/* ============================================================
   SEO & GEO Analyzer — Apple-Style Design System
   ============================================================ */

/* --- Design Tokens --- */
:root {
  --color-bg: #f5f5f7;
  --color-surface: #ffffff;
  --color-text-primary: #1d1d1f;
  --color-text-secondary: #6e6e73;
  --color-accent: #0071e3;
  --color-accent-hover: #0077ed;
  --color-success: #34c759;
  --color-warning: #ff9f0a;
  --color-error: #ff3b30;
  --color-border: rgba(0, 0, 0, 0.08);

  --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display",
                 "SF Pro Text", "Inter", "Segoe UI", sans-serif;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.10);

  --transition-smooth: 0.35s cubic-bezier(0.28, 0.11, 0.32, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #000000;
    --color-surface: #1c1c1e;
    --color-text-primary: #f5f5f7;
    --color-text-secondary: #a1a1a6;
    --color-border: rgba(255, 255, 255, 0.1);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.4);
  }
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

/* --- Layout --- */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Header / Brand --- */
.site-header {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 28px 24px 10px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.site-header__logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 50%;
  padding: 4px;
  background: #ffffff;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.06);
}

.site-header__name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #111827;
  letter-spacing: 0.01em;
}

/* --- Hero Section --- */
.hero {
  text-align: center;
  padding: 30px 24px 60px;
  position: relative;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 113, 227, 0.08);
  color: var(--color-accent);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.hero__logo {
  width: 24px;
  height: 24px;
  object-fit: contain;
  border-radius: 6px;
  display: inline-block;
  filter: brightness(0) invert(1);
}

.hero__logo-fallback {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--color-accent), #7b61ff);
  color: white;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: var(--color-text-secondary);
  max-width: 720px;
  margin: 0 auto 24px;
  font-weight: 400;
  line-height: 1.6;
}

.hero__highlights {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.hero__pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(0, 113, 227, 0.08);
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 600;
}

/* --- SEO Section --- */
.seo-section {
  padding: 24px 0 64px;
}

.seo-section__intro {
  max-width: 760px;
  margin: 0 auto 28px;
  text-align: center;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 10px;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.seo-section__intro h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.seo-section__intro p {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.seo-section__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.feature-card h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.feature-card p {
  color: var(--color-text-secondary);
  line-height: 1.6;
  font-size: 0.95rem;
}

/* --- Form --- */
.form-wrapper {
  max-width: 640px;
  margin: 0 auto;
}

.input-group {
  display: flex;
  gap: 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 6px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

.input-group:focus-within {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card-hover), 0 0 0 4px rgba(0, 113, 227, 0.12);
}

.input-group__input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 1.0625rem;
  font-family: var(--font-family);
  color: var(--color-text-primary);
  padding: 14px 16px;
  outline: none;
}

.input-group__input::placeholder {
  color: var(--color-text-secondary);
  opacity: 0.7;
}

.input-group__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-accent);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: background var(--transition-smooth), transform var(--transition-smooth);
  white-space: nowrap;
}

.input-group__btn:hover {
  background: var(--color-accent-hover);
  transform: scale(1.02);
}

.input-group__btn:active {
  transform: scale(0.98);
}

.input-group__btn svg {
  width: 18px;
  height: 18px;
}

/* --- Loading Skeleton --- */
.loading-container {
  display: none;
  padding: 40px 0;
}

.loading-container.is-visible {
  display: block;
  animation: fadeInUp 0.5s ease-out;
}

.skeleton-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.skeleton-line {
  height: 16px;
  background: linear-gradient(90deg, var(--color-border) 25%, rgba(0,0,0,0.04) 50%, var(--color-border) 75%);
  background-size: 200% 100%;
  border-radius: 8px;
  animation: shimmer 1.8s ease-in-out infinite;
  margin-bottom: 12px;
}

.skeleton-line--short { width: 40%; }
.skeleton-line--medium { width: 70%; }
.skeleton-line--long { width: 90%; }

.skeleton-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(90deg, var(--color-border) 25%, rgba(0,0,0,0.04) 50%, var(--color-border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.8s ease-in-out infinite;
  margin: 20px auto;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- Result Section --- */
.result-container {
  padding: 0 0 80px;
}

.result-header {
  text-align: center;
  margin-bottom: 40px;
  animation: fadeInUp 0.6s ease-out;
}

.result-header__url {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.result-header__title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* --- Cards --- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
  animation: fadeInUp 0.6s ease-out both;
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
}

.card__header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.card__icon--robots { background: rgba(0, 113, 227, 0.1); color: var(--color-accent); }
.card__icon--sitemap { background: rgba(52, 199, 89, 0.1); color: var(--color-success); }
.card__icon--seo { background: rgba(255, 159, 10, 0.1); color: var(--color-warning); }
.card__icon--geo { background: rgba(175, 82, 222, 0.1); color: #af52de; }
.card__icon--ai { background: linear-gradient(135deg, rgba(0, 113, 227, 0.1), rgba(175, 82, 222, 0.1)); color: var(--color-accent); }

.card__title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card__subtitle {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* --- Score Circle --- */
.score-section {
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.score-circle {
  position: relative;
  width: 140px;
  height: 140px;
  flex-shrink: 0;
}

.score-circle__svg {
  width: 140px;
  height: 140px;
  transform: rotate(-90deg);
}

.score-circle__bg {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 8;
}

.score-circle__progress {
  fill: none;
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 377;
  stroke-dashoffset: 377;
  transition: stroke-dashoffset 1.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.score-circle__progress--good { stroke: var(--color-success); }
.score-circle__progress--warning { stroke: var(--color-warning); }
.score-circle__progress--error { stroke: var(--color-error); }

.score-circle__value {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.score-circle__number {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.score-circle__label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

.score-details {
  flex: 1;
  min-width: 200px;
}

/* --- Check Items --- */
.check-list {
  list-style: none;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.check-item:last-child {
  border-bottom: none;
}

.check-item__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 1px;
}

.check-item__badge--good {
  background: rgba(52, 199, 89, 0.12);
  color: var(--color-success);
}

.check-item__badge--warning {
  background: rgba(255, 159, 10, 0.12);
  color: var(--color-warning);
}

.check-item__badge--error {
  background: rgba(255, 59, 48, 0.12);
  color: var(--color-error);
}

.check-item__badge svg {
  width: 14px;
  height: 14px;
}

.check-item__content {
  flex: 1;
}

.check-item__name {
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 2px;
}

.check-item__message {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.check-item__detail {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  opacity: 0.7;
  margin-top: 4px;
  font-family: "SF Mono", "Fira Code", monospace;
  word-break: break-all;
}

/* --- Crawler Grid --- */
.crawler-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.crawler-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  font-size: 0.875rem;
  font-weight: 500;
}

.crawler-item__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.crawler-item__dot--allowed { background: var(--color-success); }
.crawler-item__dot--blocked { background: var(--color-error); }

/* --- AI Recommendation Card --- */
.card--ai {
  border: 1px solid transparent;
  background: linear-gradient(var(--color-surface), var(--color-surface)) padding-box,
              linear-gradient(135deg, rgba(0, 113, 227, 0.3), rgba(175, 82, 222, 0.3)) border-box;
  position: relative;
  overflow: hidden;
}

.card--ai::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), #af52de, var(--color-accent));
  background-size: 200% 100%;
  animation: gradientShift 3s ease-in-out infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.ai-content {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text-primary);
}

.ai-content h1, .ai-content h2, .ai-content h3 {
  margin-top: 20px;
  margin-bottom: 8px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.ai-content h2 { font-size: 1.125rem; }
.ai-content h3 { font-size: 1rem; }

.ai-content ul, .ai-content ol {
  padding-left: 20px;
  margin: 8px 0;
}

.ai-content li {
  margin-bottom: 6px;
}

.ai-content strong {
  font-weight: 600;
}

.ai-content p {
  margin-bottom: 10px;
}

/* --- Sitemap Info Grid --- */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.info-item {
  padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  text-align: center;
}

.info-item__value {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

.info-item__label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* --- Error State --- */
.error-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
  box-shadow: var(--shadow-card);
  animation: fadeInUp 0.6s ease-out;
}

.error-card__icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.error-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.error-card__message {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.6;
}

/* --- Warning Banner --- */
.warning-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 159, 10, 0.08);
  border: 1px solid rgba(255, 159, 10, 0.2);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 20px;
  font-size: 0.875rem;
  color: var(--color-text-primary);
  animation: fadeInUp 0.4s ease-out;
}

.warning-banner__icon {
  font-size: 1.125rem;
  flex-shrink: 0;
}

/* --- Footer --- */
.footer {
  text-align: center;
  padding: 40px 24px;
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card:nth-child(1) { animation-delay: 0s; }
.card:nth-child(2) { animation-delay: 0.08s; }
.card:nth-child(3) { animation-delay: 0.16s; }
.card:nth-child(4) { animation-delay: 0.24s; }
.card:nth-child(5) { animation-delay: 0.32s; }

/* --- Responsive --- */
@media (max-width: 640px) {
  .hero { padding: 48px 16px 36px; }
  .input-group { flex-direction: column; padding: 8px; }
  .input-group__btn { justify-content: center; }
  .score-section { flex-direction: column; align-items: center; text-align: center; }
  .card { padding: 24px; }
  .crawler-grid { grid-template-columns: 1fr; }
  .seo-section__grid { grid-template-columns: 1fr; }
}