:root {
  --theme: #6c7cff;
  --theme-2: #8b5cf6;
  --theme-3: #22c55e;
  --theme-soft: rgba(108, 124, 255, 0.14);
  --theme-muted: rgba(139, 92, 246, 0.12);
  --theme-focus: rgba(108, 124, 255, 0.2);
  --theme-shadow: rgba(108, 124, 255, 0.34);

  --dark-theme-bg: #0f1b34;
  --dark-card-bg: rgba(15, 23, 42, 0.82);

  --page: #f6f7fb;
  --panel: rgba(255, 255, 255, 0.78);
  --text: #111827;
  --copy: #334155;
  --muted: #64748b;
  --line: rgba(148, 163, 184, 0.22);

  --shadow:
    0 24px 80px rgba(15, 23, 42, 0.14),
    0 8px 24px rgba(108, 124, 255, 0.14);

  --radius-xl: 30px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  font-family: "Inter", Arial, sans-serif;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 12% 10%, rgba(108, 124, 255, 0.26), transparent 22%),
    radial-gradient(circle at 88% 18%, rgba(139, 92, 246, 0.22), transparent 20%),
    radial-gradient(circle at 18% 88%, rgba(34, 197, 94, 0.12), transparent 20%),
    linear-gradient(135deg, #f8fbff 0%, #eef2ff 48%, #f7f7fb 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: auto;
  top: -180px;
  right: -120px;
  width: 540px;
  height: 540px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(108, 124, 255, 0.34), transparent 68%);
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: "";
  position: fixed;
  inset: auto;
  bottom: -200px;
  left: -180px;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.22), transparent 70%);
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
}

button,
input,
textarea {
  font: inherit;
}

button { cursor: pointer; }

a { color: inherit; }

h1, h2, p { margin-top: 0; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.project-back-button {
  position: fixed;
  left: 18px;
  top: 18px;
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.82);
  color: #111827;
  text-decoration: none;
  font-weight: 800;
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-back-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.18);
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(1300px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 34px 0;
  display: grid;
  grid-template-columns: minmax(360px, 0.92fr) minmax(360px, 1.08fr);
  gap: 30px;
  align-items: center;
}

.editor-panel {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(145deg, rgba(255,255,255,0.9), rgba(255,255,255,0.72)),
    radial-gradient(circle at top left, rgba(108,124,255,0.12), transparent 40%),
    radial-gradient(circle at bottom right, rgba(139,92,246,0.1), transparent 35%);
  border: 1px solid rgba(255,255,255,0.68);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
}

.editor-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.25), transparent 30%),
    linear-gradient(225deg, rgba(255,255,255,0.14), transparent 22%);
  pointer-events: none;
}

.panel-header {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0;
  width: fit-content;
  padding: 7px 11px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #4f46e5;
  background: linear-gradient(135deg, rgba(79,70,229,0.12), rgba(168,85,247,0.12));
  border: 1px solid rgba(99,102,241,0.12);
}

#editor-title {
  margin: 0;
  font-size: clamp(1.9rem, 3vw, 2.8rem);
  line-height: 1.04;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, #0f172a, #4f46e5 55%, #8b5cf6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.profile-form {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field,
.color-picker {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.88);
  color: var(--text);
  padding: 12px 14px;
  outline: none;
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.04);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.field textarea {
  resize: vertical;
  min-height: 112px;
  line-height: 1.55;
}

.field input:focus,
.field textarea:focus {
  border-color: rgba(108,124,255,0.65);
  box-shadow: 0 0 0 4px rgba(108,124,255,0.16);
  transform: translateY(-1px);
}

.control-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: end;
}

.segmented-control,
.mode-toggle {
  background: rgba(248, 250, 252, 0.94);
  border: 1px solid rgba(148, 163, 184, 0.18);
  backdrop-filter: blur(12px);
}

.segmented-control {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 4px;
  margin: 0;
  padding: 4px;
  border-radius: var(--radius-md);
}

.segmented-control input,
.mode-toggle input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented-control span,
.mode-toggle .toggle-face {
  display: grid;
  place-items: center;
  min-height: 38px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 800;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.segmented-control input:checked + span,
.mode-toggle input:checked + .toggle-face {
  background: linear-gradient(135deg, var(--theme), var(--theme-2));
  color: #fff;
  box-shadow: 0 10px 24px rgba(108,124,255,0.28);
}

.mode-toggle {
  position: relative;
  width: 56px;
  min-width: 56px;
  padding: 4px;
  border-radius: var(--radius-md);
}

.mode-toggle .toggle-face::before { content: "☀"; }
.mode-toggle input:checked + .toggle-face::before { content: "☾"; }

.action-row {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  align-items: center;
}

.primary-btn,
.secondary-btn {
  min-height: 46px;
  padding: 0 18px;
  border-radius: 14px;
  border: 1px solid transparent;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.primary-btn {
  color: white;
  background: linear-gradient(135deg, var(--theme), var(--theme-2) 58%, #2563eb);
  box-shadow: 0 14px 30px rgba(108,124,255,0.34);
}

.secondary-btn {
  background: rgba(255,255,255,0.86);
  border-color: rgba(148,163,184,0.22);
}

.preview-panel {
  perspective: 1800px;
}

.card {
  --rotate-x: 0deg;
  --rotate-y: 0deg;
  position: relative;
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  min-height: 620px;
  border-radius: 36px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  background:
    radial-gradient(circle at top left, rgba(255,255,255,0.24), transparent 28%),
    linear-gradient(135deg, rgba(108,124,255,0.18), rgba(139,92,246,0.16));
  box-shadow:
    0 40px 100px rgba(15, 23, 42, 0.24),
    0 18px 42px rgba(108,124,255,0.16);
  transform: rotateX(var(--rotate-x)) rotateY(var(--rotate-y));
  transform-style: preserve-3d;
  transition: transform 0.22s cubic-bezier(0.25,1,0.5,1);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,0.28), transparent 18%),
    radial-gradient(circle at 80% 10%, rgba(255,255,255,0.16), transparent 20%),
    linear-gradient(135deg, rgba(255,255,255,0.12), transparent 35%);
  pointer-events: none;
}

.container1 {
  position: relative;
  overflow: hidden;
  z-index: 1;
  background:
    radial-gradient(circle at 30% 20%, rgba(255,255,255,0.26), transparent 28%),
    linear-gradient(145deg, #7c3aed, #2563eb 55%, #22c55e);
}

.container1::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.14), transparent 28%),
    linear-gradient(135deg, rgba(255,255,255,0.1), transparent 40%);
  pointer-events: none;
}

.image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.container2 {
  position: relative;
  z-index: 2;
  padding: clamp(28px, 5vw, 56px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    radial-gradient(circle at top right, rgba(255,255,255,0.16), transparent 24%),
    linear-gradient(145deg, rgba(255,255,255,0.72), rgba(255,255,255,0.34));
  backdrop-filter: blur(16px);
}

.container2::before {
  content: "";
  position: absolute;
  top: 22px;
  right: 22px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(108,124,255,0.18), transparent 68%);
  filter: blur(4px);
  pointer-events: none;
}

.card-label {
  margin: 0 0 10px;
  color: #4f46e5;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.heading {
  margin-bottom: 10px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

.subhead {
  margin-bottom: 0;
  color: #475569;
  font-size: 1rem;
  font-weight: 800;
}

.info {
  margin: 26px 0 30px;
  color: var(--copy);
  font-family: "Roboto Mono", monospace;
  font-size: 0.96rem;
  line-height: 1.8;
}

.profile {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding: 10px;
  border-radius: 18px;
  width: fit-content;
  background: rgba(255,255,255,0.52);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.7);
}

.profile a {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: rgba(255,255,255,0.84);
  border: 1px solid rgba(255,255,255,0.72);
  box-shadow: 0 10px 24px rgba(15,23,42,0.08);
}

.logo {
  width: 22px;
  height: 22px;
  object-fit: contain;
}

.download-wrapper {
  position: relative;
  display: inline-block;
}

.download-dropdown {
  position: absolute;
  right: 0;
  bottom: calc(100% + 10px);
  min-width: 220px;
  background: rgba(255,255,255,0.94);
  border: 1px solid rgba(148,163,184,0.18);
  border-radius: 16px;
  box-shadow: 0 20px 48px rgba(15,23,42,0.18);
  overflow: hidden;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px) scale(0.97);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.download-dropdown.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 16px;
  border: none;
  background: transparent;
  border-bottom: 1px solid rgba(148,163,184,0.14);
  text-align: left;
}

.dropdown-item:last-child { border-bottom: none; }

.format-badge {
  min-width: 44px;
  padding: 4px 8px;
  border-radius: 8px;
  background: rgba(108,124,255,0.12);
  color: #4f46e5;
  font-family: "Roboto Mono", monospace;
  font-size: 0.78rem;
  font-weight: 800;
}

.format-desc {
  font-size: 0.82rem;
  color: var(--muted);
}

.is-dark {
  --text: #f8fafc;
  --copy: #e5e7eb;
  --muted: #a5b4c6;
  background:
    radial-gradient(circle at 12% 10%, rgba(108,124,255,0.24), transparent 22%),
    radial-gradient(circle at 88% 18%, rgba(139,92,246,0.18), transparent 20%),
    linear-gradient(135deg, #050816 0%, #0b1020 60%, #111827 100%);
}

.is-dark .editor-panel {
  background:
    linear-gradient(145deg, rgba(17,24,39,0.92), rgba(17,24,39,0.74)),
    radial-gradient(circle at top left, rgba(108,124,255,0.12), transparent 40%);
  border-color: rgba(255,255,255,0.08);
}

.is-dark #editor-title {
  background: linear-gradient(135deg, #ffffff, #93c5fd 55%, #c084fc);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.is-dark .field input,
.is-dark .field textarea,
.is-dark .secondary-btn,
.is-dark .color-picker input {
  background: rgba(15,23,42,0.88);
  border-color: rgba(148,163,184,0.18);
  color: var(--text);
}

.is-dark .segmented-control,
.is-dark .mode-toggle {
  background: rgba(15,23,42,0.86);
  border-color: rgba(148,163,184,0.18);
}

.is-dark .container2 {
  background:
    radial-gradient(circle at top right, rgba(255,255,255,0.08), transparent 24%),
    linear-gradient(145deg, rgba(15,23,42,0.82), rgba(15,23,42,0.62));
}

.is-dark .subhead,
.is-dark .info,
.is-dark .format-desc {
  color: #dbeafe;
}

.is-dark .profile {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.08);
}

.is-dark .profile a {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.1);
}

.is-dark .monochrome {
  filter: invert(1);
}

.is-dark .download-dropdown {
  background: rgba(15,23,42,0.96);
  border-color: rgba(148,163,184,0.16);
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 24px 0;
  }

  .preview-panel {
    order: -1;
  }
}

@media (max-width: 680px) {
  .project-back-button {
    left: 12px;
    top: 12px;
    padding: 8px 12px;
    font-size: 0.85rem;
  }

  .app-shell {
    width: min(100% - 20px, 560px);
    padding: 14px 0 18px;
  }

  .editor-panel {
    padding: 18px;
  }

  .form-grid,
  .control-row {
    grid-template-columns: 1fr;
  }

  .action-row {
    flex-direction: column-reverse;
  }

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

  .card {
    grid-template-columns: 1fr;
    border-radius: 26px;
    min-height: auto;
  }

  .container1 {
    min-height: 300px;
  }

  .container2 {
    padding: 26px 22px 28px;
    align-items: center;
    text-align: center;
  }

  .profile {
    justify-content: center;
  }

  .info {
    margin: 22px 0 26px;
    font-size: 0.9rem;
    line-height: 1.65;
  }

  .heading {
    font-size: 2rem;
    line-height: 1.08;
  }
}