/* WaterLog marketing site — brand tokens mirror the web app's
   web/src/presentation/styles/tokens.css ("Direction B"). */
:root {
  color-scheme: light dark;
  --bg: #f7f6f3;
  --card: #ffffff;
  --ink-0: #111111;
  --ink-1: #52524d;
  --ink-2: #6e6e68;
  --hair: #ebe9e2;
  --pri: #2c5fe6;
  --pri-l: #e9efff;
  --pri-d: #1d3eaa;
  --navy: #0f1f4d;
  --navy-ink: #c9d2f0;
  --grn: #117a4e;
  --grn-l: #e3f3ea;
  --amb: #9e5500;
  --amb-l: #fbecd6;
  --red: #b53129;
  --red-l: #fae3e0;
  --shadow: 0 1px 0 rgba(20, 20, 20, 0.02), 0 1px 2px rgba(20, 20, 20, 0.04);
  --shadow-lg: 0 18px 50px -18px rgba(15, 31, 77, 0.28);
  --sans: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  --mono: 'DM Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121418;
    --card: #1b1e24;
    --ink-0: #f3f3f1;
    --ink-1: #c4c4bd;
    --ink-2: #9c9c95;
    --hair: #2c3038;
    --pri: #7aa2ff;
    --pri-l: rgba(122, 162, 255, 0.14);
    --grn: #5fd09a;
    --grn-l: rgba(95, 208, 154, 0.14);
    --amb: #f0b35c;
    --amb-l: rgba(240, 179, 92, 0.14);
    --red: #ff8a80;
    --red-l: rgba(255, 138, 128, 0.14);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 18px 50px -18px rgba(0, 0, 0, 0.7);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-0);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
}
a { color: var(--pri); text-underline-offset: 2px; }
h1, h2, h3 { margin: 0; line-height: 1.15; }
p { margin: 0 0 1rem; }
.wrap { max-width: 72rem; margin: 0 auto; padding: 0 1.25rem; }
.mono { font-family: var(--mono); }

/* --- Nav --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--hair);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; height: 64px; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--ink-0);
  text-decoration: none;
}
.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: linear-gradient(135deg, #2c5fe6, #8ab0ff);
}
.nav-links { display: flex; align-items: center; gap: 1.5rem; font-size: 0.95rem; }
.nav-links a:not(.btn) { color: var(--ink-1); text-decoration: none; }
.nav-links a:not(.btn):hover { color: var(--ink-0); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 1.2rem;
  border-radius: 10px;
  font-weight: 500;
  font-size: 0.97rem;
  text-decoration: none;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}
.btn-primary { background: #2c5fe6; color: #fff; }
.btn-primary:hover { background: #1d3eaa; }
.btn-ghost { border: 1px solid var(--hair); background: var(--card); color: var(--ink-0); }
.btn-ghost:hover { border-color: var(--ink-2); }
.nav .btn { min-height: 38px; padding: 0 0.95rem; font-size: 0.92rem; }
.btn-light { background: #fff; color: var(--navy); }
.btn-light:hover { background: #e9efff; }

/* --- Hero --- */
.hero { padding: 5rem 0 4.5rem; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 3.5rem; align-items: center; }
.kicker {
  margin: 0 0 0.9rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pri);
}
h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2.6rem, 5.4vw, 4.1rem);
  line-height: 1.04;
  letter-spacing: -0.015em;
  margin-bottom: 1.4rem;
}
h1 em { color: var(--ink-1); }
.lede { font-size: 1.14rem; color: var(--ink-1); max-width: 34rem; margin-bottom: 2rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* --- Illustrative visit card (fictional data) --- */
.visit-card {
  margin: 0;
  padding: 1.35rem;
  background: var(--card);
  border: 1px solid var(--hair);
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
}
.vc-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: 1rem; }
.vc-title { font-weight: 600; font-size: 1.05rem; }
.vc-sub { font-size: 0.85rem; color: var(--ink-2); }
.vc-rows { list-style: none; margin: 0; padding: 0; }
.vc-rows li {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 0.8rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--hair);
  font-size: 0.95rem;
}
.vc-rows .mono { color: var(--ink-1); font-size: 0.9rem; }
.vc-foot { margin-top: 0.9rem; padding-top: 0.9rem; border-top: 1px solid var(--hair); font-size: 0.82rem; color: var(--ink-2); }
.chip {
  display: inline-block;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
}
.chip-grn { background: var(--grn-l); color: var(--grn); }
.chip-amb { background: var(--amb-l); color: var(--amb); }
.chip-red { background: var(--red-l); color: var(--red); }
.chip-pri { background: var(--pri-l); color: var(--pri); }

/* --- Sections --- */
.section { padding: 5rem 0; }
.section-alt { background: var(--card); border-top: 1px solid var(--hair); border-bottom: 1px solid var(--hair); }
h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2rem, 3.8vw, 2.8rem);
  letter-spacing: -0.01em;
  margin-bottom: 2.5rem;
  max-width: 40rem;
}
h3 { font-size: 1.08rem; font-weight: 600; margin-bottom: 0.45rem; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }
.card {
  padding: 1.5rem;
  background: var(--card);
  border: 1px solid var(--hair);
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.card p { color: var(--ink-1); font-size: 0.96rem; margin: 0; }
.icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 1rem;
  border-radius: 10px;
  background: var(--pri-l);
}
.icon svg { width: 21px; height: 21px; fill: none; stroke: var(--pri); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.note { margin: 2rem 0 0; color: var(--ink-1); }

.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.steps p { color: var(--ink-1); margin: 0; }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 1rem;
  border-radius: 50%;
  background: #2c5fe6;
  color: #fff;
  font-family: var(--mono);
  font-weight: 500;
}

/* --- FAQ --- */
.faq { max-width: 46rem; }
.faq h2 { margin-bottom: 1.5rem; }
.faq details { border-bottom: 1px solid var(--hair); padding: 1rem 0; }
.faq details:first-of-type { border-top: 1px solid var(--hair); }
.faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-weight: 600;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; color: var(--ink-2); }
.faq details[open] summary::after { content: '\2212'; }
.faq details p { margin: 0.75rem 0 0; color: var(--ink-1); }

/* --- Support page --- */
.support-hero { padding: 5rem 0 4.5rem; }
.support-hero .lede { max-width: 38rem; }
.support-contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: start; }
.support-contact-grid h2 { margin-bottom: 1rem; }
.support-intro { max-width: 27rem; color: var(--ink-1); }
.support-email { display: inline-block; margin-top: 0.35rem; font-size: 1.08rem; font-weight: 600; overflow-wrap: anywhere; }
.support-contact-card { padding: 2rem; }
.support-contact-card h3 { margin-bottom: 1rem; }
.support-contact-card ul { margin: 0; padding-left: 1.3rem; color: var(--ink-1); }
.support-contact-card li { padding-left: 0.25rem; margin: 0.65rem 0; }
.support-private-note { margin: 1.5rem 0 0; padding-top: 1rem; border-top: 1px solid var(--hair); color: var(--ink-1); font-size: 0.94rem; }
.support-faq details > div { padding: 0.2rem 0 0.45rem; color: var(--ink-1); }
.support-faq details ul { margin: 0.75rem 0; padding-left: 1.4rem; }
.support-faq details li { margin: 0.4rem 0; }
.support-faq details p + p { margin-top: 0.75rem; }
.support-faq details a { color: var(--pri); }

/* --- CTA band + footer --- */
.cta-band {
  padding: 4.5rem 0;
  text-align: center;
  color: #fff;
  background: linear-gradient(135deg, #0f1f4d, #1d3eaa);
}
.cta-band h2 { margin: 0 auto 0.9rem; color: #fff; }
.cta-band p { color: #c9d2f0; margin-bottom: 1.8rem; }

.footer { padding: 3rem 0; background: #0f1f4d; color: #c9d2f0; font-size: 0.92rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; }
.footer p { margin: 0.9rem 0 0; }
.brand-light { color: #fff; }
.footer-links { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-links a { color: #c9d2f0; text-decoration: none; }
.footer-links a:hover { color: #fff; text-decoration: underline; }

/* --- Responsive --- */
@media (max-width: 900px) {
  .hero { padding: 3rem 0; }
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; gap: 1.75rem; }
  .support-contact-grid { grid-template-columns: 1fr; gap: 2rem; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .wrap { padding: 0 1rem; }
  .nav-links { gap: 1rem; }
  .nav-links a[href="#features"], .nav-links a[href="#how"] { display: none; }
  .grid { grid-template-columns: 1fr; }
  .section { padding: 3.5rem 0; }
  .vc-rows li { grid-template-columns: 1fr auto; }
  .vc-rows li .chip { grid-column: 2; justify-self: end; }
  .support-hero { padding: 3.5rem 0; }
  .support-contact-card { padding: 1.5rem; }
  .support-email { font-size: 1rem; }
  .nav-links a[href="#questions"], .nav-links a[href="#contact"] { display: none; }
}