:root {
  --studio-bg: radial-gradient(circle at top left, #020617 0%, #020617 40%, #020617 70%, #000 100%);
  --transition-speed: .3s;
  --glass-surface: rgba(15, 23, 42, .72);
  --glass-surface-soft: rgba(15, 23, 42, .62);
  --glass-surface-light: rgba(255, 255, 255, .08);
  --glass-border-strong: rgba(148, 163, 184, .5);
  --glass-border-soft: rgba(148, 163, 184, .22);
  --glass-shadow-soft: 0 22px 45px rgba(15, 23, 42, .65);
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, .25);
  --accent-strong: #4f46e5;
  --neon-box-bg: rgba(15, 23, 42, .85);
  --neon-box-border: rgba(37, 99, 235, .3);
  --tool-tile-bg: rgba(15, 23, 42, .75)
}

html.dark {
  --studio-bg: radial-gradient(circle at top left, #020617 0%, #020617 40%, #020617 70%, #000 100%);
  --glass-surface: rgba(15, 23, 42, .78);
  --glass-surface-soft: rgba(15, 23, 42, .68);
  --glass-surface-light: rgba(15, 23, 42, .92);
  --glass-border-strong: rgba(148, 163, 184, .55);
  --glass-border-soft: rgba(148, 163, 184, .28);
  --glass-shadow-soft: 0 28px 60px rgba(15, 23, 42, .85);
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, .3);
  --accent-strong: #4f46e5;
  --neon-box-bg: rgba(15, 23, 42, .9);
  --neon-box-border: rgba(37, 99, 235, .45);
  --tool-tile-bg: rgba(15, 23, 42, .88)
}

body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--studio-bg);
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition-speed) ease;
  margin: 0;
  line-height: 1.6
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(37, 99, 235, .12), transparent 40%), radial-gradient(circle at 80% 70%, rgba(79, 70, 229, .08), transparent 45%);
  z-index: -1;
  pointer-events: none
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px 16px
}

@media (min-width: 768px) {
  .container {
    padding: 80px 24px;
  }
}

h1 {
  font-size: clamp(2.4rem, 4vw, 3.2rem);
  letter-spacing: -.02em;
  font-weight: 700
}

.subtitle {
  opacity: .85;
  margin-top: 12px;
  font-weight: 400
}

.upload-box {
  background: linear-gradient(180deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .02));
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 20px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform .25s ease, box-shadow .25s ease
}

.upload-box:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(37, 99, 235, .35), 0 0 40px rgba(37, 99, 235, .15)
}

.glass-surface {
  background: var(--glass-surface);
  border: 1px solid var(--glass-border-soft);
  box-shadow: var(--glass-shadow-soft);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px)
}

.glass-surface-soft {
  background: var(--glass-surface-soft);
  border: 1px solid var(--glass-border-soft);
  box-shadow: 0 14px 32px rgba(15, 23, 42, .55);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px)
}

.glass-button-primary {
  background: radial-gradient(circle at top left, var(--accent-strong), var(--accent));
  border: 1px solid rgba(191, 219, 254, .5);
  box-shadow: 0 12px 30px rgba(79, 70, 229, .55)
}

.glass-button-primary:hover {
  box-shadow: 0 18px 40px rgba(79, 70, 229, .7);
  transform: translateY(-1px)
}

.trust-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 24px;
  font-size: 12px;
  font-weight: 500;
  color: rgba(255, 255, 255, .4);
  text-transform: uppercase;
  letter-spacing: .05em
}

.trust-row span {
  display: flex;
  align-items: center;
  gap: 6px
}

.hint {
  font-size: 14px;
  color: rgba(255, 255, 255, .5);
  margin-top: 32px;
  max-width: 400px;
  margin-inline: auto;
  line-height: 1.5
}