/**
 * StressBalance Landing — Family CI (StressBalance × Brain-Resonance)
 * Master tokens from Design System · IBM Plex · warm parchment
 * Header / hero / section / footer patterns match brain-resonance preview.
 */

:root {
  --color-brand-blue: #275f8f;
  --color-brand-blue-hover: #1f5080;
  --color-stress-red: #c72927;
  --color-regulation-green: #4fa754;
  --color-resonance-gold: #d39c0c;
  --color-gold-deep: #c08a10;
  --color-gold-muted: #946d08;

  --surface-page: #efe9dd;
  --surface-card: #fdf9f1;
  --surface-soft: #fdf8ee;
  --surface-white: #ffffff;
  --surface-muted: #f3ede1;
  --surface-blue-soft: #e9f0f6;
  --surface-green-soft: #eef5ea;
  --surface-gold-soft: #faf3e0;
  --surface-red-soft: #f8ece9;

  --text-primary: #33291c;
  --text-secondary: #6e6353;
  --text-muted: #9c8f77;
  --border-default: #e6d9c3;
  --border-card: #eadfca;
  --border-gold: #ecd9a8;

  --radius-control: 10px;
  --radius-btn: 11px;
  --radius-card: 18px;
  --radius-card-lg: 22px;
  --radius-pill: 999px;

  --shadow-card: 0 3px 10px rgba(51, 41, 28, 0.05);
  --shadow-float: 0 10px 26px rgba(51, 41, 28, 0.16);
  --shadow-cta: 0 6px 16px rgba(39, 95, 143, 0.25);

  --maxw: 1180px;
  --pad: clamp(20px, 4vw, 32px);
  --header-h: 76px;
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.2, 0, 0, 1);
  --motion: 220ms;
  --focus-ring: 0 0 0 2px #9ec1dd;

  /* Bridge to existing component CSS */
  --navy: var(--color-brand-blue);
  --navy-2: var(--color-brand-blue);
  --gold: var(--color-resonance-gold);
  --bg: var(--surface-page);
  --ink: var(--text-primary);
  --muted: var(--text-secondary);
  --card: var(--surface-card);
  --line: var(--border-default);
  --shadow: var(--shadow-card);
  --radius: var(--radius-card);
  --stress: var(--color-stress-red);
  --stress-soft: var(--surface-red-soft);
  --vagus: var(--color-brand-blue);
  --vagus-soft: var(--surface-blue-soft);
  --pulse: #8b3db8;
  --pulse-soft: #f3e8fa;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--surface-page);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
  min-height: 100dvh;
  overflow-x: clip;
}

a {
  color: var(--color-brand-blue);
  text-decoration: none;
}
a:hover {
  color: var(--color-brand-blue-hover);
}
a:focus-visible,
button:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

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

.sb-page {
  min-height: 100vh;
  background: var(--surface-page);
  overflow-x: clip;
  width: 100%;
}

/* —— Header —— */
.sb-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface-soft);
  border-bottom: 1px solid var(--border-default);
}

.sb-header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 14px var(--pad);
  max-width: var(--maxw);
  margin: 0 auto;
}

.sb-logo {
  height: 52px;
  width: auto;
  flex-shrink: 0;
}

.sb-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 22px;
  margin-left: auto;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.sb-nav a {
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  padding-bottom: 3px;
  line-height: 1;
}
.sb-nav a:hover,
.sb-nav a.is-active {
  color: var(--color-brand-blue);
  border-bottom-color: var(--color-resonance-gold);
}

.sb-header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* —— Buttons —— */
.sb-btn,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-btn);
  padding: 13px 18px;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition: background var(--motion) var(--ease), color var(--motion) var(--ease),
    border-color var(--motion) var(--ease);
  min-height: 44px;
}

.sb-btn--primary,
.btn-primary {
  background: var(--color-brand-blue);
  color: #fff !important;
  box-shadow: var(--shadow-cta);
  border: none;
}
.sb-btn--primary:hover,
.btn-primary:hover {
  background: var(--color-brand-blue-hover);
  color: #fff !important;
}

.sb-btn--ghost,
.btn-secondary {
  background: var(--surface-white);
  border: 1px solid var(--border-default);
  color: var(--color-brand-blue) !important;
  box-shadow: var(--shadow-card);
}
.sb-btn--ghost:hover,
.btn-secondary:hover {
  border-color: var(--color-brand-blue);
}

.btn-gold {
  background: var(--color-resonance-gold);
  color: #2a2418 !important;
  box-shadow: 0 6px 16px rgba(211, 156, 12, 0.28);
}
.btn-gold:hover {
  background: var(--color-gold-deep);
}

.sb-btn--sm {
  padding: 11px 20px;
  font-size: 13.5px;
  border-radius: 10px;
}

.sb-btn.is-disabled,
.sb-btn[aria-disabled="true"] {
  background: #a9c0d3 !important;
  color: #fff !important;
  box-shadow: none !important;
  cursor: not-allowed;
  pointer-events: none;
  opacity: 0.85;
}

.sb-btn-row,
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* —— Eyebrow / titles —— */
.sb-eyebrow,
.kicker {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gold-deep);
  overflow-wrap: anywhere;
  word-break: break-word;
  max-width: 100%;
}

.sb-rule {
  width: 38px;
  height: 3px;
  background: var(--color-resonance-gold);
  border-radius: 2px;
  margin: 10px 0 12px;
}
.sb-rule--left {
  margin-left: 0;
  margin-right: auto;
}
.sb-rule--center {
  margin-left: auto;
  margin-right: auto;
}

.sb-h1 {
  margin: 0;
  font-size: clamp(28px, 7.2vw, 48px);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  overflow-wrap: anywhere;
  word-break: break-word;
  max-width: 100%;
}

.sb-h2,
.sb-section h2,
.section h2 {
  margin: 0;
  font-size: clamp(28px, 3.4vw, 36px);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.18;
  color: var(--text-primary);
}

.sb-lead,
.lead,
.section > .sub {
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--text-secondary);
  margin: 16px 0 0;
  max-width: 560px;
}

.sb-check-list {
  display: flex;
  flex-direction: column;
  gap: 11px;
  margin-top: 22px;
  padding: 0;
  list-style: none;
}
.sb-check-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text-primary);
}
.sb-check {
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--color-regulation-green);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.sb-check svg {
  display: block;
}

/* —— Hero —— */
.sb-hero {
  position: relative;
  background: var(--surface-page);
}

.sb-hero-grid {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 72px var(--pad) 64px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.sb-hero-grid > * {
  min-width: 0;
  max-width: 100%;
}

.sb-hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.sb-hero-logo {
  width: min(340px, 100%);
  height: auto;
}

/* —— Sections —— */
.sb-section,
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 64px var(--pad);
  scroll-margin-top: 90px;
}

.sb-section + .sb-section,
.section + .section {
  border-top: 1px solid var(--border-default);
}

.sb-section--white {
  background: var(--surface-white);
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}
.sb-section--white > .sb-section-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 64px var(--pad);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 22px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 22px;
}

.card {
  background: var(--surface-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 22px 24px 24px;
  box-shadow: var(--shadow-card);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
}

.card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14.5px;
  line-height: 1.6;
}

/* —— Footer —— */
.sb-footer {
  background: var(--surface-page);
  border-top: 1px solid var(--border-default);
}

.sb-footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 48px var(--pad);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.sb-footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.sb-footer-brand img {
  height: 72px;
  width: auto;
}

.sb-footer-brand strong {
  font-size: 15px;
  display: block;
}

.sb-footer-brand span {
  font-size: 12px;
  color: var(--text-muted);
}

.sb-footer-links {
  display: flex;
  gap: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}
.sb-footer-links a {
  color: inherit;
  cursor: pointer;
}

.sb-footer-note {
  width: 100%;
  font-size: 12.5px;
  color: var(--text-muted);
  margin: 0;
}

/* Lang switch — restyle existing markup */
.lang-switch {
  position: relative;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid #d4d8dc;
  border-radius: 8px;
  padding: 6px 12px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--surface-white);
  cursor: pointer;
  min-height: 40px;
}

.lang-btn .code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  font-weight: 600;
  color: var(--text-primary);
}

.lang-menu {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  min-width: 168px;
  max-height: 320px;
  overflow: auto;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 12px;
  box-shadow: var(--shadow-float);
  z-index: 200;
}

.lang-switch.open .lang-menu {
  display: block;
}

.lang-option {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 13px;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  text-align: left;
  color: var(--text-primary);
}

.lang-option:hover,
.lang-option[aria-selected="true"] {
  background: var(--surface-muted);
}

/* Contact / legal inherit family surfaces */
.contact-form label {
  color: var(--text-primary);
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form input[type="tel"],
.contact-form input[type="number"],
.contact-form select,
.contact-form textarea {
  border-color: var(--border-card);
  border-radius: var(--radius-control);
}

.legal-dialog {
  background: var(--surface-card);
  border-color: var(--border-card);
}

.legal-dialog-title,
.legal-content h2,
.legal-content h3 {
  color: var(--text-primary);
}

.banner {
  background: var(--surface-card);
  color: var(--text-primary);
  border: 1px solid var(--border-card);
  border-left: 4px solid var(--color-resonance-gold);
  border-radius: var(--radius-card-lg);
  box-shadow: var(--shadow-card);
}

.banner h2 {
  color: var(--text-primary);
}

.banner p {
  color: var(--text-secondary);
  opacity: 1;
}

.banner .btn-secondary {
  border-color: var(--border-default);
  background: var(--surface-white);
  color: var(--color-brand-blue) !important;
}

.metric.pulse {
  background: linear-gradient(180deg, var(--pulse-soft) 0%, var(--surface-card) 48%);
}
.metric.stress {
  background: linear-gradient(180deg, var(--stress-soft) 0%, var(--surface-card) 48%);
}
.metric.balance {
  background: linear-gradient(180deg, var(--vagus-soft) 0%, var(--surface-card) 48%);
}

.strap-primary {
  background: linear-gradient(180deg, var(--surface-blue-soft) 0%, var(--surface-card) 48%);
  border-color: var(--border-card);
}

.strap-badge {
  background: var(--color-brand-blue);
}

.hrv-std-card {
  background: linear-gradient(90deg, var(--surface-blue-soft) 0%, var(--surface-card) 55%);
  border-left-color: var(--color-brand-blue);
}

.price-card .note {
  color: var(--color-gold-muted);
  background: var(--surface-gold-soft);
}

/* Responsive */
@media (max-width: 1080px) {
  .sb-hero-grid {
    grid-template-columns: 1fr;
  }
  .sb-hero-visual {
    order: -1;
  }
  .sb-hero-logo {
    width: min(240px, 70vw);
  }
  .grid-3 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .sb-header-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "logo actions"
      "nav nav";
    align-items: center;
    gap: 10px 12px;
    padding: 12px 16px;
  }
  .sb-header-inner > a {
    grid-area: logo;
    min-width: 0;
  }
  .sb-nav {
    grid-area: nav;
    order: unset;
    width: 100%;
    margin-left: 0;
    gap: 10px 14px;
  }
  .sb-logo {
    height: 36px;
    width: auto;
    max-width: 150px;
    flex-shrink: 0;
  }
  .sb-header-actions {
    grid-area: actions;
    gap: 8px;
    margin-left: 0;
  }
  .sb-eyebrow,
  .kicker {
    letter-spacing: 0.06em;
    font-size: 11.5px;
  }
  .sb-btn,
  .btn {
    white-space: normal;
    text-align: center;
  }
  .sb-hero-grid,
  .sb-section,
  .section {
    padding-top: 40px;
    padding-bottom: 40px;
  }
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .sb-header-actions .nav-course {
    display: none;
  }
}

@media (max-width: 480px) {
  .sb-h1 {
    font-size: 1.7rem;
  }
}