:root {
  --bg-top: #f4efe7;
  --bg-bottom: #d9e6ef;
  --panel: rgba(255, 252, 247, 0.85);
  --panel-strong: rgba(255, 252, 247, 0.96);
  --border: rgba(20, 53, 87, 0.12);
  --text: #102235;
  --muted: #516273;
  --accent: #0f766e;
  --accent-strong: #0a5b55;
  --warm: #c56b2f;
  --user: #103b5d;
  --assistant: #f9f3eb;
  --shadow: 0 24px 70px rgba(16, 34, 53, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --font-sans: "Space Grotesk", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(197, 107, 47, 0.18), transparent 28%),
    radial-gradient(circle at right, rgba(15, 118, 110, 0.18), transparent 28%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(16, 34, 53, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 34, 53, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 90%);
}

.page-shell {
  position: relative;
  max-width: 1440px;
  margin: 0 auto;
  padding: 32px 24px 40px;
}

.hero {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 24px;
  align-items: stretch;
  margin-bottom: 24px;
}

.eyebrow,
.panel-label,
.card-label,
.meta-label {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  color: var(--muted);
}

.hero h1,
.panel-header h2 {
  margin: 0;
}

.hero h1 {
  font-size: clamp(2.75rem, 4vw, 5rem);
  line-height: 0.95;
}

.hero-copy,
.card-copy,
.meta-copy,
.hint {
  color: var(--muted);
}

.hero-card,
.panel,
.meta-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero-card {
  padding: 24px;
  align-self: end;
  background:
    linear-gradient(160deg, rgba(15, 118, 110, 0.12), rgba(255, 252, 247, 0.94)),
    var(--panel);
}

.card-title,
.meta-value {
  margin: 0 0 10px;
  font-size: 1.35rem;
  font-weight: 700;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(320px, 0.9fr);
  gap: 24px;
}

.panel {
  padding: 22px;
}

.panel-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.panel-header.slim {
  margin-bottom: 22px;
}

.status-pill {
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--accent-strong);
  background: rgba(15, 118, 110, 0.1);
  border: 1px solid rgba(15, 118, 110, 0.18);
}

.messages {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 420px;
  max-height: 62vh;
  overflow-y: auto;
  padding: 10px 4px 10px 0;
}

.empty-state {
  padding: 28px;
  border-radius: var(--radius-md);
  border: 1px dashed rgba(16, 34, 53, 0.18);
  background: rgba(255, 255, 255, 0.5);
}

.empty-state h3 {
  margin: 0 0 10px;
}

.message {
  padding: 16px 18px;
  border-radius: 22px;
  border: 1px solid var(--border);
  box-shadow: 0 16px 40px rgba(16, 34, 53, 0.07);
}

.message.user {
  align-self: flex-end;
  width: min(88%, 760px);
  background: linear-gradient(135deg, var(--user), #0d5673);
  color: #f7fbff;
}

.message.assistant {
  align-self: flex-start;
  width: min(92%, 860px);
  background: var(--assistant);
}

.message-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.message-body {
  line-height: 1.65;
}

.message-body p {
  margin: 0 0 1em;
}

.message-body p:last-child {
  margin-bottom: 0;
}

.message-body code {
  padding: 0.15rem 0.35rem;
  border-radius: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.95em;
  background: rgba(16, 34, 53, 0.08);
}

.message.user .message-body code {
  background: rgba(255, 255, 255, 0.14);
}

.message-body pre {
  margin: 1em 0;
  padding: 14px;
  overflow-x: auto;
  border-radius: 16px;
  font-family: var(--font-mono);
  background: #12202d;
  color: #edf4fb;
}

.message-body pre code {
  padding: 0;
  background: transparent;
}

.composer {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(16, 34, 53, 0.1);
}

.composer-label {
  display: inline-block;
  margin-bottom: 10px;
  font-weight: 600;
}

textarea,
select,
input {
  width: 100%;
  border: 1px solid rgba(16, 34, 53, 0.14);
  border-radius: 16px;
  padding: 14px 16px;
  font: inherit;
  color: var(--text);
  background: rgba(255, 255, 255, 0.82);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

textarea:focus,
select:focus,
input:focus,
button:focus {
  outline: 2px solid rgba(15, 118, 110, 0.25);
  outline-offset: 2px;
}

.composer-actions,
.action-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 13px 18px;
  font: inherit;
  font-weight: 700;
  color: #f8fffe;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
  box-shadow: 0 14px 30px rgba(15, 118, 110, 0.2);
}

button:hover {
  transform: translateY(-1px);
}

button:disabled {
  cursor: wait;
  opacity: 0.72;
  transform: none;
}

button.secondary {
  color: var(--text);
  background: rgba(16, 34, 53, 0.06);
  box-shadow: none;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-weight: 600;
}

.meta-card {
  margin-top: 18px;
  padding: 18px;
  background: var(--panel-strong);
}

.meta-card.note {
  background:
    linear-gradient(160deg, rgba(197, 107, 47, 0.1), rgba(255, 252, 247, 0.96)),
    var(--panel-strong);
}

.meta-card code {
  font-family: var(--font-mono);
}

@media (max-width: 1024px) {
  .hero,
  .workspace {
    grid-template-columns: 1fr;
  }

  .messages {
    max-height: none;
  }
}

@media (max-width: 640px) {
  .page-shell {
    padding: 18px 14px 24px;
  }

  .panel,
  .hero-card {
    padding: 18px;
  }

  .composer-actions,
  .action-row,
  .panel-header {
    flex-direction: column;
    align-items: stretch;
  }

  .message.user,
  .message.assistant {
    width: 100%;
  }
}