/* Palette derived from MonoFlick app icon (tmp/monoflick_icon/icon_master.svg):
   background gradient #7A98A9 → #68889C, orange #E6781E, green #10B981. */
:root {
  --bg-start: #7A98A9;
  --bg-end: #68889C;
  --bg-solid: #7398A9;
  --on-bg: #ffffff;
  --on-bg-muted: rgba(255, 255, 255, 0.78);
  --border: rgba(255, 255, 255, 0.18);
  --accent: #E6781E;
  --accent-hover: #D26910;
  --accent-soft: rgba(230, 120, 30, 0.22);
  --accent-2: #10B981;
  --accent-2-hover: #0E9F71;
  --card-bg: #ffffff;
  --card-fg: #1a1a1a;
  --card-muted: #6a6a6a;
  --card-border: rgba(0, 0, 0, 0.06);
  --shadow: 0 1px 2px rgba(0,0,0,0.08), 0 16px 40px rgba(0,0,0,0.18);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg-start: #3d4d58;
    --bg-end: #2d3a44;
    --bg-solid: #3a4a55;
    --on-bg: #f0f0f3;
    --on-bg-muted: rgba(240, 240, 243, 0.72);
    --border: rgba(255, 255, 255, 0.1);
    --accent: #FF8A3D;
    --accent-hover: #FF7A1E;
    --accent-soft: rgba(255, 138, 61, 0.18);
    --accent-2: #34D399;
    --accent-2-hover: #1FB87F;
    --card-bg: #1f2026;
    --card-fg: #f0f0f3;
    --card-muted: #9a9aa1;
    --card-border: rgba(255, 255, 255, 0.06);
    --shadow: 0 1px 2px rgba(0,0,0,0.4), 0 12px 32px rgba(0,0,0,0.35);
  }
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: linear-gradient(180deg, var(--bg-start) 0%, var(--bg-end) 100%);
  background-attachment: fixed;
  color: var(--on-bg);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Segoe UI", Roboto, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--on-bg);
  text-decoration: none;
}
a:hover { text-decoration: underline; }
img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ===== Nav ===== */
.nav {
  border-bottom: 1px solid var(--border);
  background: rgba(115, 152, 169, 0.78);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
}
.nav-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.95rem;
}
.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--on-bg);
}
.nav-brand img {
  width: 28px;
  height: 28px;
  display: block;
}
.nav-links a {
  margin-left: 20px;
  color: var(--on-bg-muted);
}
.nav-links a:hover { color: var(--on-bg); text-decoration: none; }

/* ===== Container ===== */
.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}
section {
  padding: 72px 0;
}
section + section { border-top: 1px solid var(--border); }

/* ===== Hero ===== */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding-top: 80px;
  padding-bottom: 96px;
}
.hero-text h1 {
  font-size: 2.8rem;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
  line-height: 1.25;
}
.hero-text .lead {
  font-size: 1.15rem;
  color: var(--on-bg-muted);
  margin: 0 0 28px;
}
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid var(--border);
  color: var(--on-bg);
  background: rgba(255, 255, 255, 0.08);
  transition: transform 0.06s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn:hover {
  text-decoration: none;
  background: rgba(255, 255, 255, 0.16);
  box-shadow: var(--shadow);
}
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.hero-img {
  text-align: center;
}
.hero-img img {
  margin: 0 auto;
  max-width: 420px;
}

/* ===== Section heading ===== */
.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-head .eyebrow {
  display: inline-block;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.section-head h2 {
  font-size: 2rem;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
  color: var(--on-bg);
}
.section-head p {
  color: var(--on-bg-muted);
  margin: 0;
}

/* ===== Card grid ===== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 28px 24px;
  box-shadow: var(--shadow);
  text-align: center;
  color: var(--card-fg);
}
.card img {
  margin: 0 auto 16px;
  max-width: 180px;
  height: 160px;
  object-fit: contain;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  color: var(--card-fg);
}
.card p {
  margin: 0;
  color: var(--card-muted);
  font-size: 0.95rem;
}

/* ===== Connectivity ===== */
.connect {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.connect-img img { max-width: 380px; margin: 0 auto; }
.connect h2 {
  font-size: 1.8rem;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
  color: var(--on-bg);
}
.connect ul {
  padding-left: 1.2em;
  margin: 0 0 16px;
  color: var(--on-bg);
}
.connect li { margin: 6px 0; }
.connect .note {
  color: var(--on-bg-muted);
  font-size: 0.9rem;
}

/* ===== Privacy ===== */
.privacy {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 48px 40px;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 40px;
  align-items: center;
  box-shadow: var(--shadow);
  color: var(--card-fg);
}
.privacy img { max-width: 200px; margin: 0 auto; }
.privacy h2 {
  font-size: 1.8rem;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
  color: var(--card-fg);
}
.privacy ul {
  padding-left: 1.2em;
  margin: 0 0 16px;
  color: var(--card-fg);
}
.privacy li { margin: 4px 0; }
.privacy .btn {
  background: var(--accent-2);
  color: #ffffff;
  border-color: var(--accent-2);
}
.privacy .btn:hover {
  background: var(--accent-2-hover);
  border-color: var(--accent-2-hover);
}

/* ===== Requirements ===== */
.req {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 640px;
  margin: 0 auto;
}
.req .card { padding: 24px; text-align: left; }
.req .card .label {
  font-size: 0.8rem;
  color: var(--card-muted);
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}
.req .card .value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--card-fg);
}
.req .card .download {
  display: block;
  width: fit-content;
  margin-top: 12px;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s ease;
}
.req .card .download:hover {
  background: var(--accent-hover);
  text-decoration: none;
}
.req .card .guide-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 8px;
  padding: 7px 13px;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  background: transparent;
  color: var(--card-fg);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.req .card .guide-link::after { content: "→"; opacity: 0.7; }
.req .card .guide-link:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* ===== English summary ===== */
.en-summary {
  text-align: center;
  color: var(--on-bg-muted);
  font-size: 0.95rem;
  max-width: 640px;
  margin: 0 auto;
}
.en-summary h2 {
  color: var(--on-bg);
  font-size: 1.4rem;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.en-summary a { color: var(--on-bg); text-decoration: underline; }

/* ===== Footer ===== */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--on-bg-muted);
  font-size: 0.85rem;
}
footer a { color: var(--on-bg-muted); text-decoration: underline; }
footer a:hover { color: var(--on-bg); }
footer .credit {
  margin-top: 8px;
  font-size: 0.8rem;
}

/* ===== Responsive ===== */
@media (max-width: 760px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 48px;
    padding-bottom: 56px;
    text-align: center;
  }
  .hero-text h1 { font-size: 2.1rem; }
  .hero-img { order: -1; }
  .hero-img img { max-width: 280px; }
  .cta { justify-content: center; }
  section { padding: 56px 0; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .connect { grid-template-columns: 1fr; gap: 32px; text-align: center; }
  .privacy { grid-template-columns: 1fr; text-align: center; padding: 32px 24px; }
  .req { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 1.6rem; }
  .nav-links a { margin-left: 12px; font-size: 0.85rem; }
}