:root {
  --ink: #1c2421;
  --ink-soft: #3d4a44;
  --paper: #e8e2d8;
  --paper-deep: #d4ccc0;
  --mist: #f3efe8;
  --accent: #0f6e5c;
  --accent-deep: #0a4f42;
  --accent-glow: rgba(15, 110, 92, 0.28);
  --line: rgba(28, 36, 33, 0.12);
  --shadow: 0 28px 60px rgba(28, 36, 33, 0.18);
  --radius: 18px;
  --font-display: "Syne", sans-serif;
  --font-body: "Manrope", sans-serif;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--mist);
  line-height: 1.5;
  overflow-x: hidden;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 15% 10%, rgba(255, 255, 255, 0.7), transparent 55%),
    radial-gradient(ellipse 60% 45% at 90% 20%, rgba(15, 110, 92, 0.12), transparent 50%),
    radial-gradient(ellipse 70% 60% at 50% 100%, rgba(212, 204, 192, 0.9), transparent 55%),
    linear-gradient(165deg, #f7f3ec 0%, #e5ddd1 48%, #d9d2c6 100%);
}

.atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
  pointer-events: none;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.5rem;
  max-width: 1180px;
  margin: 0 auto;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.brand-dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
  animation: pulse-dot 2.8s ease-in-out infinite;
}

.topbar-note {
  font-size: 0.78rem;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

.stage {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem 3.5rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 400px);
  gap: 2rem 2.5rem;
  align-items: start;
  padding: 1rem 0 2rem;
}

.hero-copy {
  min-width: 0;
  padding-top: 1.5rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.brand-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3rem, 7.2vw, 5.2rem);
  line-height: 0.92;
  letter-spacing: -0.045em;
  color: var(--ink);
  animation: rise-in 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}

[hidden] {
  display: none !important;
}

.lede {
  margin: 1.25rem 0 0;
  max-width: 32rem;
  font-size: clamp(1.02rem, 2vw, 1.18rem);
  color: var(--ink-soft);
  animation: rise-in 1s 0.08s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.85rem;
  animation: rise-in 1s 0.16s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.9rem 1.45rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease,
    border-color 0.2s ease;
}

.btn.primary {
  background: var(--accent);
  color: #f7faf8;
  box-shadow: 0 12px 28px var(--accent-glow);
}

.btn.primary:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
}

.btn.ghost {
  background: rgba(255, 255, 255, 0.45);
  border-color: var(--line);
  color: var(--ink);
  backdrop-filter: blur(8px);
}

.btn.ghost:hover {
  background: rgba(255, 255, 255, 0.7);
  transform: translateY(-1px);
}

.preview-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: float-in 1.1s 0.12s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.preview-frame {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(180deg, #efe9df, #ddd5c8);
  box-shadow: var(--shadow);
  aspect-ratio: 1036 / 1844;
  max-height: min(78vh, 820px);
  margin-inline: auto;
  width: min(100%, 420px);
  cursor: grab;
  touch-action: none;
}

.preview-frame.is-dragging {
  cursor: grabbing;
}

.preview-frame canvas {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.preview-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(243, 239, 232, 0.2), rgba(28, 36, 33, 0.08));
}

.preview-empty p {
  margin: 0;
  padding: 0.65rem 1rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink-soft);
  font-size: 0.9rem;
  font-weight: 600;
  backdrop-filter: blur(6px);
}

.preview-empty {
  flex-direction: column;
  gap: 0.55rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1rem;
}

.hint-3d {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-soft);
  opacity: 0.85;
}

.preview-frame.has-art .preview-empty,
.preview-empty[hidden] {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.preview-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.7rem;
}

.status {
  margin: 0;
  text-align: center;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-deep);
  min-height: 1.2em;
}

.controls {
  padding: 1rem 1.05rem 1.1rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.48);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  animation: rise-in 0.55s ease both;
}

.controls h2 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: -0.03em;
}

.controls-note {
  margin: 0 0 0.85rem;
  font-size: 0.78rem;
  color: var(--ink-soft);
  line-height: 1.35;
}

.sliders {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 0.9rem;
}

.sliders label {
  display: grid;
  gap: 0.45rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.sliders input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem 2rem;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float-in {
  from {
    opacity: 0;
    transform: translateY(28px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes pulse-dot {
  0%,
  100% {
    box-shadow: 0 0 0 4px var(--accent-glow);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(15, 110, 92, 0.12);
  }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    gap: 1.75rem;
    padding-top: 0.5rem;
  }

  .preview-panel {
    order: -1;
  }

  .preview-frame {
    width: min(100%, 360px);
    max-height: 62vh;
  }

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

@media (max-width: 560px) {
  .topbar {
    padding-inline: 1rem;
  }

  .stage {
    padding-inline: 1rem;
  }

  .brand-title {
    font-size: clamp(2.8rem, 14vw, 3.8rem);
  }

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