/* ── KidneyKind Brand ─────────────────────────────────── */
:root {
  --teal:       #2EB7B3;
  --teal-dark:  #1A8C87;
  --coral:      #F58066;
  --bg:         #FAFAFA;
  --surface:    #FFFFFF;
  --text:       #1C1C1E;
  --text-muted: #6E6E73;
  --border:     #E5E5EA;
  --radius-sm:  10px;
  --radius-lg:  22px;
  --shadow:     0 4px 24px rgba(0,0,0,0.07);
}

/* ── Reset ────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Rounded", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Utilities ────────────────────────────────────────── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.gradient-text {
  background: linear-gradient(90deg, var(--teal), var(--teal-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--teal), var(--teal-dark));
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.section { padding: 80px 0; }
.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
}

/* ── Nav ──────────────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  padding: 14px 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}
.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}
.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
}
.nav-links a:hover { color: var(--teal); text-decoration: none; }
.nav-cta {
  background: linear-gradient(135deg, var(--teal), var(--teal-dark));
  color: white !important;
  padding: 9px 20px;
  border-radius: 20px;
  font-weight: 600 !important;
}
.nav-cta:hover { opacity: 0.9; }

/* ── Hero ─────────────────────────────────────────────── */
.hero {
  padding: 100px 0 80px;
  text-align: center;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 28px;
}
.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 22px;
}
.hero p {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 40px;
}
.hero-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, opacity 0.15s;
  text-decoration: none;
}
.btn:hover { transform: translateY(-2px); opacity: 0.92; text-decoration: none; }
.btn-primary {
  background: linear-gradient(135deg, var(--teal), var(--teal-dark));
  color: white;
}
.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1.5px solid var(--border);
}

/* ── Phone mockups ────────────────────────────────────── */
.mockup-row {
  display: flex;
  gap: 20px;
  justify-content: center;
  align-items: flex-end;
  padding: 60px 0 20px;
  overflow-x: auto;
  flex-wrap: wrap;
}
.phone {
  width: 220px;
  flex-shrink: 0;
  background: var(--text);
  border-radius: 44px;
  padding: 14px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.22);
  transform: scale(0.95);
  transition: transform 0.3s;
}
.phone:hover { transform: scale(1.0); }
.phone-screen {
  background: var(--bg);
  border-radius: 32px;
  overflow: hidden;
  min-height: 390px;
  display: flex;
  flex-direction: column;
}
.phone-notch {
  height: 28px;
  background: var(--text);
  border-radius: 0 0 18px 18px;
  width: 100px;
  margin: 0 auto;
}
.phone-nav {
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  border-bottom: 1px solid var(--border);
  gap: 6px;
}
.phone-nav-logo {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.7rem;
  font-weight: 700;
}
.mock-section-title {
  padding: 10px 14px 6px;
  font-size: 0.85rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--teal), var(--teal-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.mock-content { padding: 0 10px; flex: 1; }
.mock-card {
  background: white;
  border-radius: 12px;
  padding: 10px 12px;
  margin-bottom: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.mock-card-label {
  font-size: 0.55rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 3px;
}
.mock-card-value {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
}
.mock-card-row {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
}
.mock-card-half {
  flex: 1;
  background: white;
  border-radius: 10px;
  padding: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.mock-pill {
  display: inline-block;
  background: linear-gradient(135deg, var(--teal), var(--teal-dark));
  color: white;
  font-size: 0.5rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  margin-bottom: 4px;
}
.mock-bar-bg {
  background: var(--border);
  height: 6px;
  border-radius: 3px;
  margin-top: 4px;
  overflow: hidden;
}
.mock-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--teal), var(--teal-dark));
}
.phone-tab-bar {
  display: flex;
  justify-content: space-around;
  padding: 8px 4px;
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.95);
}
.phone-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  font-size: 0.4rem;
  color: var(--text-muted);
}
.phone-tab.active { color: var(--teal); }
.phone-tab svg { width: 14px; height: 14px; }

/* ── Kidney SVG ───────────────────────────────────────── */
.kidney-icon svg { display: block; }

/* ── Features ─────────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.feature-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.10);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(46,183,179,0.12), rgba(26,140,135,0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.4rem;
}
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.coming-soon-badge {
  display: inline-block;
  background: rgba(46,183,179,0.1);
  color: var(--teal-dark);
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 8px;
  margin-top: 8px;
}

/* ── Privacy strip ────────────────────────────────────── */
.privacy-strip {
  background: linear-gradient(135deg, var(--teal), var(--teal-dark));
  color: white;
  padding: 60px 0;
  text-align: center;
}
.privacy-strip h2 { font-size: 1.8rem; font-weight: 700; margin-bottom: 12px; }
.privacy-strip p { font-size: 1rem; opacity: 0.88; max-width: 500px; margin: 0 auto; }
.privacy-icons {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.privacy-icon-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  opacity: 0.9;
}
.privacy-icon-item span:first-child { font-size: 2rem; }

/* ── About ────────────────────────────────────────────── */
.about-section {
  background: var(--surface);
  padding: 80px 0;
}
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-inner blockquote {
  font-size: 1.25rem;
  font-style: italic;
  color: var(--text-muted);
  border-left: 4px solid var(--teal);
  padding-left: 20px;
  margin: 24px 0;
  line-height: 1.7;
}
.about-inner p { color: var(--text-muted); margin-bottom: 16px; line-height: 1.75; }
.about-card {
  background: linear-gradient(145deg, rgba(46,183,179,0.06), rgba(26,140,135,0.10));
  border: 1.5px solid rgba(46,183,179,0.2);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
}
.about-card .big-icon { font-size: 3.5rem; margin-bottom: 16px; }
.about-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.about-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }

/* ── Footer ───────────────────────────────────────────── */
footer {
  background: var(--text);
  color: rgba(255,255,255,0.6);
  padding: 48px 0 32px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.footer-brand p { font-size: 0.88rem; margin-top: 10px; max-width: 260px; }
.footer-links h4 {
  color: white;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.footer-links ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-links a { color: rgba(255,255,255,0.6); font-size: 0.88rem; }
.footer-links a:hover { color: var(--teal); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--teal); }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .about-inner { grid-template-columns: 1fr; }
  .mockup-row { gap: 12px; }
  .phone { width: 180px; }
  .privacy-icons { gap: 24px; }
  .footer-inner { flex-direction: column; }
  .footer-bottom { flex-direction: column; text-align: center; }
}