:root {
  color-scheme: light;
  --ink: #1a1d24;
  --muted: #5b6472;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: rgba(255, 255, 255, 0.94);
  --border: rgba(24, 32, 48, 0.12);
  --accent: #f15a24;
  --accent-2: #ffbb33;
  --shadow: 0 18px 50px rgba(13, 19, 33, 0.15);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: "Space Grotesk", "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 10%, rgba(255, 187, 51, 0.28), transparent 40%),
    radial-gradient(circle at 85% 20%, rgba(241, 90, 36, 0.22), transparent 45%),
    radial-gradient(circle at 70% 85%, rgba(46, 141, 255, 0.16), transparent 40%),
    #f5f3ef;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px 72px;
  display: grid;
  gap: 28px;
}

.hero {
  display: grid;
  gap: 24px;
  padding: 28px;
  border-radius: 24px;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.hero-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.hero-copy {
  display: grid;
  gap: 12px;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  min-width: 160px;
}

.status-inline {
  margin: 0;
  font-size: 12px;
  text-align: right;
  min-height: 16px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 12px;
  color: var(--muted);
  margin: 0;
}

h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.02em;
}

.lead {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

button,
input {
  font: inherit;
}

button {
  border: 1px solid rgba(24, 32, 48, 0.12);
  background: white;
  color: var(--ink);
  padding: 10px 16px;
  border-radius: 14px;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}

button:hover {
  transform: translateY(-1px);
  border-color: rgba(241, 90, 36, 0.55);
  box-shadow: 0 10px 22px rgba(241, 90, 36, 0.2);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.panel {
  padding: 22px;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 12px 34px rgba(13, 19, 33, 0.08);
}

h2 {
  margin: 0 0 14px;
  font-size: 16px;
  letter-spacing: 0.02em;
}

.chat-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.pdf-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 10px;
}

#pdfFile {
  flex: 1 1 260px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(24, 32, 48, 0.16);
  background: white;
}

.status {
  margin: 4px 0 0;
  color: var(--muted);
}

.doc-list {
  margin-top: 12px;
  display: grid;
  gap: 10px;
}

.doc-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(24, 32, 48, 0.08);
}

.doc-meta {
  display: grid;
  gap: 2px;
}

.doc-title {
  font-weight: 600;
}

.doc-sub {
  color: var(--muted);
  font-size: 12px;
}

#chatInput {
  flex: 1 1 240px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(24, 32, 48, 0.16);
  background: white;
}

.chat-area p {
  margin: 8px 0;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(24, 32, 48, 0.08);
}

@media (max-width: 720px) {
  .page {
    padding: 32px 16px 48px;
  }

  .hero {
    padding: 22px;
  }

  .hero-actions {
    align-items: flex-start;
  }

  .status-inline {
    text-align: left;
  }

  .chat-form {
    flex-direction: column;
  }

  .pdf-form {
    flex-direction: column;
    align-items: stretch;
  }
}