* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 18px;
}

body {
  font-family: -apple-system, "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.8;
  color: #333;
  background: #f8f9fa;
  padding: 20px;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  background: white;
  padding: 40px 30px;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.screen { display: none; }
.screen.active { display: block; }

.hero {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 30px;
  border-bottom: 2px solid #f0f0f0;
}

.hero h1 {
  font-size: 32px;
  margin-bottom: 16px;
  color: #2c3e50;
}

.lead {
  font-size: 22px;
  color: #555;
  margin-bottom: 8px;
}

.sub {
  font-size: 16px;
  color: #888;
}

.form { margin-top: 30px; }

.instruction-box {
  padding: 20px 24px;
  margin-bottom: 30px;
  background: #e8f4fd;
  border-left: 5px solid #3498db;
  border-radius: 6px;
}

.instruction-text {
  font-size: 18px;
  color: #2c3e50;
  margin-bottom: 8px;
}

.instruction-sub {
  font-size: 15px;
  color: #555;
  line-height: 1.9;
}

.or-divider {
  text-align: center;
  margin: 24px 0;
  font-size: 18px;
  font-weight: bold;
  color: #888;
  position: relative;
}

.or-divider::before,
.or-divider::after {
  content: "";
  display: inline-block;
  width: 80px;
  height: 1px;
  background: #ccc;
  vertical-align: middle;
  margin: 0 16px;
}

.field { margin-bottom: 28px; }

label {
  display: block;
  font-size: 19px;
  font-weight: bold;
  margin-bottom: 10px;
  color: #2c3e50;
}

input[type="url"] {
  width: 100%;
  padding: 16px;
  font-size: 18px;
  border: 2px solid #ddd;
  border-radius: 8px;
  background: #fafafa;
  transition: border-color 0.2s;
}

input[type="url"]:focus {
  outline: none;
  border-color: #3498db;
  background: white;
}

.hint {
  font-size: 15px;
  color: #888;
  margin-top: 6px;
}

.btn-primary {
  display: block;
  width: 100%;
  padding: 20px;
  font-size: 22px;
  font-weight: bold;
  color: white;
  background: linear-gradient(135deg, #3498db, #2980b9);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s;
  margin-top: 10px;
}

.btn-primary:hover {
  box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.btn-primary:active {
  transform: translateY(2px);
}

.btn-primary:disabled {
  background: #bbb;
  cursor: not-allowed;
}

.btn-secondary {
  padding: 14px 24px;
  font-size: 16px;
  background: white;
  color: #555;
  border: 2px solid #ddd;
  border-radius: 8px;
  cursor: pointer;
  margin: 4px;
}

.btn-secondary:hover { background: #f0f0f0; }

.note {
  font-size: 15px;
  color: #888;
  text-align: center;
  margin-top: 16px;
}

.disclaimer {
  margin-top: 50px;
  padding: 24px;
  background: #fffbe6;
  border-left: 4px solid #f39c12;
  border-radius: 6px;
}

.disclaimer h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: #d35400;
}

.disclaimer p {
  font-size: 14px;
  line-height: 1.9;
  color: #666;
}

.loading {
  text-align: center;
  padding: 60px 20px;
}

.loading h2 {
  font-size: 28px;
  margin-bottom: 20px;
}

.loading-message {
  font-size: 19px;
  color: #555;
  margin-bottom: 30px;
}

.progress-bar {
  width: 100%;
  height: 24px;
  background: #ecf0f1;
  border-radius: 12px;
  overflow: hidden;
  margin: 20px 0 12px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #3498db, #5dade2);
  transition: width 0.5s;
  width: 0%;
}

.progress-text {
  font-size: 22px;
  font-weight: bold;
  color: #3498db;
}

.loading-note {
  margin-top: 30px;
  font-size: 15px;
  color: #888;
  line-height: 2;
}

.result-header { margin-bottom: 30px; }

.result-header h2 {
  font-size: 28px;
  margin-bottom: 12px;
}

.video-title {
  font-size: 16px;
  color: #888;
  padding: 12px;
  background: #f8f9fa;
  border-radius: 6px;
}

.judgment-box {
  text-align: center;
  padding: 40px 20px;
  margin: 30px 0;
  border-radius: 12px;
  background: #f8f9fa;
}

.judgment-box.good { background: #e8f8f0; border: 2px solid #27ae60; }
.judgment-box.near { background: #e8f8f0; border: 2px solid #16a085; }
.judgment-box.border { background: #fef9e7; border: 2px solid #f1c40f; }
.judgment-box.warn { background: #fff3e0; border: 2px solid #e67e22; }
.judgment-box.ng { background: #fdedec; border: 2px solid #e74c3c; }

.judgment-icon {
  font-size: 60px;
  margin-bottom: 12px;
}

.judgment-label {
  font-size: 28px;
  margin-bottom: 24px;
}

.total-score { margin: 20px 0; }

.total-score #total-score {
  font-size: 72px;
  font-weight: bold;
  color: #2c3e50;
}

.of100 {
  font-size: 20px;
  color: #888;
}

.total-bar {
  width: 100%;
  max-width: 400px;
  margin: 20px auto;
  height: 16px;
  background: #ecf0f1;
  border-radius: 8px;
  overflow: hidden;
}

.total-bar-fill {
  height: 100%;
  transition: width 1s;
  background: #3498db;
}

.judgment-message {
  font-size: 18px;
  margin-top: 20px;
  color: #555;
}

.section-title {
  font-size: 22px;
  margin: 40px 0 20px;
  color: #2c3e50;
  padding-bottom: 8px;
  border-bottom: 2px solid #f0f0f0;
}

.score-card {
  padding: 20px;
  margin-bottom: 16px;
  background: white;
  border: 2px solid #f0f0f0;
  border-radius: 8px;
}

.score-card.good { border-color: #27ae60; }
.score-card.near { border-color: #16a085; }
.score-card.border { border-color: #f1c40f; }
.score-card.warn { border-color: #e67e22; }
.score-card.ng { border-color: #e74c3c; }

.score-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.score-card-title {
  font-size: 19px;
  font-weight: bold;
  color: #2c3e50;
}

.score-card-icon { font-size: 28px; }

.score-card-score {
  font-size: 22px;
  font-weight: bold;
}

.score-card-score.good { color: #27ae60; }
.score-card-score.near { color: #16a085; }
.score-card-score.border { color: #f39c12; }
.score-card-score.warn { color: #e67e22; }
.score-card-score.ng { color: #e74c3c; }

.score-card-desc {
  font-size: 16px;
  color: #666;
  line-height: 1.7;
}

.score-bar {
  width: 100%;
  height: 10px;
  background: #ecf0f1;
  border-radius: 5px;
  overflow: hidden;
  margin-top: 12px;
}

.score-bar-fill {
  height: 100%;
  transition: width 1s;
}

.score-bar-fill.good { background: #27ae60; }
.score-bar-fill.near { background: #16a085; }
.score-bar-fill.border { background: #f1c40f; }
.score-bar-fill.warn { background: #e67e22; }
.score-bar-fill.ng { background: #e74c3c; }

.advice-card {
  padding: 24px;
  margin-bottom: 16px;
  background: #fffbe6;
  border-left: 6px solid #f39c12;
  border-radius: 8px;
}

.advice-priority {
  display: inline-block;
  padding: 4px 12px;
  background: #f39c12;
  color: white;
  border-radius: 4px;
  font-size: 14px;
  font-weight: bold;
  margin-bottom: 12px;
}

.advice-title {
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 16px;
  color: #2c3e50;
}

.advice-current,
.advice-target {
  font-size: 16px;
  margin-bottom: 6px;
  color: #555;
}

.advice-target {
  color: #27ae60;
  font-weight: bold;
}

.advice-how {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed #ddd;
}

.advice-how-label {
  font-size: 16px;
  font-weight: bold;
  margin-bottom: 8px;
}

.advice-how ul {
  margin-left: 20px;
  font-size: 16px;
  color: #555;
  line-height: 2;
}

.action-buttons {
  text-align: center;
  margin-top: 40px;
}

.result-footer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid #eee;
  text-align: center;
}

.result-footer p {
  font-size: 14px;
  color: #888;
  line-height: 2;
}

.error-box {
  text-align: center;
  padding: 60px 20px;
}

.error-box h2 {
  font-size: 28px;
  color: #e74c3c;
  margin-bottom: 20px;
}

.error-message {
  font-size: 18px;
  color: #555;
  margin-bottom: 30px;
  padding: 20px;
  background: #fdedec;
  border-radius: 8px;
}

@media (max-width: 600px) {
  html { font-size: 16px; }
  .container { padding: 20px 16px; }
  .hero h1 { font-size: 26px; }
  .total-score #total-score { font-size: 56px; }
  .judgment-icon { font-size: 48px; }
}

@media print {
  body { background: white; }
  .container { box-shadow: none; }
  .action-buttons, .btn-primary { display: none; }
}

.raw-stats {
  background: #f8f9fa;
  padding: 16px 20px;
  border-radius: 8px;
  font-size: 14px;
  color: #666;
  line-height: 2;
}

.raw-stats a {
  color: #3498db;
}

/* ===== 拡張機能インストール案内画面 ===== */

.install-box {
  padding: 30px 20px;
  background: linear-gradient(135deg, #ebf3fb 0%, #d6e9f8 100%);
  border-radius: 12px;
  border: 2px solid #3498db;
}

.install-box h2 {
  font-size: 24px;
  color: #2c3e50;
  margin-bottom: 16px;
  text-align: center;
}

.install-lead {
  font-size: 16px;
  color: #555;
  line-height: 1.9;
  margin-bottom: 30px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 8px;
}

.install-steps {
  margin: 30px 0;
}

.install-step {
  display: flex;
  align-items: flex-start;
  margin-bottom: 24px;
  padding: 20px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.install-step-num {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: #3498db;
  color: white;
  font-size: 26px;
  font-weight: bold;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 20px;
}

.install-step-body {
  flex: 1;
}

.install-step-body h3 {
  font-size: 18px;
  color: #2c3e50;
  margin-bottom: 8px;
}

.install-step-body p {
  font-size: 15px;
  color: #555;
  line-height: 1.8;
  margin-bottom: 12px;
}

.install-btn {
  display: inline-block;
  padding: 16px 32px;
  font-size: 18px;
  font-weight: bold;
  color: white;
  background: linear-gradient(135deg, #27ae60, #229954);
  border: none;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(39, 174, 96, 0.3);
  transition: transform 0.1s;
}

.install-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(39, 174, 96, 0.4);
}

.install-faq {
  margin-top: 16px;
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 8px;
  font-size: 15px;
  color: #555;
}

.install-faq summary {
  cursor: pointer;
  font-weight: bold;
  color: #2c3e50;
  padding: 6px 0;
  font-size: 16px;
}

.install-faq summary:hover {
  color: #3498db;
}

.install-faq p,
.install-faq ol {
  margin-top: 12px;
  line-height: 1.9;
}

.install-faq ol {
  padding-left: 24px;
}

.install-faq li {
  margin-bottom: 4px;
}

.install-faq code {
  background: #f0f0f0;
  padding: 2px 6px;
  border-radius: 3px;
  font-family: monospace;
  font-size: 14px;
}

/* ===== 拡張機能ステータスバッジ ===== */

.extension-status {
  display: inline-block;
  padding: 6px 14px;
  margin-bottom: 20px;
  font-size: 14px;
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
  border-radius: 16px;
}