:root {
  color-scheme: dark;

  --bg: #08080d;
  --bg-soft: #0c0c14;
  --surface: rgba(255, 255, 255, 0.03);
  --surface-raised: rgba(255, 255, 255, 0.045);
  --surface-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --border-focus: rgba(180, 130, 255, 0.65);

  --text: #f4f0ff;
  --text-muted: #a49fc3;
  --text-dim: #6c6689;
  --text-inverse: #0a0a10;

  --accent: #a855f7;
  --accent-soft: #c084fc;
  --accent-hot: #f472b6;
  --accent-deep: #6d28d9;
  --accent-glow: rgba(168, 85, 247, 0.45);
  --accent-glow-hot: rgba(244, 114, 182, 0.35);

  --danger: #ff5d7a;

  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 28px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.45);
  --shadow-md: 0 16px 32px -18px rgba(0, 0, 0, 0.75);
  --shadow-lg: 0 40px 80px -30px rgba(0, 0, 0, 0.85);
  --shadow-glow: 0 20px 60px -16px var(--accent-glow);

  --font-display: "Fraunces", "Source Serif 4", "Times New Roman", serif;
  --font-body: "Source Serif 4", Georgia, serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 180ms;
  --dur-med: 320ms;
  --dur-slow: 640ms;

  --container: 1080px;
  --content: 640px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  position: relative;
  overflow-x: hidden;
}

::selection {
  background: var(--accent-glow);
  color: var(--text);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}

a:hover {
  color: var(--accent-soft);
}

button {
  font: inherit;
  cursor: pointer;
  background: none;
  color: inherit;
  border: 0;
}

/* ==========================================================================
   Ambient background: aurora glow + grain texture
   ========================================================================== */
.bg-aurora,
.bg-grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.bg-aurora {
  background:
    radial-gradient(
      55rem 42rem at 12% -8%,
      rgba(168, 85, 247, 0.28),
      transparent 60%
    ),
    radial-gradient(
      48rem 38rem at 108% 8%,
      rgba(244, 114, 182, 0.22),
      transparent 60%
    ),
    radial-gradient(
      70rem 50rem at 50% 120%,
      rgba(80, 40, 180, 0.28),
      transparent 60%
    );
  filter: blur(2px) saturate(1.05);
  animation: auroraDrift 22s var(--ease-in-out) infinite alternate;
  opacity: 0.9;
}

@keyframes auroraDrift {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  100% {
    transform: translate3d(-2%, 1.5%, 0) scale(1.03);
  }
}

.bg-grain {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.55 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.9'/></svg>");
  opacity: 0.06;
  mix-blend-mode: overlay;
}

/* ==========================================================================
   App shell
   ========================================================================== */
.app {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

/* ==========================================================================
   Top navigation
   ========================================================================== */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--text);
  transition: color var(--dur-fast) var(--ease-out);
}

.brand:hover {
  color: var(--accent-soft);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0) 55%),
    linear-gradient(135deg, var(--accent) 0%, var(--accent-hot) 100%);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.04em;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.35),
    0 8px 24px -8px var(--accent-glow);
  transform: translateY(1px);
}

.brand-name {
  font-style: italic;
  font-feature-settings: "ss01" on;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text-muted);
  border: 1px solid transparent;
  transition:
    color var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out);
}

.nav-link:hover {
  color: var(--text);
  background: var(--surface-hover);
  border-color: var(--border);
}

.nav-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 50%;
  color: var(--text-muted);
  border: 1px solid transparent;
  transition:
    color var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}

.nav-icon:hover {
  color: var(--text);
  background: var(--surface-hover);
  border-color: var(--border);
  transform: translateY(-1px);
}

.nav-icon svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.zap-btn {
  font-size: 16px;
  line-height: 1;
}

.zap-btn:hover {
  filter: drop-shadow(0 0 10px rgba(255, 200, 60, 0.55));
}

/* ==========================================================================
   Main content
   ========================================================================== */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 56px;
  padding: 32px 0 80px;
  width: 100%;
}

/* Hero */
.hero {
  max-width: var(--content);
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  animation: riseIn 800ms var(--ease-out) both;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin: 0;
  border-radius: var(--radius-pill);
  background: var(--surface);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}

.display {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(44px, 8.5vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  color: var(--text);
  font-variation-settings: "SOFT" 40, "opsz" 144;
}

.display em {
  font-style: italic;
  font-weight: 300;
  background: linear-gradient(100deg, var(--accent-soft) 10%, var(--accent-hot) 70%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-variation-settings: "SOFT" 100, "opsz" 144;
}

.lede {
  margin: 0;
  max-width: 44ch;
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.55;
}

/* ==========================================================================
   Composer card
   ========================================================================== */
.composer {
  width: 100%;
  max-width: var(--content);
  animation: riseIn 900ms 120ms var(--ease-out) both;
}

.composer-form {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 28px;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(18px) saturate(1.1);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
}

.composer-form::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(
    140deg,
    rgba(168, 85, 247, 0.3),
    rgba(255, 255, 255, 0.02) 38%,
    rgba(244, 114, 182, 0.25)
  );
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.7;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field-label,
.select-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.input {
  width: 100%;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: rgba(10, 10, 18, 0.6);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: -0.005em;
  transition:
    border-color var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out);
}

.input::placeholder {
  color: var(--text-dim);
}

.input:hover {
  border-color: var(--border-strong);
}

.input:focus,
.input:focus-visible {
  outline: none;
  border-color: var(--border-focus);
  background: rgba(16, 12, 28, 0.8);
  box-shadow: 0 0 0 4px rgba(168, 85, 247, 0.15);
}

/* Select + actions row */
.composer-actions {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.select-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1 1 180px;
  min-width: 180px;
}

.select {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  padding: 13px 42px 13px 16px;
  border-radius: var(--radius-md);
  background:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'><path d='M1 1.25L6 6.25L11 1.25' stroke='%23a49fc3' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/></svg>")
      no-repeat right 16px center,
    rgba(10, 10, 18, 0.6);
  background-size: 12px 8px;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  transition:
    border-color var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out);
  cursor: pointer;
}

.select:hover {
  border-color: var(--border-strong);
}

.select:focus,
.select:focus-visible {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 4px rgba(168, 85, 247, 0.15);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  --btn-pad-y: 14px;
  --btn-pad-x: 22px;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: var(--btn-pad-y) var(--btn-pad-x);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  color: var(--text);
  transition:
    transform var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-med) var(--ease-out),
    color var(--dur-fast) var(--ease-out);
  user-select: none;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(168, 85, 247, 0.25);
}

.btn:disabled,
.btn[data-loading="true"] {
  cursor: not-allowed;
}

/* Primary: gradient with inner highlight + glow */
.btn-primary {
  flex: 0 1 auto;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0) 42%),
    linear-gradient(130deg, var(--accent-deep) 0%, var(--accent) 45%, var(--accent-hot) 100%);
  color: #fff;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.35),
    inset 0 -1px 0 rgba(0, 0, 0, 0.2),
    0 14px 32px -12px var(--accent-glow),
    0 6px 14px -6px var(--accent-glow-hot);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.4),
    inset 0 -1px 0 rgba(0, 0, 0, 0.2),
    0 20px 48px -14px var(--accent-glow),
    0 10px 20px -8px var(--accent-glow-hot);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-primary:disabled {
  filter: saturate(0.45) brightness(0.7);
  box-shadow: none;
}

.btn-primary .btn-arrow {
  width: 16px;
  height: 16px;
  transition: transform var(--dur-fast) var(--ease-out);
}

.btn-primary:hover:not(:disabled) .btn-arrow {
  transform: translateX(3px);
}

.btn-primary[data-loading="true"] .btn-label {
  opacity: 0.75;
}

.btn-primary[data-loading="true"] .btn-arrow {
  animation: spin 900ms linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Secondary: ghost */
.btn-secondary {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--surface-hover);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.btn-secondary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-secondary:disabled {
  color: var(--text-dim);
  cursor: not-allowed;
}

.btn-secondary[data-loading="true"] .btn-label {
  opacity: 0.65;
}

/* ==========================================================================
   Preview region
   ========================================================================== */
.preview {
  width: 100%;
  max-width: 880px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  animation: riseIn 1000ms 220ms var(--ease-out) both;
}

.preview-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.preview-frame::after {
  content: "";
  position: absolute;
  inset: -20%;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(
    60% 50% at 50% 50%,
    var(--accent-glow),
    transparent 70%
  );
  opacity: 0;
  transition: opacity var(--dur-slow) var(--ease-out);
}

.preview-frame[data-state="ready"]::after {
  opacity: 0.35;
}

.preview-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 32px;
  color: var(--text-dim);
  text-align: center;
  transition: opacity var(--dur-med) var(--ease-out);
}

.preview-frame[data-state="ready"] .preview-placeholder {
  opacity: 0;
  pointer-events: none;
}

.preview-frame[data-state="loading"] .preview-placeholder {
  opacity: 1;
}

.placeholder-mark {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 96px;
  line-height: 1;
  color: var(--text-dim);
  opacity: 0.5;
  user-select: none;
}

.placeholder-text {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.placeholder-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.loading-ring {
  display: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid var(--border-strong);
  border-top-color: var(--accent-soft);
  animation: spin 900ms linear infinite;
}

.preview-frame[data-state="loading"] .loading-ring {
  display: block;
}

.preview-frame[data-state="loading"] .placeholder-mark,
.preview-frame[data-state="loading"] .placeholder-text,
.preview-frame[data-state="loading"] .placeholder-meta {
  display: none;
}

#result-image {
  display: none;
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: relative;
  z-index: 1;
}

#upload-button {
  display: none;
}

#canvas {
  position: fixed;
  top: -10000px;
  left: -10000px;
  width: 1px;
  height: 1px;
  pointer-events: none;
  opacity: 0;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0 36px;
  gap: 16px;
  font-size: 13px;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
}

.footer-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-note em {
  color: var(--text-muted);
  font-style: normal;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 720px) {
  .app {
    padding: 0 20px;
  }

  .nav {
    padding: 20px 0;
  }

  .nav-link[data-label] {
    padding: 10px;
  }

  .nav-link-text {
    display: none;
  }

  .main {
    gap: 44px;
    padding: 16px 0 56px;
  }

  .composer-form {
    padding: 22px;
    border-radius: var(--radius-lg);
  }

  .composer-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .select-field,
  .btn-primary {
    width: 100%;
  }

  .btn-primary {
    justify-content: center;
  }

  .preview-frame {
    border-radius: var(--radius-lg);
  }

  .footer {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 420px) {
  .brand-name {
    display: none;
  }
}