/* 日々記録 - LP サイト スタイル */

:root {
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #555;
  --color-border: #e0e0e0;
  --color-link: #2563eb;
  --color-link-hover: #1d4ed8;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  --max-width: 720px;
  --spacing: 1.5rem;
  --radius: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing) 0;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing);
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}

.nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.nav a {
  color: var(--color-link);
  text-decoration: none;
  font-size: 0.9rem;
}

.nav a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

/* Main */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem var(--spacing) 3rem;
}

/* Hero */
.hero {
  text-align: center;
  padding: 2rem 0 3rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  font-weight: 700;
}

.hero-lead {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

.hero-desc {
  margin: 0 0 2rem;
  max-width: 36em;
  margin-left: auto;
  margin-right: auto;
  color: var(--color-text);
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.hero-links a {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--color-link);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
}

.hero-links a:hover {
  background: var(--color-link-hover);
}

/* Sections */
.section {
  padding: 2rem 0;
  border-bottom: 1px solid var(--color-border);
}

.section:last-of-type {
  border-bottom: none;
}

.section h2 {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
  font-weight: 700;
  padding-top: 0.5rem;
}

.section h2::before {
  display: block;
  content: "";
  margin-top: -3rem;
  height: 3rem;
  visibility: hidden;
  pointer-events: none;
}

.updated {
  margin: 0 0 1.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.section h3 {
  margin: 1.75rem 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.section h3:first-of-type {
  margin-top: 0;
}

.section p,
.section ul {
  margin: 0 0 1rem;
}

.section ul {
  padding-left: 1.5rem;
}

.section li {
  margin-bottom: 0.35rem;
}

.section a {
  color: var(--color-link);
  text-decoration: none;
}

.section a:hover {
  text-decoration: underline;
}

.contact {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--color-bg);
  border-radius: var(--radius);
}

.contact a {
  word-break: break-all;
}

.note {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
}

/* Footer */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 2rem var(--spacing);
  text-align: center;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.footer-nav a {
  color: var(--color-link);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-nav a:hover {
  text-decoration: underline;
}

.copyright {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}