/* ============================================================
   LUMEN — design tokens (ui-ux-pro-max: "Modern Dark Cinema")
   Style: glassmorphism on deep indigo-black, ambient light,
          motion-driven accents. Type: Space Grotesk / Inter.
   Palette: AI purple #7C3AED · indigo #6366F1 · pink #EC4899
   ============================================================ */
:root {
  --bg: #07071a;            /* deep indigo-black, never pure #000 */
  --bg-deep: #0b0b20;
  --text: #eceef8;
  --text-dim: #9aa0bd;
  --primary: #7c3aed;
  --primary-soft: #a78bfa;
  --secondary: #6366f1;
  --accent: #ec4899;
  --accent-soft: #f9a8d4;
  --cyan: #22d3ee;
  --success: #34d399;
  --error: #f87171;
  --glass: rgba(255, 255, 255, 0.055);
  --glass-strong: rgba(23, 23, 46, 0.85);
  --glass-border: rgba(255, 255, 255, 0.12);
  --blur: 18px;
  --radius: 20px;
  --radius-sm: 12px;
  --space-1: 8px; --space-2: 16px; --space-3: 24px;
  --space-4: 32px; --space-5: 48px; --space-6: 64px; --space-7: 96px;
  --dur: 250ms;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);       /* expo.out */
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1); /* overshoot for modals */
  --grad: linear-gradient(120deg, var(--primary-soft), var(--accent));
  --grad-full: linear-gradient(120deg, #a78bfa, #ec4899 55%, #22d3ee);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { color-scheme: dark; scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, legend, .logo, .cta, .dim, .flow-name {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
}

img { max-width: 100%; display: block; }
button { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--accent-soft);
  outline-offset: 3px;
  border-radius: 4px;
}

/* press feedback (skill: scale 0.97 on press) */
.cta:active, .ghost-btn:active, .icon-btn:active,
.flow-body:active, .chip-row span:active, .account-btn:active {
  transform: scale(0.97);
}

/* ---------- ambient light backdrop ---------- */
.aurora {
  position: fixed; inset: 0;
  z-index: -1;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(124, 58, 237, 0.15), transparent 60%),
    var(--bg);
}
.aurora-blob {
  position: absolute;
  width: 55vmax; height: 55vmax;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  will-change: transform;
}
.aurora-a {
  background: radial-gradient(circle, rgba(124, 58, 237, 0.35), transparent 65%);
  top: -20vmax; left: -12vmax;
  animation: drift-a 26s var(--ease) infinite alternate;
}
.aurora-b {
  background: radial-gradient(circle, rgba(236, 72, 153, 0.18), transparent 65%);
  bottom: -25vmax; right: -15vmax;
  animation: drift-b 32s var(--ease) infinite alternate;
}
.aurora-c {
  background: radial-gradient(circle, rgba(99, 102, 241, 0.2), transparent 65%);
  top: 30%; left: 45%;
  animation: drift-c 40s var(--ease) infinite alternate;
}
@keyframes drift-a { to { transform: translate(14vmax, 10vmax) scale(1.15); } }
@keyframes drift-b { to { transform: translate(-12vmax, -8vmax) scale(1.2); } }
@keyframes drift-c { to { transform: translate(-10vmax, 6vmax) scale(0.85); } }

.grain {
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: 0.04;
  mix-blend-mode: overlay;
}

/* ---------- glass primitives ---------- */
.glass {
  background: var(--glass);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
}
.glass-strong {
  background: var(--glass-strong);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
}

/* ---------- header ---------- */
.site-header {
  position: sticky; top: var(--space-2);
  z-index: 10;
  max-width: 1080px;
  margin: var(--space-2) auto 0;
  padding: 12px var(--space-3);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-2);
}
.logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 22px; font-weight: 700;
  color: var(--text); text-decoration: none;
  letter-spacing: 0.02em;
}
.logo-mark { width: 28px; height: 28px; }
.header-right { display: inline-flex; align-items: center; gap: 12px; }
.gpu-chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text-dim);
  padding: 8px 14px;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.25);
  white-space: nowrap;
}
.gpu-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--text-dim);
  transition: background var(--dur);
}
.gpu-chip.online .gpu-dot { background: var(--success); box-shadow: 0 0 8px var(--success); }
.gpu-chip.offline .gpu-dot { background: var(--error); }

.account-btn {
  min-height: 44px;
  padding: 0 18px;
  font-size: 14px; font-weight: 600;
  color: var(--text);
  background: rgba(124, 58, 237, 0.2);
  border: 1px solid rgba(167, 139, 250, 0.45);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--dur), border-color var(--dur), transform var(--dur) var(--ease);
  max-width: 220px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.account-btn:hover { background: rgba(124, 58, 237, 0.35); border-color: var(--primary-soft); }

/* ---------- hero ---------- */
main { max-width: 1080px; margin: 0 auto; padding: 0 var(--space-3); }

.hero { text-align: center; padding: var(--space-6) 0 var(--space-5); }
.hero-kicker {
  display: inline-block;
  min-height: 22px;
  font-size: 13px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: var(--space-2);
}
.hero h1 {
  font-size: clamp(40px, 7vw, 76px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.grad-text {
  background: var(--grad-full);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.grad-text-soft { color: var(--primary-soft); }
.hero-sub {
  margin-top: var(--space-3);
  color: var(--text-dim);
  font-size: clamp(16px, 2vw, 19px);
}

/* ---------- studio card ---------- */
.studio {
  padding: var(--space-4);
  box-shadow: 0 30px 80px rgba(3, 3, 16, 0.6);
}
.stage { animation: rise 400ms var(--ease); }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } }
.hidden { display: none !important; }

/* dropzone */
.dropzone {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 6px;
  min-height: 320px;
  border: 2px dashed rgba(167, 139, 250, 0.35);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--dur), background var(--dur), transform var(--dur) var(--ease);
  text-align: center;
  padding: var(--space-4);
}
.dropzone:hover, .dropzone:focus-visible, .dropzone.dragover {
  border-color: var(--accent);
  background: rgba(236, 72, 153, 0.05);
}
.dropzone.dragover { transform: scale(1.01); }
.drop-icon { width: 52px; height: 52px; color: var(--primary-soft); margin-bottom: var(--space-2); }
.drop-title { font-size: 22px; font-weight: 600; font-family: 'Space Grotesk', sans-serif; }
.drop-hint { color: var(--text-dim); }
.link-ish { color: var(--accent-soft); text-decoration: underline; text-underline-offset: 3px; }
.drop-meta { margin-top: var(--space-2); font-size: 13px; color: var(--text-dim); opacity: 0.8; }

/* config */
.config-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(300px, 4fr);
  gap: var(--space-4);
}
.preview-wrap {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-deep);
  align-self: start;
}
.preview-wrap img { width: 100%; max-height: 500px; object-fit: contain; }
.preview-badge {
  position: absolute; left: 10px; bottom: 10px;
  font-size: 12px; font-weight: 500;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
  border: 1px solid var(--glass-border);
}
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.5);
  color: var(--text);
  cursor: pointer;
  transition: background var(--dur), transform var(--dur) var(--ease);
}
.icon-btn:hover { background: rgba(248, 113, 113, 0.25); }
.icon-btn svg { width: 18px; height: 18px; }
.preview-clear { position: absolute; top: 10px; right: 10px; }

.controls { display: flex; flex-direction: column; gap: var(--space-3); }
fieldset { border: 0; }
legend {
  font-size: 13px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: var(--space-2);
}

/* flow cards */
.flow-cards { display: grid; gap: 10px; }
.flow-card input { position: absolute; opacity: 0; pointer-events: none; }
.flow-body {
  display: grid;
  grid-template-columns: 40px 1fr;
  grid-template-areas: "icon name" "icon desc";
  column-gap: 14px; row-gap: 2px;
  align-items: center;
  padding: 13px 16px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
  transition: border-color var(--dur), background var(--dur), box-shadow var(--dur), transform var(--dur) var(--ease);
  min-height: 44px;
}
.flow-icon {
  grid-area: icon;
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border-radius: 12px;
  transition: transform var(--dur) var(--ease);
}
.flow-icon svg { width: 22px; height: 22px; }
.flow-icon-enlarge { background: rgba(124, 58, 237, 0.18); color: var(--primary-soft); }
.flow-icon-purify  { background: rgba(236, 72, 153, 0.15); color: var(--accent-soft); }
.flow-icon-cutout  { background: rgba(34, 211, 238, 0.12); color: var(--cyan); }
.flow-name { grid-area: name; font-weight: 600; }
.flow-desc { grid-area: desc; font-size: 13px; color: var(--text-dim); }
.flow-card input:checked + .flow-body {
  border-color: var(--primary-soft);
  background: rgba(124, 58, 237, 0.13);
  box-shadow: 0 0 0 1px var(--primary-soft), 0 8px 24px rgba(124, 58, 237, 0.18);
}
.flow-card input:checked + .flow-body .flow-icon { transform: scale(1.08); }
.flow-card input:focus-visible + .flow-body { outline: 2px solid var(--accent-soft); outline-offset: 2px; }
.flow-body:hover { border-color: rgba(167, 139, 250, 0.5); }

/* chip rows (model + scale) */
.chip-row {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.chip-row label { position: relative; }
.chip-row input { position: absolute; opacity: 0; pointer-events: none; }
.chip-row span {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  font-size: 14px; font-weight: 600;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-dim);
  cursor: pointer;
  transition: background var(--dur), color var(--dur), border-color var(--dur), transform var(--dur) var(--ease);
}
.chip-row span:hover { border-color: rgba(167, 139, 250, 0.5); }
.chip-row input:checked + span {
  background: var(--grad);
  border-color: transparent;
  color: #14061f;
}
.chip-row input:focus-visible + span { outline: 2px solid var(--accent-soft); outline-offset: 2px; }
.scale-note { margin-top: 10px; font-size: 13px; color: var(--text-dim); font-variant-numeric: tabular-nums; }

/* CTA */
.cta {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 52px;
  padding: 0 var(--space-4);
  font-size: 17px; font-weight: 700;
  color: #14061f;
  background: var(--grad);
  border: 0; border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur), opacity var(--dur);
  box-shadow: 0 8px 28px rgba(124, 58, 237, 0.35);
}
.cta:hover { transform: translateY(-2px); box-shadow: 0 12px 36px rgba(236, 72, 153, 0.35); }
.cta:disabled { opacity: 0.55; cursor: wait; transform: none; }
.cta svg { width: 20px; height: 20px; }
.cta.wide { width: 100%; }
.cta.loading span { opacity: 0.6; }

.ghost-btn {
  min-height: 52px;
  padding: 0 var(--space-3);
  font-size: 15px; font-weight: 500;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--dur), border-color var(--dur), transform var(--dur) var(--ease);
}
.ghost-btn:hover { background: rgba(255, 255, 255, 0.09); border-color: var(--primary-soft); }
.ghost-btn.wide { width: 100%; }

.text-link {
  margin-top: var(--space-2);
  background: none; border: 0;
  color: var(--accent-soft);
  font-size: 14px;
  cursor: pointer;
  text-decoration: underline; text-underline-offset: 3px;
  min-height: 44px;
}

/* processing */
.work-wrap { display: flex; flex-direction: column; align-items: center; gap: var(--space-2); }
.work-preview {
  position: relative;
  max-width: 520px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-deep);
}
.work-preview img { max-height: 380px; object-fit: contain; opacity: 0.85; }
.scanline {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom,
    transparent 0%, transparent 42%,
    rgba(236, 72, 153, 0.06) 46%,
    rgba(236, 72, 153, 0.55) 50%,
    rgba(236, 72, 153, 0.06) 54%,
    transparent 58%, transparent 100%);
  background-size: 100% 300%;
  animation: scan 2.2s linear infinite;
  mix-blend-mode: screen;
}
@keyframes scan {
  from { background-position: 0 -100%; }
  to   { background-position: 0 200%; }
}
.work-status { font-size: 18px; font-weight: 600; font-family: 'Space Grotesk', sans-serif; }
.work-timer { font-size: 14px; color: var(--text-dim); font-variant-numeric: tabular-nums; }

/* result: before/after compare */
.compare {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-deep);
  user-select: none;
  touch-action: none;
}
.compare img {
  width: 100%;
  max-height: 560px;
  object-fit: contain;
  pointer-events: none;
}
/* checkerboard: shows through transparent cut-out results */
.compare.transparent .compare-after-wrap {
  background:
    conic-gradient(rgba(255,255,255,0.14) 90deg, transparent 90deg 180deg,
                   rgba(255,255,255,0.14) 180deg 270deg, transparent 270deg)
    0 0 / 22px 22px;
}
.compare-before-clip {
  position: absolute; inset: 0;
  clip-path: inset(0 50% 0 0);
  background: var(--bg-deep);
}
.compare-before-clip img {
  width: 100%; height: 100%;
  max-height: 560px;
  object-fit: contain;
}
.compare-handle {
  position: absolute; top: 0; bottom: 0; left: 50%;
  width: 44px;
  margin-left: -22px;
  cursor: ew-resize;
  display: flex; align-items: center; justify-content: center;
}
.handle-line {
  position: absolute; top: 0; bottom: 0; left: 50%;
  width: 2px; margin-left: -1px;
  background: var(--grad);
  box-shadow: 0 0 12px rgba(236, 72, 153, 0.7);
}
.handle-knob {
  position: relative;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(7, 7, 26, 0.75);
  backdrop-filter: blur(8px);
  border: 1.5px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  color: var(--text);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.5);
}
.handle-knob svg { width: 20px; height: 20px; }
.compare-tag {
  position: absolute; top: 12px;
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
  border: 1px solid var(--glass-border);
}
.tag-before { left: 12px; }
.tag-after { right: 12px; color: var(--accent-soft); border-color: rgba(236, 72, 153, 0.4); }

.result-bar {
  margin-top: var(--space-3);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.dim-badges { display: inline-flex; align-items: center; gap: 12px; }
.dim {
  font-size: 14px; font-weight: 600;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}
.dim-after { color: var(--accent-soft); border-color: rgba(236, 72, 153, 0.4); }
.dim-arrow { width: 18px; height: 18px; color: var(--text-dim); }
.result-actions { display: inline-flex; gap: 12px; }

.error-note {
  margin-top: var(--space-3);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid rgba(248, 113, 113, 0.4);
  color: #fecaca;
  font-size: 15px;
}

/* gallery */
.gallery { margin-top: var(--space-5); }
.gallery h2 {
  font-size: 15px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: var(--space-2);
}
.gallery-strip {
  display: flex; gap: 12px;
  overflow-x: auto;
  padding-bottom: 6px;
}
.gallery-strip a {
  flex: 0 0 auto;
  width: 108px; height: 108px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  transition: transform var(--dur) var(--ease), border-color var(--dur);
}
.gallery-strip a:hover { transform: translateY(-3px); border-color: var(--accent); }
.gallery-strip img { width: 100%; height: 100%; object-fit: cover; }

/* features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-3);
  margin: var(--space-6) 0;
}
.feature { padding: var(--space-4); }
.feature svg { width: 30px; height: 30px; color: var(--primary-soft); margin-bottom: var(--space-2); }
.feature h3 { font-size: 18px; margin-bottom: 8px; }
.feature p { color: var(--text-dim); font-size: 15px; }

/* scroll-reveal stagger (skill: grid stagger, 300-450ms) */
.stagger > * {
  opacity: 0;
  transform: translateY(16px) scale(0.96);
  transition: opacity 400ms var(--ease), transform 400ms var(--ease);
}
.stagger.revealed > * { opacity: 1; transform: none; }
.stagger.revealed > *:nth-child(1) { transition-delay: 0ms; }
.stagger.revealed > *:nth-child(2) { transition-delay: 70ms; }
.stagger.revealed > *:nth-child(3) { transition-delay: 140ms; }
.stagger.revealed > *:nth-child(4) { transition-delay: 210ms; }

/* footer */
.site-footer {
  text-align: center;
  padding: var(--space-4) 0 var(--space-5);
  color: var(--text-dim);
  font-size: 14px;
}

/* ---------- auth modal ---------- */
.modal-backdrop {
  position: fixed; inset: 0;
  z-index: 50;
  background: rgba(3, 3, 16, 0.7);
  backdrop-filter: blur(6px);
  display: flex;
  overflow-y: auto;
  padding: var(--space-3);
  animation: fade-in 200ms var(--ease);
}
@keyframes fade-in { from { opacity: 0; } }
.modal {
  position: relative;
  margin: auto; /* centers, but never clips when taller than the viewport */
  width: 100%; max-width: 420px;
  padding: var(--space-4);
  animation: pop-in 340ms var(--spring);
}
@keyframes pop-in {
  from { opacity: 0; transform: scale(0.92) translateY(12px); }
}
.modal-close { position: absolute; top: 14px; right: 14px; width: 40px; height: 40px; }
.modal h2 { font-size: 24px; margin-bottom: var(--space-2); padding-right: 40px; }
.view-sub { color: var(--text-dim); font-size: 15px; margin-bottom: var(--space-3); }

.gate-note {
  margin-bottom: var(--space-3);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(236, 72, 153, 0.45);
  background: rgba(236, 72, 153, 0.12);
  color: var(--accent-soft);
  font-size: 14px; font-weight: 500;
}

.auth-tabs {
  display: grid; grid-template-columns: 1fr 1fr;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: var(--space-3);
}
.auth-tab {
  min-height: 44px;
  border: 0; background: transparent;
  color: var(--text-dim);
  font-size: 14px; font-weight: 600;
  cursor: pointer;
  transition: background var(--dur), color var(--dur);
}
.auth-tab.active { background: rgba(124, 58, 237, 0.3); color: var(--text); }

.field { margin-bottom: var(--space-2); text-align: left; }
.field label {
  display: block;
  font-size: 13px; font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.field input {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  font-size: 16px;
  color: var(--text);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--dur), box-shadow var(--dur);
}
.field input:focus {
  outline: none;
  border-color: var(--primary-soft);
  box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.25);
}
.field input.invalid { border-color: var(--error); }
.field-hint { font-size: 13px; color: var(--text-dim); margin-top: 6px; }
.field-err, .form-err {
  font-size: 13px; color: #fecaca;
  margin-top: 6px;
  min-height: 0;
}
.form-err { margin-bottom: var(--space-2); }
.field-err:empty, .form-err:empty { display: none; }

.pw-wrap { position: relative; }
.pw-wrap input { padding-right: 52px; }
.pw-toggle {
  position: absolute; top: 50%; right: 4px;
  transform: translateY(-50%);
  width: 44px; height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  background: none; border: 0;
  color: var(--text-dim);
  cursor: pointer;
  border-radius: 50%;
}
.pw-toggle:hover { color: var(--text); }
.pw-toggle svg { width: 20px; height: 20px; }

.auth-view { text-align: center; }
.auth-view form { text-align: left; }
.notice-icon {
  width: 64px; height: 64px;
  margin: 0 auto var(--space-2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(124, 58, 237, 0.18);
  color: var(--primary-soft);
}
.notice-icon svg { width: 30px; height: 30px; }

/* toast */
.toast {
  position: fixed;
  left: 50%; bottom: 28px;
  transform: translate(-50%, 20px);
  z-index: 60;
  max-width: min(420px, 90vw);
  padding: 12px 20px;
  border-radius: 999px;
  background: rgba(23, 23, 46, 0.95);
  border: 1px solid var(--glass-border);
  color: var(--text);
  font-size: 14px; font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur), transform var(--dur) var(--ease);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .config-grid { grid-template-columns: 1fr; }
  .hero { padding-top: var(--space-5); }
  .studio { padding: var(--space-3); }
  .result-bar { justify-content: center; }
  .gpu-chip { display: none; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .aurora-blob { animation: none; }
  .scanline { animation-duration: 6s; }
  .stage, .modal, .modal-backdrop { animation: none; }
  .stagger > * { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .cta, .cta:hover { transform: none; }
}