/* ==========================================================
   SnapDesk landing page
   Mirrors the in-app aesthetic: matte ink base + iris primary
   + multi-color section accents (champagne / cyan / rose /
   emerald) + glass morphism panels + aurora background.
   Single CSS file, no build step — drop on Cloudflare Pages.
   ========================================================== */

:root {
  /* Base palette (same as App.css :root) */
  --bg-base-top:    #1A1A28;
  --bg-base-bottom: #08080C;

  --iris:        #9D8DF1;
  --iris-strong: #B5A8FF;
  --iris-mist:   rgba(157, 141, 241, 0.08);
  --iris-soft:   rgba(157, 141, 241, 0.16);
  --iris-border: rgba(157, 141, 241, 0.34);
  --iris-glow:   rgba(157, 141, 241, 0.30);

  --champagne:      #D9C39E;
  --champagne-soft: rgba(217, 195, 158, 0.18);
  --cyan:           #5EEAD4;
  --cyan-soft:      rgba(94, 234, 212, 0.18);
  --rose:           #F472B6;
  --rose-soft:      rgba(244, 114, 182, 0.18);
  --emerald:        #34D399;
  --emerald-soft:   rgba(52, 211, 153, 0.18);

  --text-primary:   #ECEDF1;
  --text-secondary: rgba(236, 237, 241, 0.72);
  --text-tertiary:  rgba(236, 237, 241, 0.50);

  --hairline: rgba(255, 255, 255, 0.06);
  --border:   rgba(255, 255, 255, 0.12);

  --r-sm:   9px;
  --r-md:   13px;
  --r-lg:   20px;
  --r-pill: 999px;

  --font-ui: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Helvetica Neue", Arial, sans-serif;
  --font-display: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Hiragino Sans", sans-serif;
  --font-mono: "SF Mono", "Menlo", monospace;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: linear-gradient(180deg, var(--bg-base-top) 0%, var(--bg-base-bottom) 100%);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0.005em;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* ── Aurora ────────────────────────────────────────────── */
.aurora {
  position: fixed;
  inset: -10%;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(36% 28% at 18% 14%, rgba(157, 141, 241, 0.32), transparent 65%),
    radial-gradient(34% 26% at 82% 86%, rgba(217, 195, 158, 0.18), transparent 65%),
    radial-gradient(30% 24% at 78% 18%, rgba(244, 114, 182, 0.16), transparent 65%),
    radial-gradient(38% 30% at 22% 88%, rgba(16, 185, 129, 0.16), transparent 65%);
  filter: blur(60px);
  opacity: 0.85;
  animation: aurora-drift 36s ease-in-out infinite alternate;
}

@keyframes aurora-drift {
  0%   { transform: translate(0%, 0%)     rotate(0deg); }
  100% { transform: translate(2.5%, -2%)  rotate(0.6deg); }
}

body > *:not(.aurora) {
  position: relative;
  z-index: 1;
}

/* ── Hero ──────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 120px 24px 80px;
  max-width: 760px;
  margin: 0 auto;
}

.hero-icon {
  width: 120px;
  height: 120px;
  border-radius: 26px;
  box-shadow:
    0 8px 30px rgba(0, 0, 0, 0.45),
    0 0 60px rgba(157, 141, 241, 0.22);
  margin-bottom: 28px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(48px, 8vw, 80px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 12px;
  background: linear-gradient(180deg, #FFFFFF 0%, #C0BAEB 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-tagline {
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 500;
  color: var(--text-primary);
  margin: 0 0 12px;
  letter-spacing: 0.005em;
}

.hero-subline {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.btn-download {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 18px 42px;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--iris-strong) 0%, var(--iris) 100%);
  color: #0B0B11;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.30),
    0 8px 32px rgba(157, 141, 241, 0.40),
    0 0 0 1px var(--iris-strong);
  transition: transform 180ms ease, box-shadow 200ms ease;
}

.btn-download:hover {
  transform: translateY(-2px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.34),
    0 12px 42px rgba(181, 168, 255, 0.55),
    0 0 0 1px var(--iris-strong);
}

.btn-label {
  font-size: 17px;
  font-family: var(--font-display);
  letter-spacing: 0.06em;
}

.btn-meta {
  font-size: 11px;
  font-weight: 500;
  font-family: var(--font-mono);
  opacity: 0.7;
  letter-spacing: 0.04em;
}

.hero-note {
  margin-top: 18px;
  font-size: 12px;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
}

/* ── Sections ──────────────────────────────────────────── */
section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 60px 24px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 36px;
  text-align: center;
  color: var(--text-primary);
}

/* ── Feature cards (4-up, multi-color glass) ──────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.feature-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 720px) {
  .feature-grid,
  .feature-grid-3 {
    grid-template-columns: 1fr;
  }
}

.card {
  position: relative;
  padding: 28px 26px;
  border-radius: var(--r-lg);
  background: rgba(11, 11, 17, 0.55);
  backdrop-filter: blur(24px) saturate(140%);
  -webkit-backdrop-filter: blur(24px) saturate(140%);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 180ms ease, box-shadow 200ms ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45);
}

.card-accent {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
  background: var(--card-accent-color, var(--iris));
  box-shadow: 0 0 20px var(--card-accent-color, var(--iris));
}

.card.cat-iris      { --card-accent-color: var(--iris); }
.card.cat-cyan      { --card-accent-color: var(--cyan); }
.card.cat-champagne { --card-accent-color: var(--champagne); }
.card.cat-rose      { --card-accent-color: var(--rose); }
.card.cat-emerald   { --card-accent-color: var(--emerald); }

.card-title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--text-primary);
  letter-spacing: 0.005em;
}

.card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.7;
}

/* Mini cards (3-up secondary feature row) */
.card-mini {
  padding: 22px 20px;
  border-radius: var(--r-md);
  background: rgba(11, 11, 17, 0.40);
  backdrop-filter: blur(16px) saturate(130%);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  border: 1px solid var(--hairline);
}

.card-mini h4 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--text-primary);
}

.card-mini p {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.65;
}

/* ── Install section ─────────────────────────────────── */
.install {
  max-width: 760px;
}

.install-note {
  background: rgba(252, 216, 160, 0.08);
  border: 1px solid rgba(252, 216, 160, 0.30);
  border-radius: var(--r-md);
  padding: 16px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

.install-note strong {
  color: #FCD8A0;
  font-weight: 700;
}

.install-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.install-steps li {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 22px 24px;
  background: rgba(11, 11, 17, 0.45);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--iris-soft);
  border: 1px solid var(--iris-border);
  color: var(--iris-strong);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-body {
  flex: 1;
  min-width: 0;
}

.step-body h4 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text-primary);
}

.step-body p {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.step-meta {
  margin-top: 8px !important;
  font-size: 12px !important;
  color: var(--text-tertiary) !important;
  font-family: var(--font-mono);
}

.install-options {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.install-options li {
  padding: 0;
  background: none;
  border: none;
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  backdrop-filter: none;
}

.install-options strong {
  color: var(--iris-strong);
  font-weight: 600;
}

.btn-download-secondary {
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--iris-strong) 0%, var(--iris) 100%);
  color: #0B0B11;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.30),
    0 4px 18px rgba(157, 141, 241, 0.30);
  transition: transform 160ms ease;
}

.btn-download-secondary:hover { transform: translateY(-1px); }

code {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 2px 7px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 5px;
  border: 1px solid var(--hairline);
  color: var(--text-primary);
}

kbd {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 7px;
  background: rgba(255, 255, 255, 0.10);
  border-radius: 5px;
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-weight: 600;
}

/* ── Shortcuts table ─────────────────────────────────── */
.shortcuts {
  max-width: 760px;
}

.shortcut-table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(11, 11, 17, 0.45);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  overflow: hidden;
}

.shortcut-table th,
.shortcut-table td {
  padding: 12px 18px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid var(--hairline);
}

.shortcut-table tr:last-child th,
.shortcut-table tr:last-child td {
  border-bottom: none;
}

.shortcut-table th {
  font-weight: 500;
  color: var(--iris-strong);
  width: 38%;
}

.shortcut-table td { color: var(--text-secondary); }

/* ── Footer ─────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: 60px 24px 40px;
  margin-top: 40px;
  border-top: 1px solid var(--hairline);
}

.footer-line {
  margin: 0 0 6px;
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer-meta {
  margin-top: 12px;
  font-size: 12px;
}

.footer a {
  color: var(--iris-strong);
  text-decoration: none;
}

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

.footer-nav {
  margin-bottom: 16px;
  font-size: 13px;
}

.footer-nav a {
  color: var(--text-secondary);
}

.footer-sep {
  margin: 0 8px;
  color: var(--text-tertiary);
}

/* ── サブページ共通スタイル ─────────────────────────────────── */
/* /changelog, /privacy などで使う */

.subpage-header {
  max-width: 720px;
  margin: 0 auto;
  padding: 80px 24px 32px;
  text-align: center;
}

.subpage-header .home-link {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--text-tertiary);
  font-size: 13px;
  text-decoration: none;
}

.subpage-header .home-link:hover {
  color: var(--iris-strong);
}

.subpage-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.subpage-subline {
  margin: 0;
  color: var(--text-secondary);
  font-size: 15px;
}

.subpage-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 24px 60px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
}

.subpage-body h2 {
  margin-top: 48px;
  margin-bottom: 12px;
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 8px;
}

.subpage-body h3 {
  margin-top: 28px;
  margin-bottom: 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.subpage-body ul {
  padding-left: 1.4em;
}

.subpage-body li {
  margin-bottom: 6px;
}

.subpage-body code {
  background: var(--iris-mist);
  border: 1px solid var(--iris-border);
  padding: 2px 6px;
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--iris-strong);
}

.subpage-body strong {
  color: var(--text-primary);
}

.changelog-version {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
}

.changelog-version:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.changelog-version-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--iris-strong);
  background: var(--iris-mist);
  border: 1px solid var(--iris-border);
  padding: 3px 10px;
  border-radius: var(--r-pill);
  margin-bottom: 8px;
}

.changelog-version-date {
  margin-left: 10px;
  font-size: 12px;
  color: var(--text-tertiary);
}