/* Southwest Water Innovations — shared site styles */

:root {
  --teal-900: #0b3b42;
  --teal-700: #146772;
  --teal-600: #178091;
  --teal-500: #1a95a8;
  --cyan-400: #22d3ee;
  --cyan-300: #67e8f9;
  --sand-100: #faf6ef;
  --sand-200: #f2e9d8;
  --sand-300: #e6d5b8;
  --sand-400: #d4b98a;
  --cactus-500: #5f9a4a;
  --cactus-600: #4c7d3a;
  --rock-500: #8a8378;
  --ink-900: #1a1f22;
  --ink-700: #3c454a;
  --ink-500: #667075;
  --white: #ffffff;
  --danger-bg: #fdeceb;
  --danger-border: #e8b4ad;
  --danger-text: #8a2f22;
  --radius: 12px;
  --shadow: 0 2px 10px rgba(20, 40, 45, 0.08);
  --shadow-lg: 0 12px 32px rgba(20, 40, 45, 0.14);
  --max: 1140px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--sand-100);
  color: var(--ink-900);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--teal-600); text-decoration: none; }
a:hover { color: var(--teal-500); text-decoration: underline; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Top bar ---------- */

.topbar {
  background: var(--white);
  border-bottom: 1px solid rgba(20,40,45,0.08);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-900);
}
.brand:hover { text-decoration: none; }

.brand img {
  height: 56px;
  width: 56px;
  object-fit: contain;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text .name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: linear-gradient(180deg, var(--teal-700), var(--cyan-400));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-text .tag {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal-700);
  font-weight: 600;
}

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

nav.mainnav a {
  color: var(--ink-700);
  font-weight: 600;
  font-size: 14.5px;
  padding: 9px 14px;
  border-radius: 8px;
}

nav.mainnav a:hover {
  background: var(--sand-200);
  color: var(--teal-700);
  text-decoration: none;
}

nav.mainnav a.current {
  color: var(--teal-700);
  background: var(--sand-200);
}

.nav-toggle {
  display: none;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14.5px;
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--teal-600), var(--cyan-400));
  color: var(--white);
  box-shadow: var(--shadow);
}
.btn-primary:hover { color: var(--white); opacity: 0.92; text-decoration: none; }

.btn-outline {
  background: transparent;
  border-color: var(--teal-600);
  color: var(--teal-700);
}
.btn-outline:hover { background: var(--teal-600); color: var(--white); text-decoration: none; }

.btn-amazon {
  background: #FF9900;
  color: #0F1111;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-amazon:hover { background: #e88a00; color: #0F1111; text-decoration: none; }

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.product-shot {
  max-width: 320px;
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(20,40,45,0.08);
  margin: 20px 0 8px;
}

/* ---------- Hero ---------- */

.hero {
  background:
    radial-gradient(1200px 400px at 80% -10%, rgba(34,211,238,0.14), transparent),
    linear-gradient(180deg, var(--sand-200), var(--sand-100));
  padding: 56px 0 48px;
  border-bottom: 1px solid rgba(20,40,45,0.06);
}

.hero .wrap {
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.hero-copy { flex: 1 1 420px; }

.hero-copy .eyebrow {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cactus-600);
  margin-bottom: 10px;
}

.hero-copy h1 {
  margin: 0 0 14px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  color: var(--teal-900);
}

.hero-copy p.lead {
  font-size: 17px;
  color: var(--ink-700);
  max-width: 56ch;
  margin: 0 0 24px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-media {
  flex: 0 0 auto;
  width: min(320px, 90vw);
}

.hero-media img {
  border-radius: var(--radius);
}

/* ---------- Sections ---------- */

.section {
  padding: 56px 0;
}

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

.section-head { max-width: 70ch; margin: 0 auto 32px; text-align: left; }

.section-head .eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal-600);
  margin-bottom: 8px;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 3vw, 30px);
  color: var(--teal-900);
}

.section-head p { color: var(--ink-700); margin: 0; }

/* ---------- Cards / grid ---------- */

.grid {
  display: grid;
  gap: 22px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 860px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--white);
  border: 1px solid rgba(20,40,45,0.08);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card h3 { margin: 0; color: var(--teal-900); font-size: 18px; }
.card p { margin: 0; color: var(--ink-700); font-size: 14.5px; flex: 1; }

.card .pill {
  align-self: flex-start;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--cactus-600);
  background: rgba(95,154,74,0.12);
  padding: 4px 10px;
  border-radius: 999px;
}

.card .pill.cyan { color: var(--teal-700); background: rgba(26,149,168,0.12); }

.card-link {
  margin-top: 6px;
  font-weight: 700;
  color: var(--teal-600);
}

/* ---------- Problem callout ---------- */

.problem-box {
  background: var(--teal-900);
  color: var(--sand-100);
  border-radius: var(--radius);
  padding: 36px 32px;
  display: flex;
  gap: 28px;
  align-items: center;
  flex-wrap: wrap;
}

.problem-box .statement {
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  flex: 1 1 320px;
  color: var(--cyan-300);
}

.problem-box .explain {
  flex: 2 1 420px;
  color: var(--sand-200);
  font-size: 15px;
}

.problem-box .explain p { margin: 0 0 12px; }
.problem-box .explain p:last-child { margin-bottom: 0; }

/* ---------- Content pages (instructions, product detail, msds) ---------- */

.content-page .wrap { padding-top: 40px; padding-bottom: 64px; }

.breadcrumb {
  font-size: 13px;
  color: var(--ink-500);
  margin-bottom: 18px;
}
.breadcrumb a { color: var(--ink-500); }
.breadcrumb a:hover { color: var(--teal-600); }

.page-header { margin-bottom: 28px; }
.page-header .eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal-600);
  margin-bottom: 8px;
}
.page-header h1 { margin: 0 0 8px; color: var(--teal-900); font-size: clamp(24px, 3.4vw, 34px); }
.page-header .sub { color: var(--ink-700); font-size: 16px; max-width: 70ch; }

.panel {
  background: var(--white);
  border: 1px solid rgba(20,40,45,0.08);
  border-radius: var(--radius);
  padding: 26px 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.panel h2 { margin-top: 0; color: var(--teal-900); font-size: 19px; }
.panel h3 { color: var(--teal-800, var(--teal-700)); font-size: 15.5px; }

.callout {
  border-left: 4px solid var(--cactus-500);
  background: rgba(95,154,74,0.08);
  padding: 14px 18px;
  border-radius: 0 8px 8px 0;
  margin: 18px 0;
  font-size: 14.5px;
}

.callout.warn {
  border-left-color: #c47a1f;
  background: rgba(196,122,31,0.09);
}

.callout.danger {
  border-left-color: var(--danger-text);
  background: var(--danger-bg);
  color: var(--danger-text);
}

.disclaimer-banner {
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: var(--danger-text);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: 14px;
  margin-bottom: 28px;
}
.disclaimer-banner strong { display: block; margin-bottom: 4px; }

ul.check-list, ul.plain-list { margin: 0; padding-left: 22px; }
ul.check-list li, ul.plain-list li { margin-bottom: 8px; }

/* ---------- Tables ---------- */

.table-wrap { overflow-x: auto; margin-bottom: 6px; }

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

table.data caption {
  text-align: left;
  font-size: 12px;
  color: var(--ink-500);
  margin-bottom: 10px;
  font-family: "Consolas", ui-monospace, monospace;
}

table.data caption b,
table.data caption strong {
  color: var(--ink-900);
  font-weight: 700;
}

table.data th, table.data td {
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--sand-300);
}

table.data th {
  font-weight: 700;
  color: var(--teal-800, var(--teal-700));
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--sand-200);
}

table.data td {
  font-variant-numeric: tabular-nums;
}

table.data td:first-child {
  white-space: nowrap;
  font-weight: 600;
  color: var(--ink-900);
}

table.data.mini { font-size: 12.5px; }
table.data.mini th, table.data.mini td { padding: 7px 10px; }

.swatch {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  margin-right: 7px;
}

.table-block {
  padding-top: 18px;
  margin-top: 18px;
  border-top: 1px solid var(--sand-300);
}
.table-block:first-of-type { padding-top: 0; margin-top: 0; border-top: none; }
.table-block h3 { margin: 0 0 8px; }

/* ---------- MSDS sheet layout ---------- */

.sds-meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 24px;
  font-size: 14px;
  margin-bottom: 6px;
}
@media (max-width: 640px) { .sds-meta { grid-template-columns: 1fr; } }
.sds-meta dt { font-weight: 700; color: var(--ink-500); font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.05em; }
.sds-meta dd { margin: 0 0 10px; color: var(--ink-900); }

/* ---------- Forms ---------- */

form.contact-form {
  display: grid;
  gap: 16px;
  max-width: 640px;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-weight: 700; font-size: 13.5px; color: var(--ink-700); }

.field input, .field select, .field textarea {
  padding: 11px 13px;
  border: 1px solid rgba(20,40,45,0.18);
  border-radius: 8px;
  font-size: 14.5px;
  font-family: inherit;
  background: var(--white);
  color: var(--ink-900);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--cyan-400);
  outline-offset: 1px;
}

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .field-row { grid-template-columns: 1fr; } }

.form-note {
  font-size: 13px;
  color: var(--ink-500);
}

/* ---------- Footer ---------- */

footer.site-footer {
  background: var(--teal-900);
  color: var(--sand-200);
  margin-top: 40px;
}

footer.site-footer .wrap {
  padding: 40px 24px 28px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 28px;
}

@media (max-width: 760px) {
  footer.site-footer .wrap { grid-template-columns: 1fr 1fr; }
}

footer.site-footer h4 {
  color: var(--cyan-300);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 14px;
}

footer.site-footer a { color: var(--sand-200); font-size: 14px; }
footer.site-footer a:hover { color: var(--cyan-300); }

footer.site-footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }

footer.site-footer .brand-foot {
  display: flex;
  align-items: center;
  gap: 12px;
}
footer.site-footer .brand-foot img { height: 48px; width: 48px; }
footer.site-footer .brand-foot .name { color: var(--white); font-weight: 800; font-size: 16px; }
footer.site-footer p.small { color: var(--sand-300); font-size: 13px; max-width: 40ch; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding: 16px 24px;
  font-size: 12.5px;
  color: var(--sand-300);
  text-align: center;
}

/* ---------- Mobile nav ---------- */

@media (max-width: 900px) {
  .topbar .wrap { flex-wrap: wrap; }
  nav.mainnav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding-bottom: 10px;
  }
  nav.mainnav.open { display: flex; }
  nav.mainnav a { padding: 12px 10px; }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid rgba(20,40,45,0.15);
    background: var(--white);
    cursor: pointer;
  }
}

/* ---------- Dosing calculator ---------- */

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 28px;
}

@media (max-width: 700px) {
  .calc-grid { grid-template-columns: 1fr; }
}

.calc-grid .field.span-2 { grid-column: 1 / -1; }

.volume-row { display: flex; gap: 8px; }
.volume-row input[type="number"] { flex: 1 1 auto; min-width: 0; }
.volume-row select { flex: 0 0 auto; }

.radio-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.radio-row label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-weight: 500;
  font-size: 14.5px;
  color: var(--ink-900);
  cursor: pointer;
}

.radio-row input[type="radio"],
.radio-row input[type="checkbox"],
.field > label > input[type="checkbox"] {
  margin-top: 3px;
  accent-color: var(--teal-600);
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.slider-row input[type="range"] {
  flex: 1 1 auto;
  accent-color: var(--teal-600);
}

.slider-value {
  font-family: "Consolas", ui-monospace, monospace;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--teal-800, var(--teal-700));
  white-space: nowrap;
  min-width: 78px;
  text-align: right;
}

.slider-bounds {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--ink-500);
  font-family: "Consolas", ui-monospace, monospace;
}

.result-card {
  background: var(--sand-100);
  border: 1px solid rgba(20,40,45,0.08);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 16px;
}
.result-card:last-child { margin-bottom: 0; }

.result-card h3 {
  margin: 0 0 4px;
  font-size: 15.5px;
  color: var(--teal-900);
  display: flex;
  align-items: center;
  gap: 8px;
}

.result-card .result-sub {
  font-size: 12.5px;
  color: var(--ink-500);
  margin: 0 0 12px;
}

.result-figures {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

@media (max-width: 560px) {
  .result-figures { grid-template-columns: 1fr; }
}

.result-figure {
  background: var(--white);
  border: 1px solid rgba(20,40,45,0.08);
  border-radius: 8px;
  padding: 10px 12px;
  text-align: center;
}

.result-figure .num {
  font-family: "Consolas", ui-monospace, monospace;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink-900);
  display: block;
}

.result-figure .unit {
  font-size: 11px;
  color: var(--ink-500);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.result-empty {
  color: var(--ink-500);
  font-size: 14px;
  font-style: italic;
}