/* Aquapulse Irrigation — self-paced course preview
   Tokens, header and footer match aquapulseirrigation.com. */

:root {
  --deep: #08323c;
  --deep-2: #0b4150;
  --lagoon: #0e6674;
  --aqua: #1a8486;
  --spray: #4fb8b2;
  --spray-soft: #d8f0ee;
  --leaf: #2f6f48;
  --sand: #f3efe6;
  --mist: #eef6f5;
  --foam: #f7fbfa;
  --paper: #fcfcfa;
  --ink: #13282e;
  --ink-soft: #3d555c;
  --line: #d3e3e1;
  --white: #ffffff;
  --gold: #c9a15a;
  --gold-soft: #f6f1e4;
  --gold-line: #e3d5b0;
  --danger: #9b3b2c;
  --danger-soft: #f8e8e4;
  --ok: #2f6f48;
  --ok-soft: #e5f0e8;
  --focus: #1a8486;
  --header-h: 4.25rem;
  --radius: 1rem;
  --radius-sm: 0.7rem;
  --shadow: 0 12px 32px rgba(8, 50, 60, 0.08);
  --shadow-soft: 0 4px 18px rgba(8, 50, 60, 0.06);
  --font: "Segoe UI", "Avenir Next", "Helvetica Neue", "Nimbus Sans", Arial, system-ui, sans-serif;
  --space: 1.25rem;
  --max: 70rem;
  --lesson-max: 48rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 0.75rem);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

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

a {
  color: var(--lagoon);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}
a:hover { color: var(--deep); }

:focus-visible {
  outline: 3px solid var(--spray);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  background: var(--deep);
  color: var(--white);
  padding: 0.6rem 1rem;
  border-radius: 0.4rem;
}
.skip-link:focus { top: 1rem; color: var(--white); }

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}
.container-narrow {
  width: min(100% - 2rem, var(--lesson-max));
  margin-inline: auto;
}

/* ——— Header (matches the live site) ——— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 97%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  text-decoration: none;
  min-width: 0;
  margin-right: auto;
}
.logo:hover { color: var(--ink); }

.logo-mark {
  width: auto;
  height: 2.45rem;
  aspect-ratio: 138 / 94;
  flex-shrink: 0;
  color: var(--deep);
}

.logo-type {
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.logo-word { white-space: nowrap; }
.logo-aqua, .logo-pulse { font-size: 1.05rem; }
.logo-aqua { font-weight: 650; color: var(--lagoon); }
.logo-pulse { font-weight: 750; color: var(--deep); }
.logo-sub {
  display: block;
  margin-top: 0.12rem;
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.header-phone {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--deep);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
  flex-shrink: 0;
}
.header-phone:hover { color: var(--lagoon); }
.header-phone svg, .btn svg {
  width: 1.15rem;
  height: 1.15rem;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 0.65rem;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}
.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 1.15rem;
  height: 2px;
  background: var(--deep);
  border-radius: 2px;
  position: relative;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
}
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }
.nav-open .nav-toggle-bars { background: transparent; }
.nav-open .nav-toggle-bars::before { top: 0; transform: rotate(45deg); }
.nav-open .nav-toggle-bars::after { top: 0; transform: rotate(-45deg); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}
.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
.site-nav a:hover { color: var(--lagoon); }
.site-nav a[aria-current="page"] { color: var(--lagoon); }
.site-nav .nav-cta {
  margin-left: 0.25rem;
  color: var(--white);
}
.site-nav .nav-cta:hover { color: var(--white); }

/* ——— Buttons ——— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  font: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.2;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
  background: none;
  color: inherit;
}
.btn:active { transform: translateY(1px); }
.btn:disabled, .btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}
.btn-primary {
  background: var(--lagoon);
  color: var(--white);
  border-color: var(--lagoon);
}
.btn-primary:hover {
  background: var(--deep);
  border-color: var(--deep);
  color: var(--white);
}
.btn-ghost {
  background: transparent;
  color: var(--deep);
  border-color: color-mix(in srgb, var(--deep) 22%, transparent);
}
.btn-ghost:hover { background: var(--mist); color: var(--deep); }
.btn-block { width: 100%; }

/* ——— Preview banner ——— */
.preview-banner {
  background: var(--deep);
  color: #e8f4f3;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border-bottom: 3px solid var(--gold);
}
.preview-banner .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.55rem 0;
  text-align: center;
}
.preview-pill {
  display: inline-block;
  background: var(--gold);
  color: var(--deep);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.18rem 0.5rem;
  border-radius: 999px;
  flex-shrink: 0;
}

/* ——— Typography ——— */
.eyebrow {
  margin: 0 0 0.7rem;
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lagoon);
}
h1, h2, h3, h4 {
  margin: 0;
  color: var(--deep);
  letter-spacing: -0.03em;
  line-height: 1.15;
}
h1 { font-size: clamp(2rem, 4.4vw, 3.1rem); font-weight: 780; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 750; }
h3 { font-size: 1.15rem; font-weight: 750; letter-spacing: -0.02em; }
h4 { font-size: 1.02rem; font-weight: 750; }
.lede, .section-intro {
  margin: 1rem 0 0;
  color: var(--ink-soft);
  font-size: 1.125rem;
  max-width: 42rem;
}
.section { padding: 4rem 0; }
.section-tint {
  background: linear-gradient(180deg, var(--mist) 0%, #e7f3f1 100%);
}
.section-sand { background: linear-gradient(180deg, var(--paper) 0%, var(--sand) 100%); }
.section-head { margin-bottom: 2.25rem; max-width: 42rem; }
.section-head h2 { margin-top: 0.15rem; }

/* ——— Landing hero ——— */
.hero {
  padding: 2.5rem 0 3rem;
  background:
    radial-gradient(ellipse 70% 50% at 90% 0%, #d9efef 0%, transparent 60%),
    linear-gradient(180deg, var(--foam) 0%, var(--paper) 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 2.5rem 3rem;
  align-items: center;
}
.hero-photo {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: 62% 50%;
  border-radius: 1.75rem;
  box-shadow: var(--shadow);
  background: var(--mist);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
  align-items: center;
}
.hero-note {
  margin: 0.85rem 0 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
  max-width: 36rem;
}
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.7rem;
  margin-top: 1.15rem;
}
.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.28rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 650;
  color: var(--deep);
  box-shadow: var(--shadow-soft);
}

/* ——— Cards / grids ——— */
.learn-grid, .audience-grid, .module-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}
.learn-grid { grid-template-columns: repeat(2, 1fr); }
.audience-grid { grid-template-columns: repeat(3, 1fr); }
.module-grid { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem 1.3rem 1.4rem;
  box-shadow: var(--shadow-soft);
}
.card p { margin: 0.5rem 0 0; color: var(--ink-soft); font-size: 0.98rem; }
.card-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  background: var(--mist);
  color: var(--lagoon);
  display: grid;
  place-items: center;
  margin-bottom: 0.7rem;
}
.card-icon svg { width: 1.45rem; height: 1.45rem; }

/* Landing module list */
.module-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.85rem 1rem;
  align-items: start;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
a.module-card:hover {
  border-color: var(--spray);
  box-shadow: var(--shadow);
  color: inherit;
}
.module-num {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.7rem;
  background: var(--deep);
  color: var(--gold);
  font-weight: 800;
  font-size: 0.95rem;
  display: grid;
  place-items: center;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.module-card h3 { font-size: 1.05rem; margin: 0; }
.module-card .mod-meta {
  margin: 0.2rem 0 0;
  font-size: 0.82rem;
  font-weight: 650;
  color: var(--lagoon);
}
.module-card .mod-blurb {
  grid-column: 2 / 3;
  margin: 0;
}
.mod-status {
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--lagoon);
  background: var(--mist);
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.mod-status.locked {
  color: var(--ink-soft);
  background: var(--sand);
}
.mod-status.complete {
  color: var(--ok);
  background: var(--ok-soft);
}
.lock-icon { width: 0.9rem; height: 0.9rem; }

.callout {
  border-radius: var(--radius-sm);
  padding: 1rem 1.15rem;
  margin: 1.15rem 0;
  border: 1px solid var(--gold-line);
  background: var(--gold-soft);
}
.callout.warn {
  background: var(--danger-soft);
  border-color: color-mix(in srgb, var(--danger) 30%, var(--line));
}
.callout.tip {
  background: var(--mist);
  border-color: var(--line);
}
.callout strong { color: var(--deep); }
.callout p { margin: 0.3rem 0 0; }
.callout p:first-child { margin: 0; }

/* ——— Dashboard ——— */
.dash-hero {
  padding: 2rem 0 1.5rem;
  background: linear-gradient(180deg, var(--foam) 0%, var(--paper) 100%);
}
.progress-panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 0.15rem);
  padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow-soft);
  margin-top: 1.4rem;
}
.progress-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  margin-bottom: 0.6rem;
}
.progress-top strong { color: var(--deep); }
.progress-top span { color: var(--ink-soft); font-size: 0.92rem; }
.progress-track {
  height: 0.7rem;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--lagoon), var(--spray));
  border-radius: 999px;
  transition: width 0.35s ease;
}
.dash-list { display: grid; gap: 0.75rem; }
.dash-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.9rem 1rem;
  align-items: center;
  padding: 1.05rem 1.15rem;
  text-align: left;
  width: 100%;
  font: inherit;
  color: inherit;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  text-decoration: none;
  cursor: pointer;
}
.dash-item:hover { border-color: var(--spray); }
.dash-item.is-locked {
  cursor: pointer;
}
.dash-item.is-locked:hover { border-color: var(--gold-line); }
.dash-item h3 { font-size: 1.08rem; }
.dash-item p { margin: 0.2rem 0 0; font-size: 0.9rem; color: var(--ink-soft); }
.reset-row {
  margin: 1.5rem 0 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
}
.reset-row button {
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  color: var(--lagoon);
  font-weight: 700;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

/* ——— Locked screen ——— */
.locked-screen {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(8, 32, 38, 0.72);
  display: grid;
  place-items: center;
  padding: 1.25rem;
}
.locked-screen[hidden] { display: none; }
.locked-card {
  width: min(100%, 32rem);
  background: var(--paper);
  border-radius: 1.25rem;
  padding: 2rem 1.6rem 1.6rem;
  text-align: center;
  box-shadow: 0 24px 60px rgba(8, 50, 60, 0.28);
  border-top: 4px solid var(--gold);
}
.locked-icon {
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: var(--gold-soft);
  color: var(--deep);
  display: grid;
  place-items: center;
  border: 1px solid var(--gold-line);
}
.locked-icon svg { width: 2rem; height: 2rem; }
.locked-card h2 { margin-bottom: 0.6rem; }
.locked-card p { margin: 0 0 0.7rem; color: var(--ink-soft); }
.locked-card .btn { margin-top: 0.4rem; min-width: 12rem; }
.locked-actions { display: grid; gap: 0.65rem; justify-items: center; margin-top: 1.1rem; }

/* Enroll preview toast / dialog */
.enroll-dialog {
  border: 0;
  padding: 0;
  width: min(92vw, 28rem);
  background: transparent;
}
.enroll-dialog::backdrop { background: rgba(8, 32, 38, 0.72); }
.enroll-card {
  background: var(--paper);
  border-radius: 1.25rem;
  padding: 1.7rem 1.5rem 1.4rem;
  box-shadow: 0 24px 60px rgba(8, 50, 60, 0.28);
  border-top: 4px solid var(--gold);
}
.enroll-card h2 { margin-bottom: 0.55rem; }
.enroll-card p { margin: 0 0 0.7rem; color: var(--ink-soft); }

/* ——— Lessons ——— */
.lesson-page { background: var(--foam); }
.lesson-bar {
  overflow: hidden;
  position: sticky;
  top: var(--header-h);
  z-index: 40;
  background: color-mix(in srgb, var(--paper) 97%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.lesson-bar-inner {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-height: 3.15rem;
  padding: 0.35rem 0;
}
.back-modules {
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--lagoon);
  white-space: nowrap;
  flex-shrink: 0;
}
.back-modules:hover { color: var(--deep); }
.lesson-status {
  flex: 1;
  min-width: 0;
}
.lesson-status-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--deep);
  margin-bottom: 0.25rem;
  gap: 0.5rem;
}
.lesson-dots {
  display: flex;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.lesson-dots a, .lesson-dots button {
  width: 100%;
  height: 0.45rem;
  border-radius: 999px;
  background: var(--line);
  border: 0;
  padding: 0;
  cursor: pointer;
  display: block;
  text-indent: -999px;
  overflow: hidden;
}
.lesson-dots .is-current a,
.lesson-dots .is-current button { background: var(--lagoon); }
.lesson-dots .is-done a,
.lesson-dots .is-done button { background: var(--spray); }
.lesson-dots li { flex: 1; }

.lesson {
  padding: 1.75rem 0 7.5rem;
}
.lesson[hidden] { display: none !important; }
.lesson-kicker {
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 0.4rem;
}
.lesson h1 { font-size: clamp(1.6rem, 3.4vw, 2.15rem); max-width: 22ch; }
.lesson h2 { font-size: 1.25rem; margin: 1.6rem 0 0.6rem; }
.lesson h3 { margin: 1.2rem 0 0.45rem; }
.lesson p { margin: 0 0 0.85rem; }
.lesson ul, .lesson ol { margin: 0 0 1rem; padding-left: 1.25rem; }
.lesson li { margin-bottom: 0.35rem; }
.lesson li:last-child { margin-bottom: 0; }

.objectives {
  background: var(--gold-soft);
  border: 1px solid var(--gold-line);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  margin: 1.15rem 0 1.35rem;
}
.objectives h2 { margin: 0 0 0.4rem; font-size: 1rem; }
.objectives ul { margin: 0; }

.formula {
  font-weight: 700;
  color: var(--deep);
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 4px solid var(--gold);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  margin: 1rem 0;
  font-size: 1.02rem;
}

figure.diagram {
  margin: 1.15rem 0 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem;
  background: var(--white);
  box-shadow: var(--shadow-soft);
}
.figure-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.figure-scroll svg, .figure-scroll img { width: 100%; height: auto; min-width: 0; }
figcaption {
  font-size: 0.88rem;
  color: var(--lagoon);
  margin-top: 0.55rem;
  text-align: center;
}

.table-wrap { overflow-x: auto; margin: 0.8rem 0 1.15rem; -webkit-overflow-scrolling: touch; }
table.data {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
  min-width: 28rem;
}
table.data th {
  background: var(--deep);
  color: var(--white);
  text-align: left;
  padding: 0.5rem 0.65rem;
  font-weight: 700;
}
table.data td {
  padding: 0.5rem 0.65rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  background: var(--white);
}
table.data tr:nth-child(even) td { background: var(--foam); }
table.data caption {
  caption-side: bottom;
  text-align: left;
  font-size: 0.82rem;
  color: var(--ink-soft);
  padding-top: 0.5rem;
}
td.hi { background: #f8e8e4 !important; color: var(--danger); font-weight: 650; }

/* Key term chips / tooltips */
.term {
  border-bottom: 1.5px dotted var(--lagoon);
  cursor: help;
  font-weight: 650;
  color: var(--deep);
  position: relative;
}
.term:hover, .term:focus { color: var(--lagoon); }
.tooltip-pop {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 0.45rem);
  transform: translateX(-50%);
  background: var(--deep);
  color: #e8f4f3;
  font-size: 0.82rem;
  font-weight: 500;
  line-height: 1.4;
  padding: 0.45rem 0.65rem;
  border-radius: 0.5rem;
  width: max(12rem, 100%);
  min-width: 12rem;
  max-width: 18rem;
  z-index: 5;
  box-shadow: var(--shadow);
  pointer-events: none;
}
.tooltip-pop::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 100%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--deep);
}

/* Flip cards */
.flip-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  margin: 1rem 0 1.25rem;
}
.flip-card {
  min-height: 7.2rem;
  perspective: 800px;
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  text-align: left;
  cursor: pointer;
  width: 100%;
}
.flip-inner {
  position: relative;
  width: 100%;
  min-height: 7.2rem;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.45s ease;
  border-radius: var(--radius-sm);
}
.flip-card.is-flipped .flip-inner { transform: rotateY(180deg); }
.flip-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  padding: 1rem 1.05rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: var(--shadow-soft);
}
.flip-front { background: var(--white); }
.flip-back {
  background: var(--deep);
  color: #e8f4f3;
  transform: rotateY(180deg);
  border-color: var(--deep);
}
.flip-front strong, .flip-back strong {
  display: block;
  color: var(--deep);
  margin-bottom: 0.25rem;
}
.flip-back strong { color: var(--gold); }
.flip-hint {
  margin-top: 0.45rem;
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--lagoon);
}
.flip-back .flip-hint { color: var(--spray); }

/* Calculator */
.calc {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem 1.2rem 1.3rem;
  box-shadow: var(--shadow);
  margin: 1.15rem 0 1.35rem;
}
.calc h2, .calc h3 { margin: 0 0 0.35rem; }
.calc .calc-lead { margin: 0 0 1rem; color: var(--ink-soft); font-size: 0.95rem; }
.calc-tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1rem;
  background: var(--mist);
  padding: 0.25rem;
  border-radius: 999px;
  width: fit-content;
  max-width: 100%;
}
.calc-tabs button {
  border: 0;
  background: transparent;
  font: inherit;
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--ink-soft);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
}
.calc-tabs button[aria-selected="true"] {
  background: var(--white);
  color: var(--deep);
  box-shadow: var(--shadow-soft);
}
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem 1rem;
  align-items: end;
}
.field { display: grid; gap: 0.3rem; }
.field label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--deep);
}
.field input, .field select {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: var(--foam);
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  padding: 0.7rem 0.8rem;
  appearance: none;
}
.field input:focus, .field select:focus {
  outline: 3px solid color-mix(in srgb, var(--spray) 55%, transparent);
  outline-offset: 1px;
  border-color: var(--aqua);
  background: var(--white);
}
.calc-result {
  grid-column: 1 / -1;
  background: var(--mist);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
}
.calc-result .value {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--deep);
  letter-spacing: -0.03em;
  line-height: 1.2;
}
.calc-result .sub { color: var(--ink-soft); margin: 0.25rem 0 0; font-size: 0.92rem; }
.calc-note { margin: 0.75rem 0 0; font-size: 0.82rem; color: var(--ink-soft); }

/* Try-it scenario */
.scenario {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem 1.2rem 1.3rem;
  box-shadow: var(--shadow-soft);
  margin: 1rem 0 1.4rem;
}
.scenario-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--deep);
  background: var(--gold);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  margin-bottom: 0.55rem;
}
.scenario h3 { margin: 0 0 0.25rem; }
.scenario .where {
  margin: 0 0 0.7rem;
  font-size: 0.9rem;
  color: var(--lagoon);
  font-weight: 650;
}
.options { display: grid; gap: 0.55rem; margin: 0.85rem 0; }
.option {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.7rem;
  align-items: start;
  text-align: left;
  width: 100%;
  font: inherit;
  line-height: 1.45;
  padding: 0.8rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--line);
  background: var(--foam);
  color: var(--ink);
  cursor: pointer;
}
.option:hover { border-color: var(--aqua); background: var(--white); }
.option .letter {
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 50%;
  background: var(--white);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 0.8rem;
  color: var(--deep);
  flex-shrink: 0;
}
.option.is-correct {
  border-color: var(--ok);
  background: var(--ok-soft);
}
.option.is-wrong {
  border-color: var(--danger);
  background: var(--danger-soft);
}
.option:disabled { cursor: default; }
.feedback {
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  margin-top: 0.4rem;
  font-size: 0.95rem;
}
.feedback p { margin: 0 0 0.4rem; }
.feedback p:last-child { margin: 0; }
.feedback.ok { background: var(--ok-soft); border: 1px solid color-mix(in srgb, var(--ok) 35%, var(--line)); }
.feedback.bad { background: var(--danger-soft); border: 1px solid color-mix(in srgb, var(--danger) 30%, var(--line)); }
.feedback[hidden] { display: none; }

/* Quiz */
.quiz-q { margin-bottom: 1.5rem; }
.quiz-q h3 { margin-bottom: 0.7rem; font-size: 1.08rem; }
.score-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.3rem 1.2rem;
  text-align: center;
  box-shadow: var(--shadow);
  margin-top: 0.5rem;
}
.score-card .big {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--deep);
  letter-spacing: -0.04em;
  line-height: 1;
  margin: 0.3rem 0 0.5rem;
}
.score-card.pass { border-top: 4px solid var(--ok); }
.score-card.fail { border-top: 4px solid var(--gold); }

/* Lesson footer nav */
.lesson-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  background: var(--paper);
  border-top: 1px solid var(--line);
  box-shadow: 0 -8px 24px rgba(8, 50, 60, 0.06);
  padding: 0.7rem 0 calc(0.7rem + env(safe-area-inset-bottom));
}
.lesson-nav-inner {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: center;
}
.lesson-nav .btn { min-width: 8.5rem; }

/* Footer (matches the live site) */
.site-footer {
  background: var(--deep);
  color: #cfe6e4;
  padding: 2.25rem 0 2.4rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: flex-end;
  flex-wrap: wrap;
}
.footer-logo { color: var(--white); }
.footer-logo:hover { color: var(--white); }
.footer-logo .logo-aqua { color: var(--spray); }
.footer-logo .logo-pulse { color: var(--white); }
.footer-logo .logo-sub { color: #9ec4c2; }
.footer-logo .logo-mark { color: #ffffff; }
.footer-meta { text-align: right; }
.footer-meta p { margin: 0 0 0.3rem; }
.footer-meta a {
  color: var(--spray);
  font-weight: 650;
  text-decoration: none;
}
.footer-meta a:hover { color: var(--white); text-decoration: underline; }
.copyright {
  margin-top: 0.7rem !important;
  font-size: 0.85rem;
  color: #8fb3b1;
}

/* CTA band */
.cta-band {
  background: var(--deep);
  color: #e8f4f3;
  padding: 3.25rem 0;
  text-align: center;
}
.cta-band h2 { color: var(--white); }
.cta-band p { margin: 0.8rem auto 0; max-width: 36rem; color: #cfe6e4; }
.cta-band .hero-actions { justify-content: center; }
.cta-band .btn-ghost {
  color: var(--white);
  border-color: color-mix(in srgb, var(--white) 35%, transparent);
}
.cta-band .btn-ghost:hover { background: color-mix(in srgb, var(--white) 10%, transparent); color: var(--white); }
.cta-band .hero-note { color: #9ec4c2; margin-inline: auto; }

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 1rem 1rem;
    box-shadow: 0 18px 28px rgba(8, 50, 60, 0.12);
  }
  .header-inner { position: relative; }
  .nav-open .site-nav { display: flex; }
  .site-nav a {
    padding: 0.8rem 0.25rem;
    border-bottom: 1px solid var(--line);
  }
  .site-nav .nav-cta {
    margin: 0.75rem 0 0.25rem;
    text-align: center;
    border-bottom: 0;
  }
  .header-phone { font-size: 0.9rem; }
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art { order: -1; max-width: 32rem; }
  h1 { max-width: none; }
  .learn-grid, .audience-grid, .module-grid, .flip-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .header-phone { font-size: 0.85rem; gap: 0.3rem; }
  .hero { padding-top: 1.4rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .section { padding: 3.25rem 0; }
  .footer-inner, .footer-meta { text-align: left; align-items: flex-start; }
  .module-card { grid-template-columns: auto 1fr; }
  .module-card .mod-status { grid-column: 2; justify-self: start; }
  .module-card .mod-blurb { grid-column: 2; }
  .dash-item { grid-template-columns: auto 1fr; }
  .dash-item .mod-status { grid-column: 2; justify-self: start; }
  .calc-grid { grid-template-columns: 1fr; }
  .calc-tabs { width: 100%; }
  .calc-tabs button { flex: 1; }
  .lesson-nav .btn { min-width: 0; flex: 1; }
  .figure-scroll svg, .figure-scroll img { width: 100%; min-width: 20rem; }
  .preview-banner .container { flex-direction: column; gap: 0.25rem; }
  .lesson { padding-bottom: 6.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .flip-inner, .progress-fill { transition: none; }
}

[data-chrome-header],
[data-chrome-footer] { display: contents; }
.lesson-page [data-chrome-footer] { display: none; }
#lesson-title-chip {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 600;
  color: var(--ink-soft);
}
.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath d='M3 6l5 5 5-5' fill='none' stroke='%2308323c' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.2rem;
}

.diagram-notes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem;
  margin-top: 0.85rem;
}
.diagram-note {
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--line);
  background: var(--foam);
  padding: 0.7rem 0.85rem;
  font-size: 0.92rem;
}
.diagram-note.alt {
  background: var(--gold-soft);
  border-color: var(--gold-line);
}
.diagram-note strong { display: block; color: var(--deep); margin-bottom: 0.2rem; }
.diagram-note p { margin: 0; color: var(--ink-soft); font-size: 0.88rem; }
@media (max-width: 720px) {
  .diagram-notes { grid-template-columns: 1fr; }
  .lesson-bar-inner { flex-wrap: wrap; gap: 0.4rem 0.75rem; }
  .back-modules { width: 100%; }
  #lesson-title-chip { display: none; }
  .preview-banner .container { padding: 0.45rem 0; font-size: 0.8rem; }
}