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

/* ===== Light mode ===== */
:root {
  --bg:              #faf5ef;
  --bg-elevated:     #ffffff;
  --bg-nav:          rgba(250, 245, 239, 0.85);
  --bg-icon:         #f3ebe1;

  --text:            #1c1310;
  --text-secondary:  #5e4d3c;
  --text-tertiary:   #634f3b;

  --border:          #e6dcd0;
  --border-light:    #efe7dd;

  --btn-primary-bg:    #2c2018;
  --btn-primary-text:  #faf5ef;
  --btn-secondary-bg:  transparent;
  --btn-secondary-text:#1c1310;
  --btn-secondary-border: #d4c8b8;

  --icon-stroke:     #7a5c38;
  --accent:          #6e4c1c;

  --mark-from:       #f0c040;
  --mark-to:         #d4940a;
}

/* ===== Dark mode ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --bg:              #151010;
    --bg-elevated:     #201816;
    --bg-nav:          rgba(21, 16, 16, 0.85);
    --bg-icon:         #2a2018;

    --text:            #f0e6da;
    --text-secondary:  #baa892;
    --text-tertiary:   #aba49a;

    --border:          #342a24;
    --border-light:    #2a2220;

    --btn-primary-bg:    #f0e4d6;
    --btn-primary-text:  #151010;
    --btn-secondary-bg:  #302820;
    --btn-secondary-text:#d4c4b0;
    --btn-secondary-border: #302820;

    --icon-stroke:     #d4b888;
    --accent:          #d4b888;

    --mark-from:       #f0c040;
    --mark-to:         #d4940a;
  }
}

html {
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
}

/* --- Nav --- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
}

.nav-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: var(--text);
}

.nav-mark {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 38%, var(--mark-from), var(--mark-to));
  box-shadow: 0 0 0 1px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.08);
}

.nav-name {
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--text);
}

/* --- Focus --- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --- Sections --- */
section {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* --- Hero --- */
.hero {
  padding-top: 6rem;
  padding-bottom: 5rem;
  text-align: center;
}

.hero-mark {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 38%, var(--mark-from), var(--mark-to));
  box-shadow: 0 0 0 1px rgba(0,0,0,0.04), 0 2px 8px rgba(0,0,0,0.1);
  margin: 0 auto 2rem;
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
  color: var(--text);
  max-width: 600px;
  margin: 0 auto;
}

.hero p {
  font-size: 1.1875rem;
  color: var(--text-secondary);
  margin-top: 1rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* --- Divider --- */
.divider {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 2rem;
}

.divider hr {
  border: none;
  border-top: 1px solid var(--border);
}

/* --- Product --- */
.product {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.section-label {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.product h2 {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.product > p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.feature-card {
  background: var(--bg-elevated);
  padding: 1.75rem;
}

.feature-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--bg-icon);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.feature-icon svg {
  width: 16px;
  height: 16px;
  stroke: var(--icon-stroke);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.375rem;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* --- About --- */
.about {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.about h2 {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.about p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
}

.about p + p {
  margin-top: 1rem;
}

/* --- Contact --- */
.contact {
  padding-top: 4rem;
  padding-bottom: 6rem;
}

.contact-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-elevated);
  padding: 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.contact-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 0.375rem;
}

.contact-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.contact-email {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--btn-secondary-text);
  text-decoration: none;
  padding: 0.625rem 1.25rem;
  border: 1px solid var(--btn-secondary-border);
  border-radius: 8px;
  background: var(--btn-secondary-bg);
  transition: border-color 0.15s, background 0.15s;
}

.contact-email:hover {
  border-color: var(--text-tertiary);
  background: var(--bg-icon);
}

/* --- Page content (template) --- */
.page-content {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.page-content h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.page-content p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.7;
}

.page-content p + p {
  margin-top: 1rem;
}

/* --- Legal content --- */
.legal {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.legal h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.legal .last-updated {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  font-style: italic;
  margin-bottom: 2.5rem;
}

.legal h2 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.legal p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.75;
  margin-bottom: 1rem;
}

.legal ul {
  max-width: 640px;
  margin: 0 0 1rem 1.25rem;
  padding: 0;
}

.legal li {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 0.375rem;
}

.legal strong {
  color: var(--text);
  font-weight: 600;
}

.legal a {
  color: var(--accent);
  text-decoration: underline;
}

.legal a:hover {
  color: var(--text);
}

/* --- Footer --- */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
}

.footer-inner {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-left {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color 0.15s;
}

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

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

  .hero h1 {
    font-size: 2rem;
  }

  .product h2, .about h2 {
    font-size: 1.5rem;
  }

  .contact-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }

  .page-content h1,
  .legal h1 {
    font-size: 1.5rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.75rem;
  }

  .nav-links {
    gap: 1.25rem;
  }
}

@media (max-width: 480px) {
  .hero {
    padding-top: 4rem;
    padding-bottom: 3rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .page-content,
  .legal {
    padding-top: 3rem;
    padding-bottom: 3rem;
  }

  section, .divider {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .nav-inner {
    padding: 0 1.25rem;
  }
}