:root {
  color-scheme: light;
  font-family: var(--font-ui);
  --font-ui: 'Söhne', ui-sans-serif, -apple-system, 'Segoe UI', 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  --font-display: 'Söhne', ui-sans-serif, -apple-system, 'Segoe UI', 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  --font-mono: 'Söhne Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
  --surface-page: #eef3fb;
  --surface-card: rgba(255, 255, 255, 0.82);
  --surface-muted: #f1f5f9;
  --surface-shell: rgba(15, 23, 42, 0.92);
  --border-1: rgba(148, 163, 184, 0.26);
  --border-strong: #d7dde9;
  --accent-primary: #2563eb;
  --accent-secondary: #7c3aed;
  --accent-info: #0ea5e9;
  --accent-success: #16a34a;
  --accent-warning: #f97316;
  --accent-danger: #ef4444;
  --text-base: #0f172a;
  --text-muted: #64748b;
  --shadow-1: 0 35px 70px -40px rgba(15, 23, 42, 0.6);
  --shadow-2: 0 20px 40px -30px rgba(15, 23, 42, 0.35);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-pill: 999px;
  --bg-page: var(--surface-page);
  --bg-card: var(--surface-card);
  --bg-shell: var(--surface-shell);
  --border-subtle: var(--border-1);
  --shadow-elevated: var(--shadow-1);
  --shadow-soft: var(--shadow-2);
}

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

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  padding-block: clamp(12px, 2vw, 20px);
  padding-inline: clamp(16px, 2.5vw, 28px);
  font-family: var(--font-ui);
  line-height: 1.65;
  letter-spacing: 0.01em;
  color: var(--text-base);
  background-color: var(--bg-page);
  background-image:
    radial-gradient(circle at 18% 18%, rgba(59, 130, 246, 0.18), transparent 45%),
    radial-gradient(circle at 82% -10%, rgba(236, 72, 153, 0.18), transparent 52%),
    radial-gradient(circle at 50% 120%, rgba(14, 165, 233, 0.18), transparent 60%);
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(8, 145, 178, 0.12));
  z-index: -1;
}

button {
  font: inherit;
  border: none;
  background: none;
  color: inherit;
}

button:not(:disabled) {
  cursor: pointer;
}

.control-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 12px;
  border: 1px solid #cbd5e1;
  background: #ffffff;
  color: #1e293b;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.control-button--primary {
  border-color: #2563eb;
  background: #2563eb;
  color: #ffffff;
}

.control-button--ghost {
  background: #f1f5f9;
}

.control-button:hover {
  background: #e2e8f0;
}

.control-button--primary:hover {
  background: #1d4ed8;
  color: #ffffff;
}

.control-button:focus-visible {
  outline: 2px solid rgba(37, 99, 235, 0.8);
  outline-offset: 2px;
}

.control-button--primary:focus-visible {
  background: #1d4ed8;
}

.control-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.model-selector-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.model-selector-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}

.model-selector-wrapper {
  position: relative;
  display: inline-flex;
}

.model-selector-wrapper::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 14px;
  width: 8px;
  height: 5px;
  background-color: var(--text-muted);
  clip-path: polygon(100% 0%, 0% 0%, 50% 100%);
  transform: translateY(-50%);
  opacity: 0.5;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.model-selector-wrapper:hover::after {
  opacity: 0.8;
}

#model-selector {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  display: inline-block;
  width: 100%;
  padding: 10px 38px 10px 14px;
  font-size: 0.88rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-base);
  background-color: white;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

#model-selector:hover {
  border-color: #cbd5e1;
  background-color: #fcfdfe;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

#model-selector:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.08);
}

#model-selector:disabled {
  cursor: not-allowed;
  background-color: #f8fafc;
  opacity: 0.7;
}

.connection-indicator {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: 12px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-base);
  white-space: nowrap;
  transition: all 0.2s ease;
}

.connection-indicator .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #94a3b8;
  box-shadow: none;
}

.connection-indicator[data-state='connected'] .dot {
  background: #22c55e;
}

.connection-indicator[data-state='connecting'] .dot {
  background: #f59e0b;
  animation: pulse 1.4s ease-in-out infinite;
}

.connection-indicator[data-state='disconnected'] .dot {
  background: #ef4444;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.35);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(245, 158, 11, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0);
  }
}

.browser-pane {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.browser-shell {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  border-radius: 32px;
  overflow: hidden;
  border: 1px solid rgba(15, 23, 42, 0.35);
  background: radial-gradient(circle at 20% -10%, rgba(30, 64, 175, 0.5), transparent 55%),
    var(--bg-shell);
  box-shadow: 0 45px 90px -45px rgba(15, 23, 42, 0.8);
  min-height: 0;
}

.browser-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px clamp(16px, 3vw, 26px);
  background: linear-gradient(135deg, rgba(30, 64, 175, 0.9), rgba(2, 132, 199, 0.75));
  color: #e2e8f0;
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.browser-toolbar-dots {
  display: flex;
  gap: 6px;
}

.browser-toolbar-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(226, 232, 240, 0.65);
}

.browser-toolbar-dots span:nth-child(1) {
  background: #ef4444;
}

.browser-toolbar-dots span:nth-child(2) {
  background: #f59e0b;
}

.browser-toolbar-dots span:nth-child(3) {
  background: #22c55e;
}

.browser-toolbar-title {
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.browser-toolbar-url {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 0.85rem;
  color: rgba(226, 232, 240, 0.75);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.browser-pane iframe {
  border: none;
  width: 100%;
  height: 100%;
  background: #0b1120;
  flex: 1 1 auto;
}

@media (max-width: 960px) {
  body {
    padding: clamp(16px, 4vw, 24px);
  }

  .browser-shell {
    border-radius: 24px;
  }

  .connection-indicator {
    justify-content: center;
  }
}

@media (max-width: 520px) {

  .browser-toolbar-title {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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