@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,300;9..144,500;9..144,600&family=Sora:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

  html {
    scroll-behavior: smooth;
  }

  :root {
    --night: #14172E;
    --night-deep: #0D0F22;
    --card: #1D2140;
    --card-hi: #262B52;
    --moon: #F5D97A;
    --moon-dim: #A98F4E;
    --lavender: #B7A9E0;
    --ink: #EFEDF7;
    --ink-dim: #8A8FB9;
    --hairline: rgba(183, 169, 224, 0.15);
    --bg-glow: #232858;
    --star-opacity: 0.5;
    --header-bg: rgba(20, 23, 46, 0.7);
  }

  html[data-theme="day"] {
    --night: #FAF6ED;
    --night-deep: #F1EADA;
    --card: #FFFFFF;
    --card-hi: #FFF6E0;
    --moon: #C99A3B;
    --moon-dim: #A9812F;
    --lavender: #6C5FA8;
    --ink: #211D33;
    --ink-dim: #6C6A85;
    --hairline: rgba(33, 29, 51, 0.12);
    --bg-glow: #FBE4C4;
    --star-opacity: 0;
    --header-bg: rgba(250, 246, 237, 0.78);
  }

  * { box-sizing: border-box; }

  body {
    margin: 0;
    background: radial-gradient(ellipse 120% 80% at 50% -10%, var(--bg-glow) 0%, var(--night) 45%, var(--night-deep) 100%);
    color: var(--ink);
    font-family: 'Sora', sans-serif;
    min-height: 100vh;
    padding: 0;
    transition: background 0.35s ease, color 0.35s ease;
  }

  .wrap {
    max-width: 640px;
    margin: 0 auto;
    padding: 40px 20px 0;
  }

  /* Site header */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: var(--header-bg);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    border-bottom: 1px solid var(--hairline);
  }

  .site-header-inner {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 11px;
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 17px;
    color: var(--ink);
    text-decoration: none;
  }

  .logo-mark {
    width: 28px;
    height: 28px;
    border-radius: 9px;
    background: var(--night-deep);
    border: 1px solid var(--hairline);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 0 0 1px rgba(245, 217, 122, 0.08), 0 2px 14px rgba(245, 217, 122, 0.22);
  }

  .logo-mark svg, .logo-mark img {
    width: 15px;
    height: 15px;
    display: block;
  }

  .site-nav {
    display: flex;
    align-items: center;
    gap: 4px;
  }

  .site-nav a {
    color: var(--ink-dim);
    text-decoration: none;
    font-size: 13.5px;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 100px;
    transition: color 0.2s ease, background 0.2s ease;
  }

  .site-nav a:hover, .site-nav a:focus-visible { color: var(--ink); background: var(--card-hi); }

  @media (max-width: 520px) {
    .site-nav a { font-size: 12.5px; padding: 8px 12px; }
  }

  /* Content sections */
  .content-section {
    max-width: 640px;
    margin: 38px auto 0;
    padding: 0 20px;
    position: relative;
    z-index: 1;
    scroll-margin-top: 88px;
  }

  .content-section h2 {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 26px;
    margin: 0 0 28px;
    text-align: center;
  }

  .steps {
    display: grid;
    gap: 14px;
  }

  .step {
    display: flex;
    gap: 16px;
    background: var(--card);
    border: 1px solid var(--hairline);
    border-radius: 16px;
    padding: 20px 22px;
  }

  .step-num {
    font-family: 'JetBrains Mono', monospace;
    color: var(--moon-dim);
    font-size: 13px;
    flex-shrink: 0;
    padding-top: 2px;
  }

  .step-body h3 {
    font-family: 'Sora', sans-serif;
    font-size: 15px;
    font-weight: 600;
    margin: 0 0 6px;
  }

  .step-body p {
    color: var(--ink-dim);
    font-size: 13.5px;
    line-height: 1.6;
    margin: 0;
  }

  .info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

  @media (max-width: 520px) {
    .info-grid { grid-template-columns: 1fr; }
  }

  .info-card {
    background: var(--card);
    border: 1px solid var(--hairline);
    border-radius: 16px;
    padding: 22px;
  }

  .info-card .stat {
    font-family: 'Fraunces', serif;
    font-size: 30px;
    color: var(--moon);
    margin-bottom: 6px;
  }

  .info-card p {
    color: var(--ink-dim);
    font-size: 13.5px;
    line-height: 1.6;
    margin: 0;
  }

  .age-table {
    background: var(--card);
    border: 1px solid var(--hairline);
    border-radius: 16px;
    overflow: hidden;
  }

  .age-row {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr;
    gap: 8px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--hairline);
    font-size: 13.5px;
  }

  .age-row:last-child { border-bottom: none; }

  .age-row span:first-child { color: var(--ink); }
  .age-row span:nth-child(2), .age-row span:nth-child(3) { color: var(--ink-dim); font-family: 'JetBrains Mono', monospace; font-size: 12.5px; }

  .age-row-head {
    background: var(--card-hi);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--moon-dim);
  }

  .age-row-head span:first-child { color: var(--moon-dim); }
  .age-row-head span:nth-child(2), .age-row-head span:nth-child(3) { color: var(--moon-dim); font-family: 'JetBrains Mono', monospace; }

  .age-source {
    color: var(--ink-dim);
    font-size: 12.5px;
    line-height: 1.6;
    margin: 16px 4px 0;
  }

  @media (max-width: 480px) {
    .age-row { grid-template-columns: 1.4fr 0.9fr 0.9fr; padding: 12px 14px; font-size: 12px; }
  }

  .faq-item {
    border-bottom: 1px solid var(--hairline);
  }

  .faq-item:first-child { border-top: 1px solid var(--hairline); }

  .faq-q {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--ink);
    font-family: 'Sora', sans-serif;
    font-size: 15px;
    font-weight: 500;
    text-align: left;
    padding: 18px 4px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
  }

  .faq-q:focus-visible { outline: 2px solid var(--lavender); outline-offset: 2px; }

  .faq-icon {
    color: var(--moon-dim);
    font-family: 'JetBrains Mono', monospace;
    font-size: 16px;
    transition: transform 0.25s ease;
    flex-shrink: 0;
  }

  .faq-item.open .faq-icon { transform: rotate(45deg); }

  .faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .faq-a p {
    color: var(--ink-dim);
    font-size: 13.5px;
    line-height: 1.6;
    margin: 0 0 18px;
    padding: 0 4px;
  }

  /* Site footer */
  .site-footer-wrap {
    max-width: 900px;
    margin: 35px auto 0;
    padding: 56px 20px 32px;
    border-top: 1px solid var(--hairline);
    position: relative;
    z-index: 1;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 44px;
  }

  .footer-brand .logo { font-size: 15px; margin-bottom: 12px; }
  .footer-brand .logo .logo-mark { width: 22px; height: 22px; }
  .footer-brand .logo .logo-mark svg, .footer-brand .logo .logo-mark img { width: 12px; height: 12px; }

  .footer-copyright-line {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 15px;
    color: var(--ink);
    margin: 0 0 12px;
  }

  .footer-copyright-line a {
    color: var(--ink);
    text-decoration: none;
  }

  .footer-copyright-line a:hover { color: var(--moon); }

  .footer-tagline {
    color: var(--ink-dim);
    font-size: 13px;
    line-height: 1.7;
    margin: 0;
    max-width: 240px;
  }

  .footer-heading {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--moon-dim);
    margin: 0 0 16px;
  }

  .footer-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .footer-col a {
    color: var(--ink-dim);
    text-decoration: none;
    font-size: 13.5px;
    width: fit-content;
  }

  .footer-col a:hover { color: var(--moon); }

  .footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--hairline);
    text-align: center;
  }

  .footer-copyright {
    color: var(--ink-dim);
    font-size: 12.5px;
    margin: 0;
  }

  @media (max-width: 720px) {
    .footer-grid { grid-template-columns: 1fr 1fr; row-gap: 32px; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-tagline { max-width: none; }
  }

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

  /* Starfield */
  .stars {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    pointer-events: none;
    z-index: 0;
    opacity: var(--star-opacity);
    transition: opacity 0.35s ease;
  }

  .header-controls {
    display: flex;
    align-items: center;
    gap: 14px;
    padding-left: 14px;
    margin-left: 4px;
    border-left: 1px solid var(--hairline);
  }

  @media (max-width: 640px) {
    .header-controls { border-left: none; padding-left: 0; margin-left: 0; }
  }

  .theme-toggle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--hairline);
    background: var(--card);
    color: var(--moon);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    transition: border-color 0.2s ease, transform 0.2s ease;
  }

  .theme-toggle:hover { border-color: var(--moon); transform: translateY(-1px); }
  .theme-toggle:focus-visible { outline: 2px solid var(--lavender); outline-offset: 2px; }
  .theme-toggle svg { width: 17px; height: 17px; }

  .menu-toggle {
    display: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--hairline);
    background: var(--card);
    color: var(--ink);
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
  }

  .menu-toggle:focus-visible { outline: 2px solid var(--lavender); outline-offset: 2px; }
  .menu-toggle svg { width: 17px; height: 17px; }

  @media (max-width: 640px) {
    .site-nav {
      display: none;
      position: absolute;
      top: calc(100% + 8px);
      right: 20px;
      left: 20px;
      background: var(--card);
      border: 1px solid var(--hairline);
      border-radius: 16px;
      padding: 8px;
      flex-direction: column;
      gap: 2px;
    }
    .site-nav.open { display: flex; }
    .site-nav a { padding: 12px 14px; border-radius: 10px; }
    .site-nav a:hover { background: var(--card-hi); }
    .menu-toggle { display: flex; }
  }

  header {
    text-align: center;
    margin-bottom: 5px;
    position: relative;
    z-index: 1;
  }

  .eyebrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--moon-dim);
    margin-bottom: 14px;
  }

  h1 {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: clamp(32px, 6vw, 46px);
    margin: 0 0 10px;
    letter-spacing: -0.01em;
  }

  .hero-tagline {
    font-family: 'Fraunces', serif;
    font-weight: 400;
    font-size: clamp(18px, 3vw, 22px);
    color: var(--ink-dim);
    margin: 0 0 16px;
    letter-spacing: -0.005em;
  }

  .hero-tagline em {
    font-style: italic;
    font-weight: 300;
    color: var(--lavender);
  }

  .sub {
    color: var(--ink-dim);
    font-size: 15px;
    line-height: 1.6;
    max-width: 420px;
    margin: 30px auto 0;
    text-align: center;
  }

  /* Mode toggle */
  .toggle {
    display: flex;
    background: var(--card);
    border: 1px solid var(--hairline);
    border-radius: 100px;
    padding: 4px;
    margin: 32px 0 28px;
    position: relative;
    z-index: 1;
  }

  .toggle button {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--ink-dim);
    font-family: 'Sora', sans-serif;
    font-size: 14px;
    font-weight: 500;
    padding: 12px 16px;
    border-radius: 100px;
    cursor: pointer;
    transition: color 0.25s ease;
    position: relative;
    z-index: 2;
  }

  .toggle button.active {
    color: var(--night-deep);
  }

  .toggle-bg {
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 4px;
    width: calc(50% - 4px);
    background: var(--moon);
    border-radius: 100px;
    transition: transform 0.3s cubic-bezier(0.65, 0, 0.35, 1);
    z-index: 1;
  }

  .toggle-bg.right { transform: translateX(100%); }

  /* Time input card */
  .card {
    background: var(--card);
    border: 1px solid var(--hairline);
    border-radius: 24px;
    padding: 32px;
    position: relative;
    z-index: 1;
  }

  .time-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-bottom: 8px;
  }

  .time-label {
    text-align: center;
    color: var(--ink-dim);
    font-size: 13px;
    margin-bottom: 18px;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.05em;
  }

  select {
    appearance: none;
    background: var(--night-deep);
    border: 1px solid var(--hairline);
    color: var(--ink);
    font-family: 'JetBrains Mono', monospace;
    font-size: 28px;
    font-weight: 500;
    padding: 12px 18px;
    border-radius: 14px;
    cursor: pointer;
    text-align: center;
  }

  select:focus-visible {
    outline: 2px solid var(--moon);
    outline-offset: 2px;
  }

  .colon {
    font-family: 'JetBrains Mono', monospace;
    font-size: 28px;
    color: var(--ink-dim);
  }

  .calc-btn {
    display: block;
    width: 100%;
    margin-top: 24px;
    background: var(--moon);
    color: var(--night-deep);
    border: none;
    border-radius: 14px;
    padding: 16px;
    font-family: 'Sora', sans-serif;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
  }

  .calc-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(245, 217, 122, 0.18); }
  .calc-btn:focus-visible { outline: 2px solid var(--lavender); outline-offset: 3px; }

  .now-btn {
    display: block;
    width: 100%;
    margin-top: 10px;
    background: transparent;
    color: var(--lavender);
    border: none;
    padding: 8px;
    font-family: 'Sora', sans-serif;
    font-weight: 500;
    font-size: 13px;
    cursor: pointer;
    text-align: center;
  }

  .now-btn:hover { color: var(--moon); }
  .now-btn:focus-visible { outline: 2px solid var(--lavender); outline-offset: 3px; }

  /* Results view */
  .results-view {
    padding-top: 12px;
    position: relative;
    z-index: 1;
  }

  .rv-heading {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 32px;
    color: var(--moon);
    text-align: center;
    margin: 0 0 20px;
  }

  .rv-line {
    color: var(--ink);
    font-size: 15px;
    text-align: center;
    line-height: 1.6;
    margin: 0 0 25px;
  }

  .rv-note {
    color: var(--ink);
    font-size: 14px;
    text-align: center;
    line-height: 1.7;
    margin: 28px 0 28px;
  }

  .go-back-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    background: var(--moon);
    color: var(--night-deep);
    border: none;
    border-radius: 14px;
    padding: 16px;
    font-family: 'Sora', sans-serif;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
  }

  .go-back-btn svg { width: 18px; height: 18px; }
  .go-back-btn:hover { opacity: 0.92; }
  .go-back-btn:focus-visible { outline: 2px solid var(--lavender); outline-offset: 3px; }

  .result-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .result-grid.secondary {
    grid-template-columns: repeat(4, 1fr);
    margin-top: 10px;
  }

  @media (max-width: 480px) {
    .result-grid.secondary { grid-template-columns: repeat(2, 1fr); }
  }

  @media (max-width: 560px) {
    .rv-heading { font-size: 26px; margin-bottom: 16px; }
    .rv-line { font-size: 13.5px; margin-bottom: 20px; }
    .rv-note { font-size: 13px; margin: 22px 0 22px; }

    .result-grid {
      grid-template-columns: 1fr;
    }

    .result-card {
      padding: 16px 18px;
    }

    .result-time {
      font-size: 22px;
    }

    .result-card.plain {
      padding: 14px 8px;
    }

    .result-card.plain .result-time {
      font-size: 16px;
    }

    .result-badge {
      font-size: 10px;
    }
  }

  @media (max-width: 360px) {
    .result-grid.secondary { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .result-card.plain .result-time { font-size: 14.5px; }
  }

  .result-card {
    background: var(--card-hi);
    border: 1px solid var(--hairline);
    border-radius: 16px;
    padding: 20px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    opacity: 0;
    transform: translateY(8px);
    animation: rise 0.5s ease forwards;
  }

  .result-card.plain {
    background: var(--card);
    justify-content: center;
    padding: 16px 12px;
  }

  @keyframes rise {
    to { opacity: 1; transform: translateY(0); }
  }

  .result-time {
    font-family: 'Sora', sans-serif;
    font-weight: 600;
    font-size: 26px;
    color: var(--ink);
    white-space: nowrap;
  }

  .result-card.plain .result-time {
    font-size: 19px;
  }

  .result-badge {
    font-family: 'Sora', sans-serif;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--moon);
    white-space: nowrap;
  }

  .footnote {
    max-width: 640px;
    margin: 28px auto 0;
    padding: 0 20px;
    text-align: center;
    color: var(--ink-dim);
    font-size: 12px;
    line-height: 1.7;
    position: relative;
    z-index: 1;
  }

  @media (prefers-reduced-motion: reduce) {
    .result-card { animation: none; opacity: 1; transform: none; }
    .calc-btn:hover { transform: none; }
    html { scroll-behavior: auto; }
  }

  /* Nav dropdown (More menu) */
  .nav-dropdown { position: relative; }

  .dropdown-toggle {
    background: none;
    border: none;
    color: var(--ink-dim);
    font-family: 'Sora', sans-serif;
    font-size: 13.5px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0;
  }

  .dropdown-toggle:hover, .dropdown-toggle:focus-visible { color: var(--moon); }
  .dropdown-toggle svg { width: 11px; height: 11px; transition: transform 0.2s ease; }
  .nav-dropdown.open .dropdown-toggle svg { transform: rotate(180deg); }

  .dropdown-menu {
    display: none;
    flex-direction: column;
    gap: 2px;
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    min-width: 190px;
    background: var(--card);
    border: 1px solid var(--hairline);
    border-radius: 14px;
    padding: 8px;
    z-index: 5;
  }

  .nav-dropdown.open .dropdown-menu { display: flex; }

  .dropdown-menu a {
    padding: 10px 12px;
    border-radius: 10px;
    color: var(--ink-dim);
    text-decoration: none;
    font-size: 13px;
  }

  .dropdown-menu a:hover { background: var(--card-hi); color: var(--ink); }

  @media (max-width: 640px) {
    .nav-dropdown { width: 100%; }
    .dropdown-toggle {
      width: 100%;
      padding: 12px 14px;
      border-radius: 10px;
      justify-content: space-between;
      color: var(--ink);
    }
    .dropdown-toggle:hover { background: var(--card-hi); }
    .dropdown-menu {
      position: static;
      border: none;
      background: transparent;
      padding: 0 0 4px 10px;
    }
  }

  /* Simple content pages (About, Contact, Privacy, Disclaimer, Terms) */
  .page-content {
    max-width: 640px;
    margin: 0 auto;
    padding: 8px 20px 40px;
    position: relative;
    z-index: 1;
  }

  .page-content .eyebrow { text-align: left; margin-bottom: 10px; }

  .page-content h1 {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: clamp(28px, 5vw, 38px);
    margin: 0 0 8px;
    text-align: left;
  }

  .page-updated {
    color: var(--ink-dim);
    font-size: 12.5px;
    margin: 0 0 36px;
  }

  .page-content h2 {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 19px;
    margin: 32px 0 10px;
  }

  .page-content h2:first-of-type { margin-top: 0; }

  .page-content p {
    color: var(--ink-dim);
    font-size: 14.5px;
    line-height: 1.75;
    margin: 0 0 14px;
  }

  .page-content ul {
    margin: 0 0 14px;
    padding-left: 20px;
  }

  .page-content li {
    color: var(--ink-dim);
    font-size: 14.5px;
    line-height: 1.75;
    margin-bottom: 6px;
  }

  .page-content a { color: var(--lavender); }
  .page-content strong { color: var(--ink); font-weight: 600; }

  .contact-card {
    background: var(--card);
    border: 1px solid var(--hairline);
    border-radius: 16px;
    padding: 24px;
    margin-top: 10px;
    margin-bottom: 20px
  }

  .contact-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
  }

  .contact-row:not(:last-child) { border-bottom: 1px solid var(--hairline); }

  .contact-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--moon-dim);
    min-width: 70px;
  }

  .contact-value { color: var(--ink); font-size: 14.5px; }
  .contact-value a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--hairline); }