:root {
  --pink-1: #ff4d8d;
  --pink-2: #ff7eb3;
  --pink-3: #ffd1e0;
  --bg: #fff5f8;
  --ink: #1a1a1a;
  --muted: #6b6b6b;
  --line: #ffd9e5;
  --card: #ffffff;
  --shadow: 0 10px 30px rgba(255, 77, 141, 0.15);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 245, 248, 0.85);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  font-size: 1.1rem;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
}

.nav-links {
  display: flex;
  gap: 18px;
  list-style: none;
}

.nav-links a {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
  opacity: 0.85;
}

.nav-links a:hover { color: var(--pink-1); opacity: 1; }

@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* Hero */
.hero {
  padding: 64px 0 48px;
  text-align: center;
  background:
    radial-gradient(circle at 20% 0%, rgba(255, 126, 179, 0.25), transparent 50%),
    radial-gradient(circle at 80% 10%, rgba(255, 77, 141, 0.18), transparent 60%);
}

.hero-logo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--pink-1), #ff8aa8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 14px;
}

.hero p {
  max-width: 640px;
  margin: 0 auto 32px;
  color: var(--muted);
  font-size: 1.05rem;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--pink-1), var(--pink-2));
  color: #fff;
  padding: 14px 28px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease;
}

.cta:hover { transform: translateY(-2px); }

/* Features */
.features {
  padding: 56px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.feature {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
}

.feature .icon {
  font-size: 1.6rem;
  margin-bottom: 10px;
}

.feature h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

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

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 32px 0;
  margin-top: 40px;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
  align-items: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  list-style: none;
}

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

.footer-links a:hover { color: var(--pink-1); }

.copyright {
  color: var(--muted);
  font-size: 0.85rem;
}

/* Document pages (privacy, terms, etc.) */
.doc {
  padding: 48px 0 64px;
}

.doc h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.doc .meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.doc h2 {
  margin: 28px 0 10px;
  font-size: 1.25rem;
}

.doc h3 {
  margin: 18px 0 8px;
  font-size: 1.05rem;
}

.doc p, .doc li {
  color: #2a2a2a;
  margin-bottom: 10px;
}

.doc ul, .doc ol {
  padding-left: 22px;
  margin-bottom: 12px;
}

.doc a { color: var(--pink-1); }

/* Forms */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  box-shadow: var(--shadow);
  max-width: 560px;
  margin: 24px auto 0;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  outline: none;
  transition: border-color 0.15s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--pink-1);
}

.form-group textarea {
  resize: vertical;
  min-height: 96px;
}

.form-group .checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--muted);
}

.form-group .checkbox input {
  width: auto;
  margin-top: 3px;
}

.btn {
  background: linear-gradient(135deg, var(--pink-1), var(--pink-2));
  color: #fff;
  border: 0;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  width: 100%;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.alert {
  padding: 14px 16px;
  border-radius: 12px;
  margin-top: 16px;
  font-size: 0.95rem;
}

.alert-success {
  background: #e8fff1;
  color: #11713a;
  border: 1px solid #b5f0c8;
}

.alert-warn {
  background: #fff5e6;
  color: #8a4a00;
  border: 1px solid #ffd9a8;
}

.hidden { display: none; }

/* Notice box */
.notice {
  background: #fff;
  border-left: 4px solid var(--pink-1);
  padding: 14px 16px;
  border-radius: 8px;
  margin: 16px 0;
  color: #2a2a2a;
}