/* Aqualytics marketing site — tokens from app_colors.dart */
:root {
  --navy: #121b22;
  --surface: #23303b;
  --surface-elevated: #2a3845;
  --primary: #4fbdbe;
  --primary-pressed: #3aa8a9;
  --primary-muted: #2f7f86;
  --accent: #5ec8e8;
  --text: #f4f7f9;
  --text-secondary: #9aa8b4;
  --success: #34d399;
  --warning: #fbbf24;
  --error: #f87171;
  --radius: 16px;
  --radius-lg: 24px;
  --max: 1120px;
  --font-display: "Plus Jakarta Sans", system-ui, sans-serif;
  --font-body: "DM Sans", system-ui, sans-serif;
  --glow: 0 0 24px rgba(79, 189, 190, 0.35);
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--navy);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--accent);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1em;
  color: var(--text-secondary);
}

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.section {
  padding: 5rem 0;
}

.section--tight {
  padding: 3.5rem 0;
}

.section__eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--text);
  max-width: 18ch;
}

.section__lead {
  font-size: 1.1rem;
  max-width: 48ch;
  margin-bottom: 2rem;
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(18, 27, 34, 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(79, 189, 190, 0.12);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
}

.logo:hover {
  color: var(--text);
}

.logo img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav a {
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
}

.nav a:hover,
.nav a.is-active {
  color: var(--primary);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  background: var(--primary);
  color: var(--navy) !important;
  font-weight: 600;
  box-shadow: var(--glow);
  transition: background 0.2s, transform 0.2s;
}

.nav__cta:hover {
  background: var(--accent);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(79, 189, 190, 0.35);
  border-radius: 12px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    padding: 1.25rem 1.25rem 1.5rem;
    background: rgba(18, 27, 34, 0.97);
    border-bottom: 1px solid rgba(79, 189, 190, 0.15);
    gap: 0.25rem;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav a {
    padding: 0.75rem 0.5rem;
  }

  .nav__cta {
    justify-content: center;
    margin-top: 0.5rem;
  }
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.35rem;
  border-radius: 14px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--primary);
  color: var(--navy);
  box-shadow: var(--glow);
}

.btn--primary:hover {
  background: var(--accent);
  color: var(--navy);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(79, 189, 190, 0.45);
  color: var(--primary);
}

.btn--ghost:hover {
  border-color: var(--primary);
  color: var(--accent);
  background: rgba(79, 189, 190, 0.08);
}

.btn--store {
  min-width: 180px;
  background: var(--surface);
  border: 1px solid rgba(79, 189, 190, 0.35);
  color: var(--text);
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
  padding: 0.75rem 1.2rem;
}

.btn--store:hover {
  border-color: var(--primary);
  color: var(--text);
  box-shadow: var(--glow);
}

.btn--store small {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.btn--store strong {
  font-size: 1.05rem;
  font-weight: 700;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  isolation: isolate;
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
}

.hero__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(18, 27, 34, 0.55) 0%, rgba(18, 27, 34, 0.35) 35%, rgba(18, 27, 34, 0.92) 78%, var(--navy) 100%),
    radial-gradient(ellipse 60% 50% at 70% 40%, rgba(79, 189, 190, 0.18), transparent 60%);
}

.hero__content {
  padding: 4rem 0 4.5rem;
  max-width: 640px;
}

.hero__brand {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 4.75rem);
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text);
  margin: 0 0 0.35em;
  text-shadow: 0 4px 40px rgba(0, 0, 0, 0.45);
}

.hero__tagline {
  font-family: var(--font-display);
  font-size: clamp(0.85rem, 2vw, 1.05rem);
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--primary);
  margin: 0 0 1rem;
}

.hero__lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 36ch;
  margin-bottom: 1.75rem;
}

.hero__lead em {
  color: var(--text);
  font-style: normal;
  font-weight: 600;
}

/* —— Features —— */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

@media (max-width: 900px) {
  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }
}

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

.feature-card {
  background: var(--surface);
  border: 1px solid rgba(79, 189, 190, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.4rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  border-color: rgba(79, 189, 190, 0.35);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.feature-card__icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(79, 189, 190, 0.12);
  border: 1px solid rgba(79, 189, 190, 0.25);
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
}

.feature-card p {
  font-size: 0.95rem;
  margin: 0;
}

/* —— Download —— */
.download {
  background:
    radial-gradient(ellipse 70% 80% at 50% 0%, rgba(79, 189, 190, 0.12), transparent 55%),
    var(--navy);
  text-align: center;
}

.download .section__title {
  max-width: none;
  margin-inline: auto;
}

.download .section__lead {
  margin-inline: auto;
}

.download .btn-row {
  justify-content: center;
}

/* —— Manual / charts —— */
.manual-intro {
  margin-bottom: 2.5rem;
}

.chart-list {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.chart-card {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 1.75rem;
  align-items: center;
  background: var(--surface);
  border: 1px solid rgba(79, 189, 190, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  overflow: hidden;
}

.chart-card--reverse {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
}

.chart-card--reverse .chart-card__visual {
  order: 2;
}

.chart-card--reverse .chart-card__body {
  order: 1;
}

.chart-card--featured {
  border-color: rgba(79, 189, 190, 0.4);
  box-shadow: 0 0 0 1px rgba(79, 189, 190, 0.15), var(--glow);
}

.chart-card--span {
  grid-template-columns: 1fr;
}

.chart-card--span .chart-card__visual {
  max-width: 640px;
  margin-inline: auto;
  width: 100%;
}

@media (max-width: 800px) {
  .chart-card,
  .chart-card--reverse {
    grid-template-columns: 1fr;
  }

  .chart-card--reverse .chart-card__visual,
  .chart-card--reverse .chart-card__body {
    order: unset;
  }
}

.chart-card__visual {
  background: #0d151b;
  border-radius: var(--radius);
  border: 1px solid rgba(79, 189, 190, 0.1);
  padding: 1rem;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chart-card__visual svg {
  width: 100%;
  height: auto;
  max-height: 240px;
}

.chart-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.chart-card .badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--navy);
  background: var(--primary);
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.usecase {
  margin-top: 1rem;
  padding: 1rem 1.15rem;
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.12);
  border-left: 3px solid var(--error);
  border-radius: 12px;
}

.usecase__title {
  display: block;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
}

.usecase p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  max-width: none;
}

.chart-accordion {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
  border: none;
  background: transparent;
  overflow: visible;
}

@media (max-width: 720px) {
  .chart-accordion {
    grid-template-columns: 1fr;
  }
}

.accordion-item {
  background: var(--surface);
  border: 1px solid rgba(79, 189, 190, 0.15);
  border-radius: var(--radius);
  overflow: hidden;
  align-self: start;
}

.accordion-item.is-open {
  grid-column: 1 / -1;
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  background: transparent;
  border: none;
  border-bottom: 1px solid transparent;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.accordion-trigger:hover {
  background: rgba(79, 189, 190, 0.06);
  color: var(--primary);
}

.accordion-trigger[aria-expanded="true"] {
  color: var(--primary);
  background: rgba(79, 189, 190, 0.08);
  border-bottom-color: rgba(79, 189, 190, 0.18);
}

.accordion-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  position: relative;
}

.accordion-icon::before,
.accordion-icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.accordion-icon::before {
  width: 12px;
  height: 2px;
  top: 8px;
  left: 3px;
}

.accordion-icon::after {
  width: 2px;
  height: 12px;
  top: 3px;
  left: 8px;
}

.accordion-trigger[aria-expanded="true"] .accordion-icon::after {
  opacity: 0;
  transform: scaleY(0);
}

.accordion-panel {
  padding: 1.35rem 1.35rem 1.5rem;
}

.accordion-panel[hidden] {
  display: none;
}

.accordion-panel p {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 62ch;
}

.accordion-panel .usecase {
  margin-top: 0.25rem;
  margin-bottom: 1.15rem;
}

.accordion-panel .usecase p {
  margin: 0;
  max-width: none;
}

.accordion-chart {
  background: #0d151b;
  border: 1px solid rgba(79, 189, 190, 0.12);
  border-radius: 12px;
  padding: 0.65rem;
  max-width: 560px;
}

.accordion-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

/* —— Pricing —— */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

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

.plan {
  background: var(--surface);
  border: 1px solid rgba(79, 189, 190, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
}

.plan--pro {
  border-color: rgba(79, 189, 190, 0.45);
  box-shadow: var(--glow);
  position: relative;
}

.plan__label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.4rem;
}

.plan h3 {
  font-size: 1.6rem;
  margin-bottom: 0.35rem;
}

.plan__note {
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.plan ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  flex: 1;
}

.plan li {
  position: relative;
  padding: 0.45rem 0 0.45rem 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  border-bottom: 1px solid rgba(154, 168, 180, 0.08);
}

.plan li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
}

.pricing-footnote {
  text-align: center;
  font-size: 0.95rem;
  max-width: 42ch;
  margin-inline: auto;
}

/* —— Refund —— */
.refund-panel {
  background: var(--surface);
  border: 1px solid rgba(79, 189, 190, 0.2);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  max-width: 640px;
}

.refund-panel ol {
  margin: 0 0 1.5rem;
  padding-left: 1.25rem;
  color: var(--text-secondary);
}

.refund-panel li {
  margin-bottom: 0.5rem;
}

.refund-email {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--primary);
  word-break: break-all;
}

/* —— Legal pages —— */
.legal-page {
  padding: 3rem 0 5rem;
}

.legal-page h1 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin-bottom: 0.35rem;
}

.legal-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.legal-page h2 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 0.6rem;
}

.legal-page ul {
  color: var(--text-secondary);
  padding-left: 1.25rem;
}

.legal-page li {
  margin-bottom: 0.4rem;
}

/* —— Footer —— */
.site-footer {
  border-top: 1px solid rgba(79, 189, 190, 0.12);
  padding: 2.5rem 0 2rem;
  background: #0d151b;
}

.site-footer__grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text);
}

.site-footer__brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.site-footer__links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.site-footer__links a:hover {
  color: var(--primary);
}

.site-footer__copy {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
}

/* —— Reveal motion —— */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn,
  .nav__cta {
    transition: none;
  }
}