*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #666666;
  --color-border: #e8e8e8;
  --color-accent: #2c2c2c;
  --color-accent-hover: #000000;
  --color-star: #f5a623;
  --radius: 12px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --font: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  --max-width: 640px;
  --spacing: 24px;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing);
}

.header {
  text-align: center;
  margin-bottom: calc(var(--spacing) * 2);
  padding-top: calc(var(--spacing) * 2);
}

.logo {
  font-size: 2.5rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  margin: 0 0 8px;
}

.tagline {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin: 0;
  letter-spacing: 0.05em;
}

.main {
  width: 100%;
  max-width: var(--max-width);
  flex: 1;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: calc(var(--spacing) * 1.25);
  margin-bottom: var(--spacing);
}

.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: var(--spacing);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 12px;
}

.tab {
  background: none;
  border: none;
  padding: 8px 20px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

.tab:hover {
  color: var(--color-text);
}

.tab.active {
  color: var(--color-text);
  background: var(--color-bg);
  font-weight: 600;
}

.tab-panel {
  margin-bottom: var(--spacing);
}

.tab-panel[hidden] {
  display: none;
}

.label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.input,
.textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 14px 16px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.15s;
}

.input:focus,
.textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.textarea {
  resize: vertical;
  min-height: 120px;
}

.btn-primary {
  width: 100%;
  padding: 16px;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  letter-spacing: 0.05em;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-accent-hover);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  padding: 10px 20px;
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn-secondary:hover {
  background: var(--color-border);
}

.status {
  margin: 12px 0 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  min-height: 1.2em;
}

.status.error {
  color: #c0392b;
}

.hidden {
  display: none !important;
}

.result-section {
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-meta {
  margin-bottom: var(--spacing);
}

.result-image {
  width: 100%;
  max-height: 200px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 16px;
}

.result-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 8px;
  line-height: 1.5;
}

.result-timing {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.result-body {
  line-height: 1.8;
}

.summary-block {
  margin-bottom: calc(var(--spacing) * 1.25);
}

.summary-block:last-child {
  margin-bottom: 0;
}

.summary-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.summary-text {
  font-size: 1rem;
  margin: 0;
  white-space: pre-wrap;
}

.summary-list {
  margin: 0;
  padding-left: 1.2em;
}

.summary-list li {
  margin-bottom: 4px;
}

.btn-read-more {
  display: block;
  width: 100%;
  margin-top: calc(var(--spacing) * 1.5);
  padding: 16px;
  background: var(--color-accent);
  color: #fff;
  text-align: center;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  transition: background 0.15s;
  letter-spacing: 0.05em;
}

.btn-read-more:hover {
  background: var(--color-accent-hover);
}

.feedback-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 16px;
}

.rating-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
}

.star {
  background: none;
  border: none;
  font-size: 1.8rem;
  color: var(--color-border);
  cursor: pointer;
  padding: 0 4px;
  transition: color 0.15s, transform 0.1s;
  line-height: 1;
}

.star:hover,
.star.active {
  color: var(--color-star);
}

.star:active {
  transform: scale(1.15);
}

.rating-binary {
  display: flex;
  gap: 12px;
}

.feedback-card .textarea {
  margin-bottom: 12px;
}

.footer {
  text-align: center;
  padding: calc(var(--spacing) * 2) var(--spacing);
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.footer p {
  margin: 0;
}

@media (max-width: 480px) {
  .logo {
    font-size: 2rem;
  }

  .card {
    padding: var(--spacing);
  }
}