@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&family=DM+Sans:wght@400;500;700&display=swap');

:root {
  --color-primary: #2563EB;
  --color-primary-dark: #1D4ED8;
  --color-primary-light: #DBEAFE;
  --color-accent: #F59E0B;
  --color-bg: #F9F8F6;
  --color-text: #1a1a1a;
  --color-text-muted: #64748B;
  --color-border: #E4E4E0;
  --color-card: #FFFFFF;
  --color-success: #10B981;
  --color-danger: #EF4444;
  --radius: 10px;
  --radius-sm: 7px;
  --shadow: 0 1px 12px rgba(0,0,0,0.06);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --transition: 0.15s ease;
  --font-main: 'DM Sans', 'Noto Sans JP', sans-serif;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

/* header */
.site-header {
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.site-logo:hover { text-decoration: none; opacity: 0.9; }

.site-nav { display: flex; gap: 4px; flex-wrap: wrap; }

.site-nav a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* layout */
.page-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
  display: flex;
  gap: 32px;
  flex: 1;
  width: 100%;
}

.main-content { flex: 1; min-width: 0; max-width: 800px; }

.sidebar { width: 300px; flex-shrink: 0; }

.sidebar-sticky {
  position: sticky;
  top: 84px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* page hero */
.page-hero {
  margin-bottom: 28px;
}

.page-hero h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 8px;
}

.page-hero p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* card */
.card {
  background: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  border: 1px solid var(--color-border);
}

.card + .card { margin-top: 20px; }

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* forms */
.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="email"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
  background: #fff;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: #A0AEC0; }

.input-with-unit {
  display: flex;
  align-items: center;
  gap: 0;
}

.input-with-unit input {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  flex: 1;
}

.input-unit {
  background: var(--color-border);
  border: 1.5px solid var(--color-border);
  border-left: none;
  padding: 10px 12px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  white-space: nowrap;
}

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  min-height: 44px;
  min-width: 44px;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(37,99,235,0.3); }

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

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

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}

.btn-accent:hover { opacity: 0.9; }

.btn-block { width: 100%; }

.btn-group { display: flex; gap: 10px; flex-wrap: wrap; }

/* result box */
.result-box {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, #EFF6FF 100%);
  border: 1.5px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 24px;
}

.result-box.hidden { display: none; }

.result-main {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.result-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.result-item {
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  text-align: center;
}

.result-item .value {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
}

.result-item .label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* notice */
.notice {
  background: #FFF9E6;
  border: 1px solid #FCD34D;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.8rem;
  color: #92400E;
  margin-top: 16px;
}

.notice::before { content: '※ '; }

/* ad placeholders */
.ad-unit {
  position: relative;
  overflow: hidden;
}

.ad-placeholder {
  background: #F1F5F9;
  border: 1.5px dashed #CBD5E1;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: #94A3B8;
  font-weight: 500;
}

.ad-unit[data-ad-slot="sidebar-top"] .ad-placeholder { width: 300px; height: 250px; }
.ad-unit[data-ad-slot="sidebar-bottom"] .ad-placeholder { width: 300px; height: 600px; }
.ad-unit[data-ad-slot="content-bottom"] .ad-placeholder { width: 100%; height: 90px; max-width: 728px; }

.affiliate-unit .ad-placeholder { width: 100%; height: 120px; }

/* table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  margin-top: 16px;
}

.data-table th {
  background: var(--color-primary);
  color: #fff;
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
}

.data-table th:first-child { border-radius: var(--radius-sm) 0 0 0; }
.data-table th:last-child { border-radius: 0 var(--radius-sm) 0 0; }

.data-table td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:nth-child(even) td { background: var(--color-bg); }

.table-wrap {
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  overflow: hidden;
  overflow-x: auto;
}

/* footer */
.site-footer {
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  padding: 32px 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.footer-links a { color: var(--color-text-muted); font-size: 0.85rem; }
.footer-links a:hover { color: var(--color-primary); }

/* responsive */
@media (max-width: 1024px) {
  .sidebar { width: 260px; }
}

@media (max-width: 768px) {
  .header-inner { padding: 0 16px; }
  .site-nav { display: none; }
  .page-container { flex-direction: column; padding: 20px 16px; }
  .sidebar { display: none; }
  .main-content { max-width: 100%; }
  .page-hero h1 { font-size: 1.4rem; }
  .card { padding: 20px; }
  .ad-unit[data-ad-slot="content-bottom"] .ad-placeholder { height: 60px; }
}

@media (max-width: 480px) {
  .result-main { font-size: 1.5rem; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .btn { font-size: 0.85rem; padding: 10px 18px; }
}

/* utility */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: 0.875rem; }
.mt-4 { margin-top: 4px; }
.mt-8 { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }