/* AquaFlow — mobile-first. Base = phone; enhancements via min-width.
   System fonts only (Google Ads: no extra third-party assets). */
:root {
  --color-primary: #1E40AF;
  --color-primary-hover: #1D4ED8;
  --color-on-primary: #FFFFFF;
  --color-secondary: #3B82F6;
  --color-accent: #EA580C;
  --color-accent-hover: #C2410C;
  --color-on-accent: #FFFFFF;
  --color-background: #F4F8FF;
  --color-foreground: #0F2A6B;
  --color-card: #FFFFFF;
  --color-muted: #EEF3FB;
  --color-muted-fg: #475569;
  --color-border: #D3E2FB;
  --color-border-strong: #BFDBFE;
  --color-destructive: #DC2626;
  --color-ring: #1E40AF;
  --radius-sm: 10px;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-card: 0 1px 2px rgba(15, 42, 107, 0.04), 0 12px 32px rgba(15, 42, 107, 0.08);
  --font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  --ease: 180ms ease;
  --gutter: 1rem;
  --tap: 48px;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-foreground);
  background:
    radial-gradient(120% 60% at 100% 0%, rgba(59, 130, 246, 0.14), transparent 60%),
    var(--color-background);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--color-primary); transition: color var(--ease); }
button, .btn, .preset, .type-option, summary, label.checkbox, .header-phone { cursor: pointer; }
button, input, a { -webkit-tap-highlight-color: transparent; }

h1, h2, h3 {
  margin: 0 0 0.5rem;
  line-height: 1.15;
  color: var(--color-foreground);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
h1 { font-size: 1.6rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.05rem; }
p { margin: 0 0 0.75rem; }
.muted { color: var(--color-muted-fg); }
.small { font-size: 0.875rem; }
.center { text-align: center; }
.lead { font-size: 1rem; color: var(--color-muted-fg); max-width: 34rem; }

.container { width: calc(100% - 2 * var(--gutter)); max-width: 1120px; margin: 0 auto; }
.narrow { width: calc(100% - 2 * var(--gutter)); max-width: 720px; margin: 0 auto; }

:focus-visible { outline: 2px solid var(--color-ring); outline-offset: 2px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 56px; gap: 0.5rem;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-weight: 800; font-size: 1.05rem; letter-spacing: -0.02em;
  color: var(--color-foreground); text-decoration: none;
  min-width: 0;
}
.brand-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.header-actions { display: flex; align-items: center; gap: 0.5rem; }
.header-phone {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.35rem;
  min-height: 40px; padding: 0 0.75rem;
  border: 1px solid var(--color-border-strong); border-radius: 999px;
  text-decoration: none; font-weight: 700; font-size: 0.9rem;
  color: var(--color-primary); background: var(--color-card);
  white-space: nowrap;
}
.phone-icon { flex-shrink: 0; }
.phone-full { display: none; }
.phone-short { display: inline; }

/* ---------- Animated logo ---------- */
.logo-mark { display: inline-flex; flex-shrink: 0; line-height: 0; }
.logo-mark svg { overflow: visible; }
.logo-plate { fill: #EFF6FF; stroke: var(--color-border-strong); stroke-width: 1; }
.logo-drop { fill: #DBEAFE; }
.logo-water {
  fill: #1E40AF;
  transform-box: fill-box; transform-origin: center bottom;
  animation: logo-fill 4.5s ease-in-out infinite;
}
.logo-wave {
  fill: #3B82F6;
  transform-box: fill-box; transform-origin: center;
  animation: logo-wave 2.2s ease-in-out infinite;
}
.logo-mark--nav svg { width: 32px; height: 32px; }
.logo-mark--hero svg { width: 44px; height: 44px; }

@keyframes logo-fill {
  0%, 100% { transform: translateY(4px); }
  50% { transform: translateY(-5px); }
}
@keyframes logo-wave {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(-4px); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 40px; padding: 0.6rem 1.1rem;
  border: 0; border-radius: 999px;
  background: var(--color-primary); color: var(--color-on-primary);
  font: inherit; font-weight: 700; text-decoration: none;
  transition: background var(--ease), transform var(--ease), box-shadow var(--ease);
}
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.7; cursor: wait; transform: none; }
.btn-small { min-height: 40px; padding: 0 0.95rem; font-size: 0.9rem; }
.btn-block {
  width: 100%; min-height: 56px;
  border-radius: var(--radius);
  font-size: 1.05rem;
}
.btn-cta {
  background: var(--color-accent); color: var(--color-on-accent);
  box-shadow: 0 10px 24px rgba(234, 88, 12, 0.28);
}

/* ---------- Hero (form above the fold on every size) ---------- */
.hero { padding: 1rem 0 1.5rem; }
.hero-grid { display: grid; gap: 1rem; }
.hero-copy { min-width: 0; }
.hero-brand { display: none; } /* brand already in header on phones */
.hero-copy h1 { margin-bottom: 0.4rem; }
.hero-copy .lead { display: none; }
.hero-price-line { margin: 0 0 0.75rem; font-size: 0.95rem; color: var(--color-muted-fg); }
.hero-price-line strong { color: var(--color-foreground); font-size: 1.1rem; }

.trust-row {
  display: flex; gap: 0.4rem;
  margin: 0 calc(-1 * var(--gutter)); padding: 0 var(--gutter) 0.15rem;
  list-style: none;
  overflow-x: auto; scrollbar-width: none;
  scroll-snap-type: x proximity;
}
.trust-row::-webkit-scrollbar { display: none; }
.trust-row li {
  display: inline-flex; align-items: center; gap: 0.35rem; flex-shrink: 0;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--color-border); border-radius: 999px;
  background: var(--color-card);
  font-size: 0.8rem; font-weight: 700; white-space: nowrap;
  scroll-snap-align: start;
}
.trust-row svg { flex-shrink: 0; color: #16A34A; }

/* ---------- Order form ---------- */
.order-form {
  display: grid; gap: 1rem;
  padding: 1rem;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}
.type-presets, .qty-presets { margin: 0; padding: 0; border: 0; min-inline-size: 0; }
.type-presets legend, .qty-presets legend, label {
  font-weight: 700; font-size: 0.9rem;
}
.type-presets legend, .qty-presets legend { margin-bottom: 0.45rem; padding: 0; }

/* Water type: 3-up segmented cards */
.type-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.4rem; }
.type-option { position: relative; margin: 0; }
.type-option input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.type-card {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 56px; padding: 0.5rem 0.35rem;
  border: 1.5px solid var(--color-border); border-radius: var(--radius-sm);
  background: var(--color-card); text-align: center;
  transition: border-color var(--ease), background var(--ease), box-shadow var(--ease);
}
.type-short { font-weight: 800; font-size: 0.86rem; line-height: 1.2; color: var(--color-foreground); }
.type-full { display: none; }
.type-option.is-active .type-card,
.type-option:has(input:checked) .type-card {
  border-color: var(--color-primary);
  background: #EFF6FF;
  box-shadow: inset 0 0 0 1px var(--color-primary);
}
.type-option.is-active .type-short,
.type-option:has(input:checked) .type-short { color: var(--color-primary); }
.type-option input:focus-visible + .type-card { outline: 2px solid var(--color-ring); outline-offset: 2px; }
.source-note { margin: 0.45rem 0 0; font-weight: 700; color: var(--color-primary); }

/* Quantity: full-width 6-up grid, 48px targets */
.preset-row { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0.4rem; }
.preset { position: relative; margin: 0; }
.preset input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.preset span {
  display: flex; align-items: center; justify-content: center;
  height: var(--tap);
  border: 1.5px solid var(--color-border); border-radius: var(--radius-sm);
  background: var(--color-card);
  font-weight: 800; font-size: 1.05rem; color: var(--color-foreground);
  transition: background var(--ease), border-color var(--ease), color var(--ease);
}
.preset.is-active span,
.preset:has(input:checked) span {
  background: var(--color-primary); border-color: var(--color-primary); color: var(--color-on-primary);
}
.preset input:focus-visible + span { outline: 2px solid var(--color-ring); outline-offset: 2px; }
.preset-note { margin: 0.45rem 0 0; font-weight: 700; color: #15803D; }

.field { display: grid; gap: 0.3rem; }
input, select, textarea {
  width: 100%; min-height: var(--tap);
  padding: 0.7rem 0.85rem;
  font: inherit; font-size: 16px; /* prevents iOS zoom on focus */
  color: var(--color-foreground);
  background: var(--color-muted);
  border: 1.5px solid transparent; border-radius: var(--radius-sm);
  transition: border-color var(--ease), background var(--ease);
}
input::placeholder { color: #94A3B8; }
input:focus, select:focus, textarea:focus {
  outline: none; background: var(--color-card); border-color: var(--color-primary);
}
input[aria-invalid="true"] { border-color: var(--color-destructive); background: #FEF2F2; }
fieldset[aria-invalid="true"] .preset span,
fieldset[aria-invalid="true"] .type-card { border-color: var(--color-destructive); }
.field-error { margin: 0; font-size: 0.85rem; font-weight: 600; color: var(--color-destructive); }

.checkbox { display: flex; gap: 0.6rem; align-items: flex-start; font-weight: 500; font-size: 0.9rem; }
.checkbox input {
  width: 20px; height: 20px; min-height: 0; flex-shrink: 0;
  margin: 0.1rem 0 0; padding: 0; accent-color: var(--color-primary);
}
.hp { position: absolute; left: -9999px; height: 0; overflow: hidden; }

.summary {
  padding: 0.85rem 0.95rem;
  background: var(--color-muted); border-radius: var(--radius-sm);
  font-size: 0.92rem;
}
.summary-row { display: flex; justify-content: space-between; gap: 0.75rem; margin-bottom: 0.3rem; }
.summary-row > span:first-child { min-width: 0; }
.summary-pump { font-weight: 700; color: #15803D; }
.summary-total {
  margin: 0.45rem 0 0; padding-top: 0.5rem;
  border-top: 1px dashed var(--color-border-strong);
  font-weight: 800; font-size: 1.05rem;
}

.submit-wrap { padding: 0.5rem 0 0.25rem; }
.order-form > .small.center { margin: 0; }

.alert {
  margin-bottom: 0.75rem; padding: 0.8rem 0.95rem;
  background: #FEF2F2; color: var(--color-destructive);
  border: 1px solid #FECACA; border-radius: var(--radius-sm);
  font-weight: 600;
}

/* ---------- Content sections ---------- */
.section { padding: 2.25rem 0; background: var(--color-card); }
.section-alt { background: var(--color-background); border-block: 1px solid var(--color-border); }

.proof-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.proof-head .muted { margin-bottom: 0; }
.product-proof { margin: 0; flex-shrink: 0; text-align: center; }
.product-proof img {
  width: 68px; height: auto; margin: 0 auto; padding: 0.3rem;
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
}
.product-proof figcaption { margin-top: 0.3rem; font-size: 0.72rem; font-weight: 700; color: var(--color-muted-fg); }

.points { display: grid; gap: 0.75rem; margin: 1.25rem 0 0; padding: 0; list-style: none; }
.points li {
  display: grid; gap: 0.2rem;
  padding: 0.9rem 1rem;
  background: var(--color-background); border-radius: var(--radius);
}
.points strong { font-size: 1.02rem; }
.points span { color: var(--color-muted-fg); font-size: 0.95rem; }

.steps { display: grid; gap: 1rem; margin: 1.25rem 0 0; padding: 0; list-style: none; }
.steps li { display: flex; gap: 0.8rem; align-items: flex-start; }
.steps h3 { margin-bottom: 0.15rem; }
.steps p { margin: 0; color: var(--color-muted-fg); }
.step-num {
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
  width: 2rem; height: 2rem; border-radius: 999px;
  background: var(--color-primary); color: #fff; font-weight: 800; font-size: 0.9rem;
}

.faq details { border-bottom: 1px solid var(--color-border); }
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  min-height: var(--tap); padding: 0.75rem 0;
  font-weight: 700; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; flex-shrink: 0;
  font-size: 1.3rem; font-weight: 500; color: var(--color-primary);
  transition: transform var(--ease);
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 0.9rem; color: var(--color-muted-fg); }

/* ---------- Footer ---------- */
.site-footer { padding: 2rem 0 1.5rem; background: #0F2A6B; color: #DBEAFE; font-size: 0.95rem; }
.site-footer a { color: #fff; }
.footer-grid { display: grid; gap: 1.25rem; }
.footer-brand { font-size: 1.15rem; font-weight: 800; color: #fff; }
.footer-links { display: grid; gap: 0.5rem; align-content: start; }
.footer-bottom {
  margin-top: 1.25rem; padding-top: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.18); font-size: 0.85rem;
}

.legal h2 { margin-top: 1.5rem; }
.thank-you { padding-top: 1rem; }
.confirm-list { margin: 0 0 1.2rem; padding-left: 1.2rem; }

/* ---------- Hover only on real pointers ---------- */
@media (hover: hover) {
  a:hover { color: var(--color-secondary); }
  .btn:hover { background: var(--color-primary-hover); color: var(--color-on-primary); }
  .btn-cta:hover { background: var(--color-accent-hover); color: var(--color-on-accent); transform: translateY(-1px); }
  .brand:hover .logo-water { animation-duration: 2.4s; }
  .type-option:hover .type-card, .preset:hover span { border-color: var(--color-secondary); }
}

/* ---------- ≥ 480px: roomier phones ---------- */
@media (min-width: 480px) {
  :root { --gutter: 1.25rem; }
  h1 { font-size: 1.85rem; }
  .order-form { padding: 1.25rem; }
  .type-full { display: block; margin-top: 0.15rem; font-size: 0.7rem; line-height: 1.25; color: var(--color-muted-fg); }
  .type-card { min-height: 64px; }
}

/* ---------- ≥ 640px: tablet ---------- */
@media (min-width: 640px) {
  .phone-full { display: inline; }
  .phone-short { display: none; }
  .hero { padding: 1.75rem 0 2.25rem; }
  .hero-copy .lead { display: block; }
  .trust-row { flex-wrap: wrap; margin: 0; padding: 0; overflow: visible; }
  .points { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .product-proof img { width: 88px; }
}

/* ---------- ≥ 960px: desktop, copy left + form right ---------- */
@media (min-width: 960px) {
  h1 { font-size: 2.6rem; }
  h2 { font-size: 1.85rem; }
  .hero { padding: 3rem 0 3.5rem; }
  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 480px);
    gap: 3rem; align-items: start;
  }
  .hero-copy { position: sticky; top: 96px; padding-top: 1rem; }
  .hero-brand {
    display: inline-flex; align-items: center; gap: 0.65rem;
    margin: 0 0 1rem;
    font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em;
  }
  .hero-copy .lead { font-size: 1.1rem; margin-bottom: 1rem; }
  .hero-price-line { font-size: 1rem; margin-bottom: 1.25rem; }
  .hero-price-line strong { font-size: 1.5rem; }
  .trust-row { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  .trust-row li { font-size: 0.9rem; padding: 0.45rem 0.85rem; }
  .order-form { padding: 1.5rem; }
  .section { padding: 3.5rem 0; }
  .steps { grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
  .points { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
  .faq { max-width: 760px; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .logo-water, .logo-wave { transform: none; }
}