:root {
  --color-bg: #ffffff;
  --color-bg-alt: #fafafa;
  --color-rose: #b86b85;
  --color-rose-light: #e9c2c5;
  --color-text: #2c2c2c;
  --color-text-muted: #6b6b6b;
  --color-border: #e5e5e5;

  --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.04);

  --radius-card: 16px;
  --radius-pill: 999px;

  --font-heading: Georgia, "Times New Roman", serif;
  --font-body: "Avenir Next", -apple-system, system-ui, -system-ui, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.7;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 110px 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

.section-header {
  max-width: 640px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin: 0 0 16px;
  color: var(--color-text);
}

.section-subtitle {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 16px;
  line-height: 1.7;
}

.card {
  border-radius: var(--radius-card);
  background-color: #ffffff;
  border: 1px solid rgba(229, 229, 229, 0.6);
}

.card-elevated {
  box-shadow: var(--shadow-soft);
  border-color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 25px;
  padding: 14px 32px;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease,
    color 0.18s ease, border-color 0.18s ease;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-rose);
  color: #ffffff;
  box-shadow: 0 8px 18px rgba(184, 107, 133, 0.26);
}

.btn-primary:hover {
  background-color: #a35f77;
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(184, 107, 133, 0.28);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--color-rose);
  border: 1px solid var(--color-rose);
}

.btn-secondary:hover {
  background-color: #fff8fa;
  transform: translateY(-1px);
}

.btn-text {
  background: transparent;
  color: var(--color-text-muted);
  padding-inline: 8px;
  padding-block: 2px;
  border-radius: 0;
  border: none;
  box-shadow: none;
}

.btn-text:hover {
  color: var(--color-rose);
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(229, 229, 229, 0.6);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--color-text);
}

.logo-image {
  height: 28px;
  display: block;
}

.nav {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-link {
  font-size: 14px;
  color: var(--color-text-muted);
  position: relative;
  padding-bottom: 3px;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-rose);
  transition: width 0.18s ease;
}

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

.nav-link:hover::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  gap: 8px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(229, 229, 229, 0.9);
  background-color: #ffffff;
  padding: 0;
  cursor: pointer;
}

.nav-toggle-line {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  display: block;
}

.nav-toggle-line + .nav-toggle-line {
  margin-top: 4px;
}

/* Hero */

.hero {
  padding-top: 120px;
  padding-bottom: 120px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 80px;
  align-items: center;
}

.hero-copy {
  max-width: 600px;
}

.hero-tagline {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-text-muted);
  margin: 0 0 18px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 40px;
  line-height: 1.18;
  margin: 0 0 18px;
  letter-spacing: 0.01em;
}

.hero-subtitle {
  margin: 0 0 28px;
  font-size: 17px;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 16px;
}

.hero-footnote {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

.hero-visual {
  padding: 28px;
}

.hero-device {
  border-radius: 32px;
  background: linear-gradient(155deg, #ffffff, #faf3f5);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.06);
  padding: 12px;
}

.device-header {
  display: flex;
  justify-content: center;
  padding: 8px 0 10px;
}

.device-pill {
  width: 56px;
  height: 6px;
  border-radius: 999px;
  background-color: #e4e4e4;
}

.device-body {
  background-color: #ffffff;
  border-radius: 28px;
  padding: 20px 18px 22px;
}

.device-calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.device-month {
  font-size: 14px;
  font-weight: 600;
}

.device-phase-pill {
  font-size: 12px;
  border-radius: 999px;
  padding: 4px 10px;
  background-color: var(--color-rose-light);
  color: var(--color-rose);
}

.device-calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  margin-bottom: 18px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  margin-inline: auto;
}

.dot-muted {
  background-color: #f1f1f1;
}

.dot-active {
  background: radial-gradient(circle at 30% 20%, #f7dbe0, var(--color-rose));
}

.device-insight-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
  margin: 0 0 4px;
}

.device-insight-text {
  margin: 0;
  font-size: 13px;
  color: var(--color-text);
}

/* Problem */

.problem-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}

.problem-copy p {
  margin-top: 0;
  margin-bottom: 18px;
  color: var(--color-text-muted);
  font-size: 16px;
}

.problem-visual {
  padding: 28px 26px;
}

.cycle-diagram {
  text-align: center;
}

.cycle-ring {
  position: relative;
  width: 260px;
  height: 260px;
  margin: 0 auto 22px;
  border-radius: 999px;
  background: conic-gradient(
    from 270deg,
    #fbe6ea 0deg 90deg,
    #fdf4f5 90deg 180deg,
    #f7dbe0 180deg 270deg,
    #fdf4f5 270deg 360deg
  );
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.04);
}

.cycle-phase {
  position: absolute;
  font-size: 12px;
  color: var(--color-text-muted);
}

.phase-menstrual {
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
}

.phase-follicular {
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
}

.phase-ovulatory {
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
}

.phase-luteal {
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
}

.cycle-caption {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* Features */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
}

.feature-card {
  padding: 24px 22px 26px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease,
    background-color 0.18s ease;
}

.feature-icon {
  font-size: 22px;
  margin-bottom: 18px;
}

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  margin: 0 0 12px;
}

.feature-card p {
  margin: 0 0 16px;
  font-size: 14px;
  color: var(--color-text-muted);
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 13px;
  color: var(--color-text);
}

.feature-list li + li {
  margin-top: 6px;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(184, 107, 133, 0.16);
  border-color: rgba(184, 107, 133, 0.25);
  background: radial-gradient(circle at top left, #fff7fa, #ffffff);
}

/* How it works */

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
}

.step {
  padding: 4px 2px;
}

.step-number {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.step h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  margin: 0 0 10px;
}

.step p {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

/* Benefits */

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 20px;
}

.benefit {
  padding: 18px 18px 20px;
}

.benefit h3 {
  font-family: var(--font-heading);
  font-size: 16px;
  margin: 0 0 8px;
}

.benefit p {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

/* Phases */

.phases-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 26px;
}

.phase-card {
  padding: 22px 20px 22px;
}

.phase-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  margin: 0 0 10px;
}

.phase-range {
  font-size: 13px;
  font-weight: normal;
  color: var(--color-text-muted);
}

.phase-description {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--color-text-muted);
}

.phase-label {
  margin: 10px 0 4px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
}

.phase-skin,
.phase-focus {
  margin: 0;
  font-size: 14px;
  color: var(--color-text);
}

/* Testimonials */

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}

.testimonial {
  padding: 22px 22px 20px;
}

.testimonial-quote {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--color-text);
}

.testimonial-author {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* Science / Education */

.education-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.education-card {
  padding: 22px 20px 22px;
}

.education-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  margin: 0 0 10px;
}

.education-card p {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--color-text-muted);
}

.education-label {
  margin: 4px 0 0;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
}

/* CTA */

.section-cta {
  background: radial-gradient(circle at top left, #fdf4f5, #ffffff);
  border-top: 1px solid rgba(229, 229, 229, 0.6);
  border-bottom: 1px solid rgba(229, 229, 229, 0.6);
}

.cta-inner {
  text-align: center;
}

.cta-copy h2 {
  font-family: var(--font-heading);
  font-size: 26px;
  margin: 0 0 16px;
}

.cta-footnote {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

.waitlist-form {
  margin-top: 24px;
  max-width: 560px;
  margin-inline: auto;
  text-align: left;
}

.waitlist-fields {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 14px;
}

.waitlist-input {
  flex: 1;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  padding: 12px 16px;
  font-size: 14px;
  font-family: var(--font-body);
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.waitlist-input:focus-visible {
  border-color: var(--color-rose);
  box-shadow: 0 0 0 1px rgba(184, 107, 133, 0.4);
  background-color: #fff8fb;
}

.waitlist-extra {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.waitlist-select-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
}

.waitlist-select {
  border-radius: 999px;
  border: 1px solid var(--color-border);
  padding: 9px 14px;
  font-size: 13px;
  font-family: var(--font-body);
  background-color: #ffffff;
}

.waitlist-success {
  margin-top: 14px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* FAQ */

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background-color: #ffffff;
  padding: 14px 18px;
}

.faq-item + .faq-item {
  margin-top: 10px;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  margin: 10px 0 4px;
  font-size: 14px;
  color: var(--color-text-muted);
}

/* Footer */

.site-footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid rgba(229, 229, 229, 0.7);
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 60px;
  padding: 40px 24px 30px;
}

.footer-brand {
  max-width: 320px;
}

.footer-tagline {
  margin: 12px 0 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 40px;
}

.footer-column h4 {
  margin: 0 0 10px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text);
}

.footer-link {
  display: block;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.footer-link:hover {
  color: var(--color-rose);
}

.footer-bottom {
  border-top: 1px solid rgba(229, 229, 229, 0.8);
  padding: 12px 0;
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.footer-meta {
  margin: 0;
  font-size: 12px;
  color: var(--color-text-muted);
}

.footer-meta-links {
  display: flex;
  gap: 18px;
}

.footer-meta-links .footer-link {
  font-size: 12px;
}

/* Scroll animations */

.has-js [data-animate] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.35s ease-out, transform 0.35s ease-out;
}

.has-js [data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 40px;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .phases-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .benefits-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .testimonials-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .education-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .site-header {
    position: static;
  }

  .header-inner {
    padding-inline: 16px;
    gap: 12px;
  }

  .nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 60px;
    background-color: #ffffff;
    border-radius: 18px;
    padding: 16px 18px;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.08);
    flex-direction: column;
    gap: 10px;
    display: none;
  }

  .nav.is-open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-cta {
    display: none;
  }

  .hero {
    padding-top: 72px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-visual {
    order: -1;
  }

  .section {
    padding: 80px 0;
  }

  .problem-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .feature-grid,
  .steps-grid,
  .benefits-grid,
  .phases-grid,
  .testimonials-grid,
  .education-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner {
    flex-direction: column;
  }

  .footer-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 520px) {
  .footer-columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-title {
    font-size: 32px;
  }

  .section-header h2 {
    font-size: 24px;
  }
}