:root {
  --bg: #f3efe6;
  --panel: rgba(255, 252, 247, 0.96);
  --ink: #182126;
  --muted: #5f6a72;
  --line: #d5c9b8;
  --accent: #b24a2b;
  --accent-2: #1f6c6a;
  --shadow: 0 16px 48px rgba(24, 33, 38, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Aptos", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(178, 74, 43, 0.18), transparent 32%),
    radial-gradient(circle at top right, rgba(31, 108, 106, 0.16), transparent 28%),
    linear-gradient(180deg, #f8f4ed 0%, var(--bg) 100%);
  min-height: 100vh;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 0.75rem 1.2rem;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  transition: transform 120ms ease, opacity 120ms ease;
}

button.secondary {
  background: #ebe3d7;
  color: var(--ink);
}

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

button:disabled {
  opacity: 0.5;
  cursor: default;
  transform: none;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 2rem 2rem 1rem;
}

.eyebrow {
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  color: var(--accent);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.05;
}

.lede {
  max-width: 62ch;
  color: var(--muted);
}

.status-card,
.panel {
  background: var(--panel);
  border: 1px solid rgba(213, 201, 184, 0.75);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.status-card {
  min-width: 280px;
  border-radius: 24px;
  padding: 1rem 1.25rem;
  align-self: flex-start;
}

.status-label {
  margin: 0.35rem 0 0.15rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.status-value {
  margin: 0;
  font-weight: 700;
}

.layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding: 0 2rem 2rem;
}

.panel {
  border-radius: 26px;
  padding: 1.25rem;
}

.analysis-panel,
.results-panel,
.chat-panel {
  grid-column: 1 / -1;
}

.panel h2,
.panel h3 {
  margin-top: 0;
}

.stack {
  display: grid;
  gap: 1rem;
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field span {
  font-size: 0.9rem;
  color: var(--muted);
}

input,
textarea {
  width: 100%;
  border-radius: 18px;
  border: 1px solid var(--line);
  padding: 0.85rem 1rem;
  background: #fff;
  color: var(--ink);
}

textarea {
  resize: vertical;
}

.row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}

.checkbox {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  color: var(--muted);
}

.checkbox input {
  width: auto;
}

.hint {
  color: var(--muted);
  margin-bottom: 0;
}

.ai-banner {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  padding: 0.9rem 1rem;
  border-radius: 18px;
  border: 1.5px solid var(--line);
  background: #fff;
}

.ai-banner__icon {
  font-size: 1.15rem;
  line-height: 1.4;
  flex-shrink: 0;
}

.ai-banner__body {
  flex: 1;
  min-width: 0;
}

.ai-banner__title {
  margin: 0;
  font-weight: 700;
  text-transform: capitalize;
}

.ai-banner__detail {
  margin: 0.2rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.ai-banner__action {
  flex-shrink: 0;
  align-self: center;
  padding: 0.5rem 1rem;
  font-size: 0.88rem;
}

.ai-banner--checking {
  border-color: var(--line);
}

.ai-banner--available {
  border-color: rgba(31, 108, 106, 0.4);
  background: rgba(31, 108, 106, 0.05);
}

.ai-banner--available .ai-banner__title {
  color: var(--accent-2);
}

.ai-banner--download {
  border-color: rgba(178, 74, 43, 0.35);
  background: rgba(178, 74, 43, 0.04);
}

.ai-banner--download .ai-banner__action {
  background: var(--accent);
  color: #fff;
}

.ai-banner--downloading {
  border-color: rgba(178, 74, 43, 0.35);
  background: rgba(178, 74, 43, 0.04);
}

.ai-banner--unavailable {
  border-color: var(--line);
  background: #faf7f4;
}

.ai-banner--unavailable .ai-banner__title {
  color: var(--muted);
}


.corpus-list ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.corpus-item {
  padding: 0.8rem 1rem;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fff;
}

.corpus-item strong {
  display: block;
}

.corpus-meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.list-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1rem;
}

.summary {
  padding: 1rem;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--line);
}

.summary.empty {
  color: var(--muted);
}

.lesson-phase {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 20px;
  background: rgba(31, 108, 106, 0.06);
  border: 1px solid rgba(31, 108, 106, 0.15);
}

.lesson-phase h3 {
  margin-bottom: 0.5rem;
}

.lesson-phase ul {
  margin: 0;
  padding-left: 1.2rem;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: 18px;
  overflow: hidden;
}

th,
td {
  text-align: left;
  padding: 0.8rem 0.9rem;
  border-bottom: 1px solid #eee4d8;
}

thead {
  background: #f3e7d8;
}

.chat-log {
  min-height: 220px;
  max-height: 420px;
  overflow-y: auto;
  display: grid;
  gap: 0.85rem;
}

.chat-message {
  padding: 0.9rem 1rem;
  border-radius: 18px;
  max-width: 80ch;
  white-space: pre-wrap;
}

.chat-message.user {
  background: rgba(178, 74, 43, 0.1);
  justify-self: end;
}

.chat-message.assistant {
  background: rgba(31, 108, 106, 0.08);
  justify-self: start;
}

.chat-message.system {
  background: #fff;
  border: 1px dashed var(--line);
  color: var(--muted);
}

.chat-form {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

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

  .hero {
    flex-direction: column;
  }

  .status-card {
    min-width: 0;
  }

  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .hero,
  .layout {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }
}