:root {
  color-scheme: dark;
  --bg: #0a0a0a;
  --canvas-bg: #08080a;
  --surface: #111113;
  --surface-soft: #18181b;
  --surface-raised: #1c1c1f;
  --line: #26262a;
  --line-strong: #34343a;
  --text: #fafafa;
  --text-soft: #e4e4e7;
  --muted: #a1a1aa;
  --muted-strong: #d4d4d8;
  --focus: #525252;
  --primary-bg: #fafafa;
  --primary-bg-hover: #ffffff;
  --primary-text: #0a0a0a;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html, body {
  margin: 0;
  background: var(--bg);
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-feature-settings: "ss01", "cv11";
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  height: 100vh;
  width: 100%;
}

/* ====================================================================
   Left: canvas (mesh hero)
   ==================================================================== */

.canvas {
  position: relative;
  overflow: hidden;
  background: var(--canvas-bg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(28px, 4vw, 48px);
  isolation: isolate;
}

.canvas-mesh {
  position: absolute;
  inset: -10%;
  z-index: -2;
  background:
    radial-gradient(ellipse 60% 50% at 18% 22%, rgba(232, 200, 168, 0.22), transparent 60%),
    radial-gradient(ellipse 50% 60% at 82% 30%, rgba(150, 170, 210, 0.18), transparent 65%),
    radial-gradient(ellipse 70% 55% at 30% 90%, rgba(200, 180, 220, 0.16), transparent 60%),
    radial-gradient(ellipse 55% 45% at 78% 88%, rgba(170, 210, 200, 0.12), transparent 60%),
    linear-gradient(135deg, #0d0d10 0%, #08080a 60%, #0a0a0c 100%);
  filter: blur(40px) saturate(115%);
  animation: meshDrift 32s ease-in-out infinite alternate;
}

@keyframes meshDrift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(-2%, 1%, 0) scale(1.05); }
  100% { transform: translate3d(2%, -1%, 0) scale(1.02); }
}

.canvas-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  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: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 70% at 30% 50%, black 30%, transparent 90%);
}

.canvas::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    radial-gradient(ellipse at 100% 50%, rgba(0, 0, 0, 0.55), transparent 55%),
    linear-gradient(180deg, transparent 70%, rgba(0, 0, 0, 0.4));
}

.canvas-content {
  margin-top: auto;
  display: grid;
  gap: 14px;
  max-width: 520px;
}

.canvas-eyebrow {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.canvas-lockup {
  display: flex;
  align-items: center;
  gap: clamp(20px, 2.5vw, 32px);
}

.canvas-mark {
  width: clamp(54px, 7vw, 88px);
  height: clamp(54px, 7vw, 88px);
  color: var(--text);
  flex-shrink: 0;
  filter: drop-shadow(0 4px 24px rgba(255, 255, 255, 0.08));
}

.canvas-wordmark {
  margin: 0;
  font-size: clamp(4rem, 11vw, 9rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.045em;
  color: var(--text);
  background: linear-gradient(180deg, #ffffff 0%, #c7c7cc 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 4px 50px rgba(255, 255, 255, 0.08);
}

.canvas-version {
  display: inline-flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 8px;
}

.canvas-version-number {
  font-family: var(--mono);
  font-size: clamp(0.95rem, 1.6vw, 1.15rem);
  font-weight: 600;
  color: var(--text-soft);
  letter-spacing: -0.01em;
}

.canvas-channel {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 500;
}

.canvas-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  margin-top: 24px;
}

.canvas-footer-label::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--muted-strong);
  margin-right: 8px;
  vertical-align: middle;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.4);
}

/* ====================================================================
   Right: content
   ==================================================================== */

.content {
  display: flex;
  flex-direction: column;
  gap: clamp(24px, 3vh, 32px);
  padding: clamp(28px, 4vw, 56px);
  background: var(--bg);
  overflow-y: auto;
}

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

.content-brand-text {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.content-eyebrow {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.content-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.logout-button {
  min-height: 32px;
  height: 32px;
  padding: 0 12px;
  border-radius: 8px;
  background: transparent;
  color: var(--muted-strong);
  border: 1px solid var(--line);
  font-size: 0.84rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease;
}

.logout-button:hover {
  border-color: var(--line-strong);
  color: var(--text);
  background: var(--surface-soft);
}

.content-section {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 460px;
  width: 100%;
  margin-top: clamp(8px, 4vh, 32px);
}

.content-lede {
  margin: 0 0 8px;
  color: var(--muted-strong);
  font-size: 1.02rem;
  line-height: 1.5;
}

/* --- Login form --- */

.form label {
  display: block;
  margin: 4px 0 8px;
  color: var(--text-soft);
  font-weight: 500;
  font-size: 0.86rem;
}

.inline {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

input,
button,
a.primary,
a.secondary {
  min-height: 44px;
  border-radius: 10px;
  font: inherit;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  padding: 0 14px;
}

input::placeholder {
  color: var(--muted);
}

input:focus-visible,
button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--muted-strong);
  outline-offset: 2px;
}

button,
a.primary,
a.secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  padding: 0 16px;
  font-family: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease;
}

#login-form button[type="submit"] {
  background: var(--primary-bg);
  color: var(--primary-text);
  border: 0;
}

#login-form button[type="submit"]:hover {
  background: var(--primary-bg-hover);
}

/* --- Release section --- */

.release-version-row {
  display: inline-flex;
  align-items: baseline;
  gap: 18px;
  flex-wrap: wrap;
  margin: 4px 0 4px;
}

.version-number {
  font-size: clamp(2.4rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1;
  color: var(--text);
}

.version-channel {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.86rem;
  font-weight: 500;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted-strong);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.06);
}

.release-section .primary {
  width: 100%;
  min-height: 54px;
  background: var(--primary-bg);
  color: var(--primary-text);
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.98rem;
  gap: 14px;
}

.release-section .primary:hover {
  background: var(--primary-bg-hover);
}

.primary-label {
  font-weight: 600;
}

.primary-meta {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(10, 10, 10, 0.55);
  padding: 4px 8px;
  border-radius: 5px;
  background: rgba(10, 10, 10, 0.08);
}

.release-fineprint {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

.release-fineprint code {
  font-family: var(--mono);
  font-size: 0.86em;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  color: var(--text-soft);
}

/* --- Meta list --- */

.release-meta-list {
  margin: 8px 0 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.meta-row {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.meta-row--sha {
  grid-template-columns: 110px 1fr;
  align-items: start;
}

.meta-label {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  line-height: 1.6;
}

.meta-value {
  margin: 0;
  color: var(--text);
  font-size: 0.94rem;
  font-weight: 500;
  overflow-wrap: anywhere;
}

.meta-value.mono {
  font-family: var(--mono);
  font-size: 0.88rem;
  font-weight: 500;
}

.meta-row--sha .meta-value {
  display: grid;
  gap: 8px;
}

.meta-row--sha code {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-soft);
  padding: 9px 10px;
  border-radius: 7px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: block;
}

.meta-row--sha code[data-empty="true"] {
  color: var(--muted);
}

.copy-button {
  min-height: 30px;
  height: 30px;
  padding: 0 12px;
  border-radius: 7px;
  background: transparent;
  color: var(--text-soft);
  border: 1px solid var(--line);
  font-size: 0.78rem;
  font-weight: 500;
  font-family: inherit;
  justify-self: end;
  cursor: pointer;
}

.copy-button:hover:not(:disabled) {
  border-color: var(--line-strong);
  color: var(--text);
  background: var(--surface-soft);
}

.copy-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.copy-button.is-copied {
  background: var(--primary-bg);
  color: var(--primary-text);
  border-color: var(--primary-bg);
}

/* --- Extras (advanced + source) --- */

.release-extras {
  display: grid;
  gap: 14px;
  margin-top: 4px;
}

.advanced-downloads {
  display: grid;
  gap: 10px;
}

.advanced-downloads summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.86rem;
  font-weight: 500;
  width: fit-content;
}

.advanced-downloads summary::-webkit-details-marker {
  display: none;
}

.advanced-downloads summary::before {
  content: "›";
  display: inline-block;
  color: var(--muted);
  transition: transform 120ms ease;
}

.advanced-downloads[open] summary::before {
  transform: rotate(90deg);
}

.advanced-downloads a.secondary {
  width: 100%;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
  min-height: 42px;
}

.advanced-downloads a.secondary:hover {
  border-color: var(--line-strong);
  background: var(--surface-soft);
}

.action-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.5;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-soft);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  width: fit-content;
}

.text-link:hover {
  color: var(--text);
}

.text-link-arrow {
  color: var(--muted);
  font-size: 0.92em;
}

.status {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.status:empty {
  display: none;
}

/* --- History --- */

.release-history {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 12px;
}

.history-summary {
  list-style: none;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  width: 100%;
}

.history-summary::-webkit-details-marker {
  display: none;
}

.history-summary::before {
  content: "›";
  display: inline-block;
  color: var(--muted);
  margin-right: 6px;
  transition: transform 120ms ease;
}

.release-history[open] .history-summary::before {
  transform: rotate(90deg);
}

.history-title {
  flex: 1;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.005em;
}

.history-count {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.history-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.history-empty {
  padding: 12px 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.history-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid transparent;
  transition: background-color 120ms ease, border-color 120ms ease;
}

.history-row:hover {
  background: var(--surface-soft);
  border-color: var(--line);
}

.history-info {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-width: 0;
}

.history-version {
  font-family: var(--mono);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}

.history-date {
  color: var(--muted);
  font-size: 0.82rem;
}

.history-actions {
  display: inline-flex;
  gap: 6px;
}

.history-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 6px;
  background: var(--primary-bg);
  color: var(--primary-text);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease;
}

.history-action:hover {
  background: var(--primary-bg-hover);
}

.history-action--ghost {
  background: transparent;
  color: var(--text-soft);
  border-color: var(--line);
}

.history-action--ghost:hover {
  background: var(--surface-soft);
  border-color: var(--line-strong);
  color: var(--text);
}

/* ====================================================================
   Responsive
   ==================================================================== */

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(220px, 32vh) 1fr;
    height: auto;
    min-height: 100vh;
  }

  .content {
    overflow-y: visible;
  }

  .canvas {
    padding: 24px;
  }

  .canvas-wordmark {
    font-size: clamp(3rem, 14vw, 5rem);
  }

  .canvas-content {
    margin-top: auto;
  }

  .canvas-footer {
    display: none;
  }

  .content {
    padding: 24px;
  }

  .content-section {
    max-width: none;
  }

  .meta-row {
    grid-template-columns: 90px 1fr;
  }
}

@media (max-width: 480px) {
  .meta-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

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