:root {
  color-scheme: dark;
  --color-background: #08090a;
  --color-panel: #0f1011;
  --color-surface: #191a1b;
  --color-surface-raised: #23252a;
  --color-text: #f7f8f8;
  --color-text-secondary: #d0d6e0;
  --color-text-muted: #8a8f98;
  --color-text-subtle: #62666d;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-subtle: rgba(255, 255, 255, 0.05);
  --color-accent: #7170ff;
  --color-accent-strong: #5e6ad2;
  --color-accent-hover: #828fff;
  --color-success: #10b981;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-panel: 0 24px 80px rgba(0, 0, 0, 0.36), inset 0 1px 0 rgba(255, 255, 255, 0.03);
  --page-gutter: clamp(1rem, 2.5vw, 2.5rem);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--color-background);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--color-text);
  background:
    radial-gradient(circle at 12% 0%, rgba(113, 112, 255, 0.16), transparent 34rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.035), transparent 28rem),
    var(--color-background);
  font-family: var(--font-sans);
  font-feature-settings: "cv01", "ss03";
  line-height: 1.5;
}

body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.45), transparent 68%);
}

header,
main {
  width: min(1480px, calc(100% - (var(--page-gutter) * 2)));
  margin-inline: auto;
}

header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.5rem 2rem;
  align-items: end;
  padding: clamp(3rem, 6vw, 5.5rem) 0 2rem;
}

header > p:first-child,
[data-section] > p:first-child {
  margin: 0 0 0.8rem;
  color: var(--color-accent-hover);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 1rem;
  font-size: clamp(2.7rem, 7vw, 5.75rem);
  font-weight: 510;
  letter-spacing: -0.07em;
  line-height: 0.94;
}

header > p:not(:first-child) {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: clamp(1rem, 1.8vw, 1.18rem);
}

header dl {
  display: grid;
  grid-template-columns: repeat(2, minmax(8rem, 1fr));
  gap: 0.75rem;
  margin: 0;
}

header dl > div {
  min-width: 10rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
}

dt {
  color: var(--color-text-subtle);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

dd {
  margin: 0.35rem 0 0;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 510;
}

main {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(420px, 1.35fr) minmax(260px, 0.72fr);
  gap: 1rem;
  align-items: start;
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

[data-section] {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.018));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-panel);
}

[data-section]::before {
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.28), transparent);
  opacity: 0.55;
}

[data-section="brief-input"] {
  padding: clamp(1.25rem, 2vw, 1.6rem);
}

[data-section="brief-output"] {
  min-height: 720px;
  padding: clamp(1.25rem, 2vw, 1.7rem);
}

[data-section="refinement-log"] {
  padding: clamp(1.1rem, 1.8vw, 1.35rem);
  background: linear-gradient(180deg, rgba(113, 112, 255, 0.08), rgba(255, 255, 255, 0.018));
}

h2 {
  margin-bottom: 0.55rem;
  font-size: clamp(1.35rem, 2.3vw, 1.75rem);
  font-weight: 510;
  letter-spacing: -0.035em;
  line-height: 1.1;
}

h2 + p,
article p,
aside p {
  color: var(--color-text-muted);
}

.studio-state {
  display: grid;
  gap: 0.45rem;
  margin-top: 1.25rem;
  padding: 0.85rem 0.95rem;
  color: var(--color-text-secondary);
  background: rgba(113, 112, 255, 0.06);
  border: 1px solid rgba(113, 112, 255, 0.18);
  border-radius: var(--radius-md);
  font-size: 0.86rem;
}

[data-error-message] {
  color: #fca5a5;
}

[data-error-message][hidden] {
  display: none;
}

form {
  display: grid;
  gap: 0.95rem;
  margin-top: 1.5rem;
}

form > div {
  display: grid;
  gap: 0.45rem;
}

label {
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  font-weight: 510;
}

input,
textarea {
  width: 100%;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.028);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  padding: 0.8rem 0.9rem;
  font: inherit;
  resize: vertical;
  transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-subtle);
}

input:focus,
textarea:focus {
  background: rgba(255, 255, 255, 0.042);
  border-color: rgba(113, 112, 255, 0.72);
  box-shadow: 0 0 0 3px rgba(113, 112, 255, 0.18);
}

button {
  justify-self: start;
  min-height: 2.85rem;
  margin-top: 0.35rem;
  padding: 0.8rem 1.05rem;
  color: #ffffff;
  background: linear-gradient(180deg, var(--color-accent-hover), var(--color-accent-strong));
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-sm);
  box-shadow: 0 12px 30px rgba(94, 106, 210, 0.22);
  cursor: pointer;
  font: inherit;
  font-weight: 590;
}

button:hover {
  background: linear-gradient(180deg, #8f9aff, var(--color-accent));
}

button:disabled {
  cursor: wait;
  opacity: 0.72;
}

article {
  padding: 1rem 0;
  border-top: 1px solid var(--color-border-subtle);
}

article:first-of-type {
  margin-top: 1.2rem;
}

h3 {
  margin-bottom: 0.55rem;
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  font-weight: 590;
  letter-spacing: -0.01em;
}

ul,
ol {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--color-text-muted);
}

li + li {
  margin-top: 0.42rem;
}

[data-output="summary"] {
  margin-bottom: 0;
  color: var(--color-text-secondary);
}

[data-screen-gallery] {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

[data-generated-screen-card] {
  margin: 0;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
}

[data-generated-screen-card] img {
  display: block;
  width: 100%;
  height: auto;
}

[data-generated-screen-card] figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem;
  border-top: 1px solid var(--color-border-subtle);
}

[data-screen-download] {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.65rem 0.85rem;
  color: #ffffff;
  background: rgba(113, 112, 255, 0.16);
  border: 1px solid rgba(113, 112, 255, 0.36);
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 590;
}

[data-screen-empty][hidden] {
  display: none;
}

aside ol {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
  padding: 0;
  list-style: none;
}

aside li {
  padding: 0.85rem;
  color: var(--color-text-subtle);
  background: rgba(0, 0, 0, 0.16);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
}

[data-refinement-entry] {
  display: grid;
  gap: 0.55rem;
  color: var(--color-text-muted);
  border-style: solid;
}

[data-refinement-entry] button {
  display: grid;
  gap: 0.2rem;
  width: 100%;
  min-height: unset;
  margin: 0;
  padding: 0;
  color: var(--color-text-secondary);
  background: transparent;
  border: 0;
  box-shadow: none;
  text-align: left;
}

[data-refinement-entry] button:hover {
  color: var(--color-text);
  background: transparent;
}

[data-refinement-entry] span {
  font-size: 0.88rem;
  font-weight: 590;
}

[data-refinement-entry] small {
  color: var(--color-text-subtle);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

[data-refinement-entry] p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.82rem;
}

@media (max-width: 1180px) {
  header,
  main {
    width: min(100% - 2rem, 980px);
  }

  header {
    grid-template-columns: 1fr;
  }

  header dl {
    width: min(100%, 520px);
  }

  main {
    grid-template-columns: 1fr;
  }

  [data-section="brief-output"] {
    min-height: auto;
  }
}

@media (max-width: 640px) {
  header,
  main {
    width: min(100% - 1rem, 560px);
  }

  header {
    padding-top: 2.25rem;
  }

  header dl {
    grid-template-columns: 1fr;
  }

  [data-section] {
    border-radius: var(--radius-lg);
  }

  button {
    width: 100%;
  }
}