:root {
  color-scheme: light;
  --bg: #f6f2e8;
  --paper: rgba(255, 252, 246, 0.86);
  --ink: #17211f;
  --muted: #55615f;
  --line: rgba(23, 33, 31, 0.12);
  --accent: #0f766e;
  --accent-strong: #134e4a;
  --warning: #b45309;
  --shadow: 0 24px 60px rgba(22, 27, 29, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.16), transparent 26%),
    radial-gradient(circle at top right, rgba(180, 83, 9, 0.14), transparent 24%),
    linear-gradient(180deg, #f8f6f1 0%, var(--bg) 100%);
}

.app-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 32px auto;
  display: grid;
  gap: 20px;
}

.hero,
.panel {
  background: var(--paper);
  backdrop-filter: blur(12px);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero {
  padding: 36px;
}

.panel {
  padding: 28px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-strong);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.75rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.lead,
.panel-header p {
  color: var(--muted);
  max-width: 70ch;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0;
}

button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 14px 22px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
}

button.secondary {
  color: var(--ink);
  background: white;
  border: 1px solid var(--line);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin: 0;
}

.status-grid div {
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
}

.status-grid dt {
  color: var(--muted);
  font-size: 0.9rem;
}

.status-grid dd {
  margin: 8px 0 0;
  font-size: 1.05rem;
  font-weight: 700;
}

.panel-header {
  margin-bottom: 16px;
}

.log {
  display: grid;
  gap: 10px;
  max-height: 420px;
  overflow: auto;
}

.log-item {
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  white-space: pre-wrap;
}

.log-item-user {
  border-color: rgba(15, 118, 110, 0.24);
}

.log-item-assistant {
  border-color: rgba(20, 78, 74, 0.22);
  background: rgba(227, 252, 248, 0.8);
}

.log-item-tool,
.log-item-tool-result {
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 0.92rem;
}

.log-item-error {
  color: #7c2d12;
  border-color: rgba(124, 45, 18, 0.2);
  background: rgba(255, 237, 213, 0.8);
}

.examples {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100% - 20px, 1120px);
    margin: 10px auto 24px;
  }

  .hero,
  .panel {
    padding: 20px;
    border-radius: 22px;
  }

  .actions {
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}