:root {
  --color-primary: #5b8def;
  --color-secondary: #f5a623;
  --color-accent: #e94e77;
  --color-bg: #0b0c10;
  --color-text: #f5f5f5;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --border-subtle: 1px solid rgba(255,255,255,0.08);
  --shadow-soft: 0 18px 45px rgba(0,0,0,0.55);
  --glass-bg: rgba(15,16,25,0.85);
  --transition-fast: 0.18s ease-out;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  --font-serif: "Times New Roman", "YuMincho", "Hiragino Mincho ProN", serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  background: radial-gradient(circle at top, #1b1f3b 0, #05060a 55%, #000 100%);
  color: var(--color-text);
  display: flex;
  justify-content: center;
  align-items: stretch;
}

.app-shell {
  width: 100%;
  max-width: 1200px;
  margin: 16px;
  padding: 18px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(26px) saturate(140%);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Header */

.app-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: conic-gradient(from 210deg, var(--color-primary), var(--color-secondary), var(--color-accent), var(--color-primary));
  padding: 2px;
}

.brand-mark-inner {
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: #05060a;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 16px;
  font-weight: 700;
}

.brand-text-main {
  font-size: 18px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.9;
}

.brand-text-sub {
  font-size: 11px;
  opacity: 0.6;
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.chip {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.16);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  opacity: 0.7;
}

.btn-primary,
.btn-ghost {
  border-radius: 999px;
  padding: 8px 14px;
  border: none;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
  box-shadow: 0 16px 40px rgba(0,0,0,0.7);
}

.btn-ghost {
  background: rgba(0,0,0,0.4);
  color: var(--color-text);
  border: 1px solid rgba(255,255,255,0.18);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.06);
}

.btn-ghost.small,
.btn-primary.small {
  padding: 6px 10px;
  font-size: 11px;
}

.select-base {
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(0,0,0,0.4);
  color: #fff;
  font-size: 11px;
  padding: 6px 10px;
  outline: none;
}

/* Layout */

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr);
  gap: 16px;
}

@media (max-width: 840px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: var(--glass-bg);
  border-radius: var(--radius-lg);
  border: var(--border-subtle);
  padding: 14px 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.panel-title {
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.7;
}

.panel-subtitle {
  font-size: 11px;
  opacity: 0.6;
}

.panel-block {
  margin-top: 4px;
}

/* Palette grid */

.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
}

.color-card {
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: radial-gradient(circle at top left, rgba(255,255,255,0.06), rgba(0,0,0,0.7));
}

.color-swatch {
  border-radius: var(--radius-sm);
  height: 40px;
  border: 1px solid rgba(0,0,0,0.35);
}

.color-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  opacity: 0.8;
}

.color-inputs {
  display: flex;
  gap: 6px;
  align-items: center;
}

.color-inputs input[type="color"] {
  width: 32px;
  height: 24px;
  border-radius: 6px;
  border: none;
  padding: 0;
  background: transparent;
  cursor: pointer;
}

.color-inputs input[type="text"] {
  flex: 1;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(0,0,0,0.4);
  color: #fff;
  font-size: 11px;
  padding: 4px 8px;
  outline: none;
}

/* Presets */

.presets-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.preset-pill {
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 11px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(0,0,0,0.35);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  opacity: 0.8;
  transition: background var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast);
}

.preset-pill:hover {
  background: rgba(255,255,255,0.06);
  opacity: 1;
  transform: translateY(-1px);
}

.preset-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,0.4);
}

/* Contrast */

.contrast-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.contrast-item {
  flex: 1 1 90px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.16);
  padding: 6px 8px;
  font-size: 11px;
  background: rgba(0,0,0,0.4);
}

.contrast-label {
  opacity: 0.7;
}

.contrast-value {
  margin-top: 2px;
  font-weight: 600;
}

/* History & Favorites */

.history-fav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

@media (max-width: 640px) {
  .history-fav {
    grid-template-columns: 1fr;
  }
}

.history-column {
  min-height: 40px;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 4px;
}

.pill {
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 10px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(0,0,0,0.4);
  cursor: pointer;
  opacity: 0.8;
}

.pill:hover {
  opacity: 1;
}

/* Tabs & preview */

.tabs {
  display: flex;
  gap: 6px;
  border-radius: 999px;
  padding: 3px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  align-self: flex-start;
}

.tab {
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.6;
  cursor: pointer;
  border: none;
  background: transparent;
  color: inherit;
  transition: background var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast);
}

.tab.active {
  background: rgba(0,0,0,0.7);
  opacity: 1;
  transform: translateY(-1px);
}

.preview-surface {
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.12);
  background: #05060a;
  overflow: hidden;
  min-height: 260px;
  position: relative;
}

.preview-inner {
  width: 100%;
  height: 100%;
  display: none;
}

.preview-inner.active {
  display: block;
}

/* Web preview */

.preview-web {
  display: grid;
  grid-template-rows: auto 1fr;
  background: var(--color-bg);
  color: var(--color-text);
}

.preview-web-header {
  padding: 10px 14px;
  background: linear-gradient(135deg, rgba(255,255,255,0.06), rgba(0,0,0,0.7));
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.preview-web-logo {
  font-family: var(--font-serif);
  font-size: 16px;
}

.preview-web-nav {
  display: flex;
  gap: 10px;
  font-size: 11px;
  opacity: 0.8;
}

.preview-web-nav span {
  padding: 4px 8px;
  border-radius: 999px;
}

.preview-web-nav span:nth-child(1) {
  background: var(--color-primary);
  color: #fff;
}

.preview-web-body {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 10px;
  padding: 12px;
}

@media (max-width: 640px) {
  .preview-web-body {
    grid-template-columns: 1fr;
  }
}

.preview-web-hero {
  border-radius: 14px;
  padding: 12px;
  background: radial-gradient(circle at top left, rgba(255,255,255,0.08), rgba(0,0,0,0.9));
  border: 1px solid rgba(255,255,255,0.12);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.preview-web-hero-title {
  font-size: 18px;
  font-family: var(--font-serif);
}

.preview-web-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(0,0,0,0.7);
  border: 1px solid rgba(255,255,255,0.16);
  opacity: 0.8;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--color-accent);
}

.preview-web-hero-text {
  font-size: 12px;
  opacity: 0.8;
}

.preview-web-hero-cta {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.preview-web-hero-cta button {
  flex: 0 0 auto;
  border-radius: 999px;
  padding: 6px 12px;
  border: none;
  font-size: 11px;
  cursor: pointer;
}

.preview-web-hero-cta .primary {
  background: var(--color-primary);
  color: #fff;
}

.preview-web-hero-cta .ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid rgba(255,255,255,0.2);
}

.preview-web-side {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.preview-web-card {
  border-radius: 12px;
  padding: 8px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(0,0,0,0.7);
  font-size: 11px;
}

.preview-web-card-title {
  font-size: 11px;
  opacity: 0.9;
}

.preview-web-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 4px;
}

.preview-web-chip {
  border-radius: 999px;
  padding: 2px 6px;
  font-size: 10px;
  border: 1px solid rgba(255,255,255,0.16);
  opacity: 0.8;
}

.preview-web-contrast-row {
  margin-top: 4px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.contrast-chip.bg-text {
  background: var(--color-bg);
  color: var(--color-text);
}

.contrast-chip.primary-text {
  background: var(--color-primary);
  color: #fff;
}

.contrast-chip.secondary-text {
  background: var(--color-secondary);
  color: #000;
}

/* Logo preview */

.preview-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, rgba(255,255,255,0.06), #05060a);
}

.logo-mark {
  width: 120px;
  height: 120px;
  border-radius: 32px;
  background: linear-gradient(145deg, var(--color-primary), var(--color-secondary));
  padding: 6px;
  box-shadow: 0 18px 40px rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-mark-inner {
  width: 100%;
  height: 100%;
  border-radius: 26px;
  background: #05060a;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.logo-ring {
  position: absolute;
  width: 130%;
  height: 130%;
  border-radius: 999px;
  border: 16px solid rgba(255,255,255,0.04);
  border-top-color: var(--color-accent);
  border-right-color: var(--color-secondary);
  transform: rotate(-18deg);
}

.logo-letter {
  position: relative;
  font-family: var(--font-serif);
  font-size: 40px;
  color: var(--color-primary);
  text-shadow: 0 0 18px rgba(0,0,0,0.9);
}

/* Illustration preview */

.preview-illustration {
  background: radial-gradient(circle at top, var(--color-primary), #05060a 55%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.illu-canvas {
  width: 100%;
  max-width: 360px;
  aspect-ratio: 4/3;
  border-radius: 22px;
  background: linear-gradient(145deg, rgba(0,0,0,0.9), rgba(255,255,255,0.04));
  border: 1px solid rgba(255,255,255,0.18);
  position: relative;
  overflow: hidden;
}

.illu-sun {
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 999px;
  background: var(--color-secondary);
  top: 18px;
  right: 24px;
  box-shadow: 0 0 40px rgba(0,0,0,0.7);
}

.illu-mountain {
  position: absolute;
  bottom: -10px;
  left: -10px;
  width: 70%;
  height: 60%;
  background: var(--color-primary);
  clip-path: polygon(0 100%, 50% 20%, 100% 100%);
  opacity: 0.9;
}

.illu-mountain-2 {
  position: absolute;
  bottom: -6px;
  right: -10px;
  width: 60%;
  height: 55%;
  background: var(--color-accent);
  clip-path: polygon(0 100%, 50% 30%, 100% 100%);
  opacity: 0.8;
}

.illu-ground {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 26%;
  background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
}

/* Poster preview */

.preview-poster {
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at bottom, var(--color-accent), #05060a 55%);
  padding: 16px;
}

.poster {
  width: 100%;
  max-width: 360px;
  aspect-ratio: 3/4;
  border-radius: 22px;
  background: #05060a;
  border: 1px solid rgba(255,255,255,0.18);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.poster-tagline {
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0.7;
}

.poster-title {
  font-family: var(--font-serif);
  font-size: 26px;
  line-height: 1.1;
}

.poster-gradient-bar {
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
  margin: 10px 0;
}

.poster-body {
  font-size: 11px;
  opacity: 0.8;
}

.poster-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
  opacity: 0.7;
}

.poster-badge {
  border-radius: 999px;
  padding: 3px 8px;
  border: 1px solid rgba(255,255,255,0.2);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

/* Export */

.export-block {
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.16);
  padding: 10px;
  background: rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.export-tabs {
  display: flex;
  gap: 6px;
}

.export-tab {
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 11px;
  border: 1px solid rgba(255,255,255,0.18);
  background: transparent;
  color: #fff;
  cursor: pointer;
  opacity: 0.7;
}

.export-tab.active {
  background: rgba(255,255,255,0.08);
  opacity: 1;
}

.export-output {
  width: 100%;
  min-height: 120px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 11px;
  padding: 8px;
  resize: vertical;
}

/* Footer */

.app-footer {
  margin-top: 4px;
  font-size: 11px;
  opacity: 0.6;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px;
  align-items: center;
}

.app-footer a {
  color: var(--color-primary);
  text-decoration: none;
}

.app-footer a:hover {
  text-decoration: underline;
}