/* ==========================================================================
   KinesioCal marketing site — static, GitHub Pages.
   Same brand system as the app (design-bible): light-mode default with a
   user dark toggle, navy→teal primary gradient, Leaf Green accent.
   ========================================================================== */

:root {
  --prime-grey: #1A202C;
  --mid-grey: #718096;
  --subtle-grey: #F7FAFC;
  --white: #ffffff;
  --leaf: #03840E;
  --light-green: rgb(124, 227, 137);

  --bg-page: var(--subtle-grey);
  --bg-card: var(--white);
  --text-primary: var(--prime-grey);
  --text-secondary: var(--mid-grey);
  --border-subtle: #E2E8F0;
  --accent: var(--leaf);
  --hero-gradient: linear-gradient(135deg, rgb(3, 25, 106) 0%, rgb(0, 175, 143) 45%, rgb(0, 175, 143) 60%, rgb(247, 250, 252) 140%);
  --light-btn-gradient: linear-gradient(135deg, rgb(3, 132, 14), rgb(124, 227, 137));
  --light-btn-gradient-hover: linear-gradient(135deg, rgb(124, 227, 137), rgb(3, 132, 14));
  --dark-btn-gradient: linear-gradient(135deg, rgb(0, 0, 0), rgb(43, 43, 43));
  --dark-btn-gradient-hover: linear-gradient(135deg, rgb(43, 43, 43), rgb(0, 0, 0));
}

:root[data-theme="dark"] {
  --bg-page: #1A202C;
  --bg-card: #2D3748;
  --text-primary: #ffffff;
  --text-secondary: #A0AEC0;
  --border-subtle: rgba(255, 255, 255, 0.12);
  --accent: var(--light-green);
  --hero-gradient: linear-gradient(135deg, rgb(3, 25, 106) 0%, rgb(0, 175, 143) 45%, rgb(0, 130, 106) 75%, rgb(26, 32, 44) 130%);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

h1, h2, h3 { line-height: 1.2; }

/* ------------------------------- buttons -------------------------------- */

.button {
  display: inline-block;
  padding: 0.65rem 1.4rem;
  border: none;
  border-radius: 10px;
  background: var(--light-btn-gradient);
  color: #000;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: box-shadow 0.15s ease;
}

.button:hover {
  background: var(--light-btn-gradient-hover);
  box-shadow: 0 4px 14px rgb(3 132 14 / 0.3);
}

.button.dark {
  background: var(--dark-btn-gradient);
  color: var(--white);
}

.button.dark:hover {
  background: var(--dark-btn-gradient-hover);
  box-shadow: 0 4px 14px rgb(0 0 0 / 0.3);
}

:root[data-theme="dark"] .button.dark {
  background: transparent;
  border: 2px solid var(--white);
  color: var(--white);
  padding: calc(0.65rem - 2px) calc(1.4rem - 2px);
}

.button.small { padding: 0.45rem 1rem; font-size: 0.9rem; }
:root[data-theme="dark"] .button.dark.small { padding: calc(0.45rem - 2px) calc(1rem - 2px); }

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

.gradient-bar {
  height: 5px;
  background: linear-gradient(90deg, rgb(3, 25, 106), rgb(0, 175, 143), rgb(124, 227, 137));
}

.mkt-nav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  padding: 0.8rem 1.5rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 40;
  flex-wrap: wrap;
}

.brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand .brand-cal { color: rgb(0, 175, 143); }

.mkt-links {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
}

.mkt-links a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

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

.spacer { flex: 1; }

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  color: var(--text-primary);
  padding: 0.4rem 0.55rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
}

.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

.theme-toggle .icon { width: 1.15rem; height: 1.15rem; }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* --------------------------------- hero --------------------------------- */

.mkt-hero {
  background: var(--hero-gradient);
  color: var(--white);
  text-align: center;
  padding: 4.5rem 1.5rem 4rem;
}

.mkt-hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  line-height: 1.15;
  max-width: 820px;
  margin: 0 auto 0.9rem;
  text-shadow: 0 1px 3px rgb(3 25 106 / 0.4);
}

.mkt-hero-small { padding: 3rem 1.5rem 2.5rem; }

.mkt-tagline {
  font-size: 1.15rem;
  opacity: 0.94;
  max-width: 660px;
  margin: 0 auto 1.75rem;
  line-height: 1.55;
}

.mkt-hero-cta {
  display: flex;
  gap: 0.9rem;
  justify-content: center;
  flex-wrap: wrap;
}

.mkt-hero .helper {
  color: rgb(255 255 255 / 0.85);
  font-size: 0.9rem;
  margin-top: 1rem;
}

/* ------------------------------- sections ------------------------------- */

.mkt-section {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2.75rem;
}

.mkt-section-title {
  text-align: center;
  margin: 0;
  font-size: 1.7rem;
}

.mkt-section-sub {
  text-align: center;
  color: var(--text-secondary);
  max-width: 640px;
  margin: -1.75rem auto 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
}

.mkt-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.25rem;
}

.mkt-card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.75rem 1.5rem;
  box-shadow: 0 4px 20px rgb(26 32 44 / 0.06);
}

.mkt-card:hover { border-color: var(--accent); }

.mkt-card h3 { margin: 0; font-size: 1.1rem; }

.mkt-card p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.55;
}

.mkt-card .button { margin-top: auto; align-self: flex-start; }

.mkt-card-icon {
  display: inline-flex;
  width: 2.6rem;
  height: 2.6rem;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgb(0 175 143 / 0.12);
  color: rgb(0, 150, 122);
}

:root[data-theme="dark"] .mkt-card-icon {
  background: rgb(0 175 143 / 0.2);
  color: var(--light-green);
}

.mkt-card-icon svg { width: 1.5rem; height: 1.5rem; }

.mkt-center { text-align: center; }

/* Alternating feature rows. */
.mkt-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.mkt-feature.flip .mkt-feature-text { order: 2; }

.mkt-feature-text h2 { margin: 0.55rem 0 0.25rem; font-size: 1.35rem; }

.mkt-feature-text p {
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0.4rem 0 0;
}

.mkt-why { color: var(--accent); font-weight: 700; }

.mkt-img-ph {
  border: 2px dashed var(--border-subtle);
  border-radius: 16px;
  min-height: 230px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-align: center;
  padding: 1rem;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.mkt-img-ph svg { width: 2.6rem; height: 2.6rem; opacity: 0.55; }

.mkt-cta {
  text-align: center;
  padding: 2.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.mkt-cta h2, .mkt-cta p { margin: 0; }
.mkt-cta p { color: var(--text-secondary); }

/* -------------------------------- footer -------------------------------- */

.mkt-footer {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding: 2rem 1.5rem 1.5rem;
  background: var(--bg-card);
  border-top: 1px solid var(--border-subtle);
}

.mkt-footer p { margin: 0.25rem 0 0; color: var(--text-secondary); font-size: 0.9rem; }

.mkt-footer .legal-line {
  width: 100%;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.mkt-footer .legal-line a { color: var(--text-secondary); }

/* ----------------------------- legal pages ------------------------------ */

.legal {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3.5rem;
}

.legal h1 { font-size: 1.9rem; margin: 0 0 0.25rem; }

.legal .effective {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0 0 2rem;
}

.legal h2 { font-size: 1.25rem; margin: 2.25rem 0 0.5rem; }

.legal p, .legal li { line-height: 1.65; color: var(--text-primary); }

.legal ul { padding-left: 1.4rem; }

.legal .toc {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.1rem 1.4rem;
  margin: 0 0 1rem;
}

.legal .toc ul { margin: 0.4rem 0 0; }

/* ------------------------------ responsive ------------------------------ */

@media (max-width: 720px) {
  .mkt-feature { grid-template-columns: 1fr; gap: 1.25rem; }
  .mkt-feature.flip .mkt-feature-text { order: 0; }
  .mkt-hero { padding: 3rem 1rem 2.5rem; }
  .mkt-section { padding: 2rem 1rem; gap: 2rem; }
}