);
}
.icon-btn:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.theme-toggle {
  position: relative;
}
.theme-icon {
  position: absolute;
  inset: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    opacity var(--dur-default) var(--ease-out),
    transform var(--dur-default) var(--ease-out);
}
.theme-icon-sun {
  opacity: 0;
  transform: rotate(-180deg);
}
.dark .theme-icon-moon {
  opacity: 0;
  transform: rotate(180deg);
}
.dark .theme-icon-sun {
  opacity: 1;
  transform: rotate(0deg);
}
.theme-toggle.swapping .theme-icon {
  opacity: 0 !important;
}

/* ============================================================
   Panels + type
   ============================================================ */
.panel {
  padding-top: 64px;
}
@media (min-width: 640px) {
  .panel {
    padding-top: 96px;
  }
}
.panel:not([hidden]) {
  animation: fade-up var(--dur-slow) var(--ease-out);
}
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.eyebrow {
  margin: 0 0 12px;
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}

h1 {
  margin: 0;
  font-size: var(--text-h1);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
/* Headings get focus programmatically when a panel swaps in; no ring needed. */
h1:focus,
h1:focus-visible {
  outline: none;
  box-shadow: none;
}

h2 {
  margin: 0 0 8px;
  font-size: var(--text-h2);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.lede {
  margin: 16px 0 40px;
  font-size: var(--text-body-lg);
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 60ch;
}

/* ============================================================
   Form
   ============================================================ */
.field-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}
.label {
  font-size: var(--text-small);
  font-weight: 500;
}
.hint {
  margin: 8px 0 0;
  font-size: var(--text-small);
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.field-head .hint {
  margin: 0;
}
.error {
  margin: 4px 0 0;
  font-size: var(--text-small);
  color: var(--danger);
}
.error:empty {
  display: none;
}

.dropzone {
  position: relative;
}
.env-input {
  display: block;
  width: 100%;
  min-height: 220px;
  resize: vertical;
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: var(--text-code);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--dur-instant) var(--ease-out);
}
.env-input::placeholder {
  color: var(--text-muted);
}
.env-input:hover {
  border-color: var(--border-strong);
}
.env-input:focus-visible {
  border-color: var(--accent);
}
.env-input[aria-invalid='true'] {
  border-color: var(--danger);
}

.drop-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
  color: var(--accent);
  background: color-mix(in oklab, var(--accent-soft) 85%, transparent);
  border: 2px dashed var(--accent);
  border-radius: var(--radius-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-instant) var(--ease-out);
}
.dropzone.dragging .drop-overlay {
  opacity: 1;
}

.actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.actions .hint {
  margin: 0;
}
.reveal-actions:not([hidden]) {
  animation: fade-up var(--dur-slow) var(--ease-out);
}
.actions-secondary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: var(--text-body);
  font-weight: 500;
  line-height: 1.5;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    background var(--dur-instant) var(--ease-out),
    color var(--dur-instant) var(--ease-out),
    border-color var(--dur-instant) var(--ease-out);
}
.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
}
.btn-primary svg {
  transition: transform var(--dur-default) var(--ease-out);
}
.btn-primary:hover svg {
  transform: translateX(4px);
}
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-secondary:hover {
  background: var(--bg-elevated);
  border-color: var(--border-strong);
}
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn-ghost:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}
input[type='file']:focus-visible + .btn,
.btn:has(+ input[type='file']:focus-visible) {
  box-shadow: var(--shadow-focus);
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 48px 0 0;
  padding: 0;
  list-style: none;
}
.badges li {
  padding: 2px 8px;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

/* ============================================================
   Investigation
   ============================================================ */
.progress {
  height: 4px;
  background: var(--bg-elevated);
  border-radius: 9999px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: width var(--dur-slow) var(--ease-out);
}

.steps {
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}
.step {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  animation: fade-in var(--dur-default) var(--ease-out);
}
.step:last-child {
  border-bottom: none;
}
@keyframes fade-in {
  from {
    opacity: 0;
  }
}
.step-icon {
  margin-top: 2px;
  color: var(--text-muted);
}
.step.done .step-icon {
  color: var(--success);
}
.step.running .step-icon svg {
  animation: spin 900ms linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
.step-title {
  font-weight: 500;
}
.step.running .step-title::after {
  content: '…';
}
.step-detail {
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: var(--text-small);
  color: var(--text-muted);
  overflow-wrap: anywhere;
}
.step-detail:empty {
  display: none;
}

/* ============================================================
   Result
   ============================================================ */
.verdict {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  padding: 2px 10px;
  font-size: var(--text-small);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--danger);
  background: color-mix(in oklab, var(--danger) 12%, transparent);
  border: 1px solid color-mix(in oklab, var(--danger) 40%, transparent);
  border-radius: var(--radius-sm);
}

.report {
  display: grid;
  grid-template-columns: 1fr;
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* Generous space above, so the report screenshots cleanly on its own. */
.divider {
  margin: 96px 0 48px;
  border: none;
  border-top: 1px solid var(--border);
}
@media (min-width: 640px) {
  .report {
    grid-template-columns: 1fr 1fr;
  }
}
.report div {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
@media (min-width: 640px) {
  .report div:nth-child(odd) {
    border-right: 1px solid var(--border);
  }
  .report div:nth-last-child(-n + 2) {
    border-bottom: none;
  }
}
.report div:last-child {
  border-bottom: none;
}
.report dt {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.report dd {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-code);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.callout {
  margin: 0 0 24px;
  padding: 16px 20px;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  background: color-mix(in oklab, var(--accent-soft) 45%, transparent);
  color: var(--text-secondary);
}
.callout-warning {
  border-left-color: var(--warning);
  background: color-mix(in oklab, var(--warning) 9%, transparent);
}
.callout h2 {
  color: var(--text-primary);
  font-size: var(--text-body-lg);
}
.callout p,
.callout ul {
  margin: 0 0 12px;
}
.callout > :last-child {
  margin-bottom: 0;
}
.callout ul {
  padding-left: 20px;
}
.callout li + li {
  margin-top: 4px;
}
.callout a {
  color: var(--text-primary);
  text-decoration: underline;
  text-decoration-color: var(--border-strong);
  text-underline-offset: 3px;
  transition:
    color var(--dur-instant) var(--ease-out),
    text-decoration-color var(--dur-instant) var(--ease-out);
}
.callout a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

/* ============================================================
   Footer
   ============================================================ */
.ftr {
  border-top: 1px solid var(--border);
  padding: 48px 0;
  margin-top: 96px;
  font-size: var(--text-small);
  color: var(--text-muted);
}
.ftr-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.ftr-links {
  display: flex;
  align-items: center;
  gap: 10px;
}
.ftr a {
  transition: color var(--dur-instant) var(--ease-out);
}
.ftr a:hover {
  color: var(--accent);
}
@media (max-width: 540px) {
  .ftr-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}

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