:root {
  --bg: #f7f8fb;
  --bg-gradient: linear-gradient(180deg, #f9fafc 0%, #f1f3f9 100%);
  --card-bg: #ffffff;
  --text: #1c1f2b;
  --text-muted: #6b7280;
  --text-faint: #9aa1b1;
  --border: #e8eaf0;
  --assistant-accent: #6366f1;
  --assistant-accent-dark: #4f46e5;
  --assistant-accent-light: #eef0fd;
  --generate-accent: #ec4899;
  --generate-accent-dark: #db2777;
  --generate-accent-light: #fdeef6;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.04);
  --shadow-md: 0 4px 16px rgba(16, 24, 40, 0.06);
  --shadow-lg: 0 12px 32px rgba(16, 24, 40, 0.10);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Inter", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Segoe UI", sans-serif;
  background: var(--bg-gradient);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

/* ---------- Header ---------- */

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 20px 32px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.app-header-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 1280px;
  margin: 0 auto;
}

.app-logo {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--assistant-accent), var(--generate-accent));
}

.app-header h1 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.app-sub {
  margin: 2px 0 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

@media (max-width: 600px) {
  .app-header { padding: 14px 18px; }
  .app-header h1 { font-size: 1.05rem; }
  .app-sub { font-size: 0.75rem; }
}

/* ---------- Layout ---------- */

.main-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  padding: 36px 32px 64px;
  max-width: 1280px;
  margin: 0 auto;
  align-items: start;
}

@media (max-width: 960px) {
  .main-grid {
    grid-template-columns: 1fr;
    padding: 20px 16px 48px;
    gap: 20px;
  }
}

/* ---------- Panel ---------- */

.panel {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

@media (max-width: 600px) {
  .panel { padding: 22px 18px; }
}

.panel-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 5px 12px;
  border-radius: 999px;
  width: fit-content;
  margin-bottom: 14px;
}

.panel-assistant .panel-badge {
  background: var(--assistant-accent-light);
  color: var(--assistant-accent-dark);
}

.panel-generate .panel-badge {
  background: var(--generate-accent-light);
  color: var(--generate-accent-dark);
}

.panel h2 {
  margin: 0 0 10px;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.panel-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  margin: 0 0 26px;
}

/* ---------- Fields ---------- */

.field {
  margin-bottom: 20px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 520px) {
  .field-row {
    grid-template-columns: 1fr;
  }
}

label {
  display: block;
  font-size: 0.83rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

select, textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-family: inherit;
  background: #fbfbfd;
  color: var(--text);
  resize: vertical;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236b7280' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

textarea::placeholder { color: var(--text-faint); }

select:focus, textarea:focus {
  outline: none;
  border-color: var(--assistant-accent);
  background: #ffffff;
  box-shadow: 0 0 0 4px var(--assistant-accent-light);
}

.panel-generate select:focus, .panel-generate textarea:focus {
  border-color: var(--generate-accent);
  box-shadow: 0 0 0 4px var(--generate-accent-light);
}

/* ---------- Upload box ---------- */

.upload-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 32px 16px;
  border: 1.5px dashed #c7cbe0;
  border-radius: var(--radius-md);
  background: #fbfbfd;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  text-align: center;
  transition: border-color 0.15s, background 0.15s;
}

.upload-box:hover {
  border-color: var(--assistant-accent);
  background: var(--assistant-accent-light);
  color: var(--assistant-accent-dark);
}

.upload-icon {
  font-size: 1.9rem;
}

/* ---------- Hint / notice / error ---------- */

.hint-text {
  font-size: 0.8rem;
  color: var(--text-faint);
  margin: -10px 0 18px;
  line-height: 1.6;
}

.error-box {
  margin-top: 16px;
  padding: 14px 16px;
  background: #fef2f2;
  color: #b91c1c;
  border: 1px solid #fecaca;
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  line-height: 1.6;
}

.notice-box {
  margin-top: 16px;
  padding: 16px 18px;
  background: var(--generate-accent-light);
  color: #9d174d;
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  line-height: 1.7;
}

/* ---------- Buttons ---------- */

.btn {
  width: 100%;
  padding: 14px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.98rem;
  font-weight: 700;
  cursor: pointer;
  color: #fff;
  margin-top: 6px;
  transition: opacity 0.15s, transform 0.1s, box-shadow 0.15s;
}

.btn:hover:not(:disabled) {
  opacity: 0.92;
  box-shadow: var(--shadow-lg);
}

.btn:active:not(:disabled) { transform: scale(0.99); }

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

.btn-assistant {
  background: linear-gradient(135deg, var(--assistant-accent), var(--assistant-accent-dark));
}

.btn-generate {
  background: linear-gradient(135deg, var(--generate-accent), var(--generate-accent-dark));
}

/* ---------- Result box ---------- */

.result-box {
  margin-top: 24px;
  padding: 20px 22px;
  background: var(--assistant-accent-light);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  line-height: 1.8;
}

.result-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--assistant-accent-dark);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

#consult-answer {
  margin: 0;
  white-space: pre-wrap;
}

/* ---------- Preview cards ---------- */

.preview-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--generate-accent-dark);
  margin: 24px 0 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.preview-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
}

@media (max-width: 960px) and (min-width: 601px) {
  .preview-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .preview-cards {
    grid-template-columns: 1fr;
  }
}

.preview-card {
  background: var(--generate-accent-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.preview-thumb {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  aspect-ratio: 3 / 4;
  padding: 14px;
  color: var(--generate-accent-dark);
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
  border: 1.5px dashed rgba(236, 72, 153, 0.35);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.preview-icon {
  font-size: 2rem;
}

.preview-sub {
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--text-muted);
  line-height: 1.5;
}

.preview-meta {
  padding: 12px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--card-bg);
}