/* ============================================
   OtterDrift Design System
   A calm, fluid, premium experience
   ============================================ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background-color: var(--color-background);
  line-height: 1.6;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol { list-style: none; }

/* ---------- Design Tokens ---------- */
:root {
  /* Colors */
  --color-primary: #0B1D35;
  --color-secondary: #1B4965;
  --color-accent: #5FA8D3;
  --color-accent-soft: #8FC4E2;
  --color-warm: #CAE9FF;
  --color-highlight: #62B6CB;
  --color-surface: #FFFFFF;
  --color-background: #F7F9FC;
  --color-background-warm: #F0F4F8;
  --color-text: #0B1D35;
  --color-text-secondary: #5A6B7B;
  --color-text-light: #8B9CAD;
  --color-border: #E2E8F0;
  --color-border-light: #EDF2F7;
  --color-amber: #E8985E;
  --color-success: #48BB78;
  --color-hero-start: #0B1D35;
  --color-hero-mid: #1B4965;
  --color-hero-end: #2A6F97;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;

  /* Spacing */
  --space-2xs: 0.125rem;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Borders */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(11, 29, 53, 0.03);
  --shadow-sm: 0 1px 3px rgba(11, 29, 53, 0.04), 0 1px 2px rgba(11, 29, 53, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(11, 29, 53, 0.05), 0 2px 4px -1px rgba(11, 29, 53, 0.03);
  --shadow-lg: 0 10px 25px -3px rgba(11, 29, 53, 0.06), 0 4px 10px -2px rgba(11, 29, 53, 0.03);
  --shadow-xl: 0 20px 40px -5px rgba(11, 29, 53, 0.08), 0 8px 16px -4px rgba(11, 29, 53, 0.03);
  --shadow-2xl: 0 25px 60px -12px rgba(11, 29, 53, 0.12);
  --shadow-card: 0 0 0 1px rgba(11, 29, 53, 0.04), 0 4px 16px rgba(11, 29, 53, 0.06);
  --shadow-card-hover: 0 0 0 1px rgba(95, 168, 211, 0.2), 0 8px 32px rgba(11, 29, 53, 0.1);
  --shadow-selected: 0 0 0 2px var(--color-accent), 0 8px 32px rgba(95, 168, 211, 0.15);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-base: 300ms var(--ease-out);
  --transition-slow: 500ms var(--ease-out);
  --transition-smooth: 700ms var(--ease-out);

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;
  --container-wide: 1400px;
  --nav-height: 72px;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.text-display {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.text-headline {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.text-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.2;
}

.text-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  font-weight: 500;
  line-height: 1.4;
}

.text-body {
  font-size: 1rem;
  line-height: 1.6;
}

.text-body-lg {
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.6;
}

.text-caption {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.text-overline {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* ---------- Layout ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.container--wide {
  max-width: var(--container-wide);
}

.section {
  padding: var(--space-5xl) 0;
}

.section--compact {
  padding: var(--space-3xl) 0;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: background var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base);
}

.nav--scrolled {
  background: rgba(247, 249, 252, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 rgba(11, 29, 53, 0.06);
}

.nav--dark {
  background: transparent;
}

.nav--dark.nav--scrolled {
  background: rgba(11, 29, 53, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

.nav__inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.nav--dark .nav__logo {
  color: var(--color-surface);
}

.nav__logo svg {
  width: 32px;
  height: 32px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
}

.nav__link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
  transition: width var(--transition-base);
}

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

.nav__link:hover::after {
  width: 100%;
}

.nav--dark .nav__link {
  color: rgba(255, 255, 255, 0.7);
}

.nav--dark .nav__link:hover {
  color: rgba(255, 255, 255, 1);
}

.nav__cta {
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: var(--color-surface);
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav__cta:hover {
  background: var(--color-highlight);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(95, 168, 211, 0.3);
}

.nav__mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  padding: 2px 0;
}

.nav__mobile-toggle span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: var(--transition-base);
}

.nav--dark .nav__mobile-toggle span {
  background: var(--color-surface);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-surface);
  box-shadow: 0 2px 8px rgba(95, 168, 211, 0.25);
}

.btn--primary:hover {
  background: var(--color-highlight);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(95, 168, 211, 0.35);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-accent);
  padding: 0.875rem 1rem;
}

.btn--ghost:hover {
  background: rgba(95, 168, 211, 0.08);
}

.btn--large {
  font-size: 1.125rem;
  padding: 1rem 2.5rem;
}

.btn--dark {
  background: var(--color-primary);
  color: var(--color-surface);
}

.btn--dark:hover {
  background: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(11, 29, 53, 0.25);
}

.btn__icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
}

.btn:hover .btn__icon {
  transform: translateX(3px);
}

/* ---------- Homepage: Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-primary);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    var(--color-hero-start) 0%,
    var(--color-hero-mid) 40%,
    var(--color-hero-end) 70%,
    #3A7CA5 100%
  );
  background-size: 400% 400%;
  animation: heroGradient 20s ease infinite;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 100%, rgba(95, 168, 211, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 20%, rgba(98, 182, 203, 0.1) 0%, transparent 50%);
}

@keyframes heroGradient {
  0%, 100% { background-position: 0% 50%; }
  25% { background-position: 50% 100%; }
  50% { background-position: 100% 50%; }
  75% { background-position: 50% 0%; }
}

.hero__waves {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  overflow: hidden;
}

.hero__wave {
  position: absolute;
  bottom: 0;
  left: -5%;
  width: 110%;
  height: 100%;
  opacity: 0.08;
}

.hero__wave path {
  fill: var(--color-surface);
}

.hero__wave--1 { animation: waveFloat 8s ease-in-out infinite; }
.hero__wave--2 { animation: waveFloat 10s ease-in-out infinite reverse; opacity: 0.05; bottom: -20px; }
.hero__wave--3 { animation: waveFloat 12s ease-in-out infinite; opacity: 0.03; bottom: -40px; }

@keyframes waveFloat {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(20px); }
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--space-5xl) var(--space-xl);
  max-width: 900px;
}

.hero__overline {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent-soft);
  margin-bottom: var(--space-xl);
  opacity: 0;
  animation: fadeUp 800ms var(--ease-out) 200ms forwards;
}

.hero__title {
  font-size: clamp(2.75rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--color-surface);
  margin-bottom: var(--space-xl);
  opacity: 0;
  animation: fadeUp 800ms var(--ease-out) 400ms forwards;
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--color-accent-soft), var(--color-warm));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1.0625rem, 2vw, 1.3125rem);
  font-weight: 400;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
  opacity: 0;
  animation: fadeUp 800ms var(--ease-out) 600ms forwards;
}

.hero__cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  opacity: 0;
  animation: fadeUp 800ms var(--ease-out) 800ms forwards;
}

.hero__cta {
  font-size: 1.0625rem;
  font-weight: 600;
  padding: 1rem 2.5rem;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-primary);
  transition: all var(--transition-base);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.hero__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.hero__cta--ghost {
  background: transparent;
  color: rgba(255, 255, 255, 0.9);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  box-shadow: none;
}

.hero__cta--ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
  box-shadow: none;
}

.hero__scroll-hint {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeIn 800ms var(--ease-out) 1200ms forwards;
}

.hero__scroll-hint svg {
  width: 20px;
  height: 20px;
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ---------- Homepage: Philosophy ---------- */
.philosophy {
  background: var(--color-surface);
}

.philosophy__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-4xl);
}

.philosophy__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2xl);
}

.philosophy__card {
  text-align: center;
  padding: var(--space-2xl) var(--space-xl);
}

.philosophy__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-warm), var(--color-background));
  color: var(--color-secondary);
}

.philosophy__icon svg {
  width: 28px;
  height: 28px;
}

.philosophy__card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.philosophy__card p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: 0.9375rem;
}

/* ---------- Homepage: How It Works ---------- */
.how-it-works {
  background: var(--color-background);
}

.how-it-works__header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-4xl);
}

.how-it-works__steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2xl);
  position: relative;
}

.how-it-works__steps::before {
  content: '';
  position: absolute;
  top: 48px;
  left: calc(16.67% + 24px);
  right: calc(16.67% + 24px);
  height: 2px;
  background: linear-gradient(90deg, var(--color-border), var(--color-accent), var(--color-border));
  opacity: 0.5;
}

.step {
  text-align: center;
  position: relative;
}

.step__number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
  font-size: 1.25rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-xl);
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-sm);
}

.step__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.step__desc {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
  max-width: 280px;
  margin: 0 auto;
}

/* ---------- Homepage: Experiences Preview ---------- */
.experiences {
  background: var(--color-surface);
}

.experiences__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-4xl);
}

.experiences__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.experience-preview {
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-xl);
  background: var(--color-background);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.experience-preview::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.experience-preview:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.experience-preview:hover::before {
  transform: scaleX(1);
}

.experience-preview__icon {
  font-size: 2rem;
  margin-bottom: var(--space-lg);
  display: block;
}

.experience-preview__name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.experience-preview__tagline {
  font-size: 0.8125rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.experience-preview__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ---------- Homepage: CTA Section ---------- */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 50%, var(--color-hero-end) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 100%, rgba(95, 168, 211, 0.12) 0%, transparent 60%);
}

.cta-section__content {
  position: relative;
  z-index: 1;
}

.cta-section__title {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 700;
  color: var(--color-surface);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.03em;
}

.cta-section__subtitle {
  font-size: clamp(1rem, 1.5vw, 1.1875rem);
  color: rgba(255, 255, 255, 0.7);
  max-width: 500px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.6;
}

/* ---------- Homepage: Reassurance ---------- */
.reassurance {
  background: var(--color-background);
}

.reassurance__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  text-align: center;
}

.reassurance__item {
  padding: var(--space-xl) var(--space-md);
}

.reassurance__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-md);
  color: var(--color-accent);
}

.reassurance__icon svg {
  width: 100%;
  height: 100%;
}

.reassurance__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.reassurance__desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.6);
  padding: var(--space-4xl) 0 var(--space-2xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-surface);
  margin-bottom: var(--space-lg);
}

.footer__logo svg {
  width: 28px;
  height: 28px;
}

.footer__brand p {
  font-size: 0.875rem;
  line-height: 1.7;
}

.footer__col h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: var(--space-lg);
}

.footer__col a {
  display: block;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.footer__col a:hover {
  color: var(--color-surface);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
}

.footer__bottom-links {
  display: flex;
  gap: var(--space-xl);
}

.footer__bottom-links a {
  transition: color var(--transition-fast);
}

.footer__bottom-links a:hover {
  color: var(--color-surface);
}

/* ============================================
   BUILD FLOW STYLES
   ============================================ */

/* ---------- Build: Layout ---------- */
.build-page {
  min-height: 100vh;
  background: var(--color-background);
}

.build-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(247, 249, 252, 0.9);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--color-border-light);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
}

.build-nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
}

.build-nav__logo svg {
  width: 28px;
  height: 28px;
}

.build-nav__progress {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.build-nav__step {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: color var(--transition-base);
}

.build-nav__step--active {
  color: var(--color-accent);
}

.build-nav__step--completed {
  color: var(--color-success);
}

.build-nav__step-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  transition: all var(--transition-base);
}

.build-nav__step--active .build-nav__step-dot {
  background: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(95, 168, 211, 0.2);
}

.build-nav__step--completed .build-nav__step-dot {
  background: var(--color-success);
}

.build-nav__separator {
  width: 32px;
  height: 1px;
  background: var(--color-border);
}

.build-nav__close {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.build-nav__close:hover {
  background: rgba(11, 29, 53, 0.05);
  color: var(--color-text);
}

/* ---------- Build: Steps Container ---------- */
.build-flow {
  padding-top: var(--nav-height);
  min-height: 100vh;
}

.build-step {
  display: none;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
  min-height: calc(100vh - var(--nav-height));
  padding: var(--space-3xl) 0;
}

.build-step--active {
  display: block;
}

.build-step--visible {
  opacity: 1;
  transform: translateY(0);
}

.build-step__header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto var(--space-3xl);
  padding: 0 var(--space-xl);
}

.build-step__overline {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.build-step__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.build-step__subtitle {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ---------- Build: Base Selection Cards ---------- */
.base-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.base-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-xl);
  border: 2px solid transparent;
  box-shadow: var(--shadow-card);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.base-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.base-card--explorer::before { background: linear-gradient(90deg, #5FA8D3, #62B6CB); }
.base-card--creator::before { background: linear-gradient(90deg, #8B5CF6, #A78BFA); }
.base-card--gather::before { background: linear-gradient(90deg, #E8985E, #F0B78A); }
.base-card--zen::before { background: linear-gradient(90deg, #48BB78, #9AE6B4); }

.base-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.base-card:hover::before {
  opacity: 1;
}

.base-card--selected {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-selected);
  transform: translateY(-2px);
}

.base-card--selected::before {
  opacity: 1;
}

.base-card__check {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.5);
  transition: all var(--transition-base);
}

.base-card--selected .base-card__check {
  opacity: 1;
  transform: scale(1);
}

.base-card__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-lg);
  display: block;
}

.base-card__name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.base-card__tagline {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.base-card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.base-card__price {
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.base-card__price strong {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
}

/* ---------- Build: Foundation Intro ---------- */
.foundation-intro {
  max-width: 580px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.foundation-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  padding: var(--space-3xl) var(--space-2xl);
  box-shadow: var(--shadow-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
  border: 2px solid var(--color-border-light);
}

.foundation-card__glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-highlight), var(--color-accent));
  background-size: 200% 100%;
  animation: glowShift 4s ease infinite;
}

@keyframes glowShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.foundation-card__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-warm), var(--color-background));
  color: var(--color-secondary);
}

.foundation-card__icon svg {
  width: 36px;
  height: 36px;
}

.foundation-card__name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.foundation-card__tagline {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: var(--space-xl);
}

.foundation-card__desc {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 440px;
  margin: 0 auto var(--space-2xl);
}

.foundation-card__features {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.foundation-feature {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
}

.foundation-feature svg {
  color: var(--color-success);
  flex-shrink: 0;
}


/* ---------- Build: Personalization Selections ---------- */
.personalization-section {
  max-width: var(--container-max);
  margin: 0 auto var(--space-3xl);
  padding: 0 var(--space-xl);
}

.personalization-section__header {
  margin-bottom: var(--space-xl);
}

.personalization-section__label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.personalization-section__title {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.personalization-section__desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.lifestyle-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
}

.lifestyle-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg);
  border: 2px solid transparent;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-base);
}

.lifestyle-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.lifestyle-card--selected {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-selected);
  background: linear-gradient(180deg, rgba(95, 168, 211, 0.04) 0%, var(--color-surface) 100%);
}

.lifestyle-card__icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
  display: block;
}

.lifestyle-card__name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.lifestyle-card__desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.enhancer-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
}

.enhancer-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg);
  border: 2px solid transparent;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
}

.enhancer-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.enhancer-card--selected {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-selected);
  background: linear-gradient(180deg, rgba(95, 168, 211, 0.04) 0%, var(--color-surface) 100%);
}

.enhancer-card__check {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
}

.enhancer-card--selected .enhancer-card__check {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-surface);
}

.enhancer-card__icon {
  font-size: 1.75rem;
  margin-bottom: var(--space-md);
  display: block;
}

.enhancer-card__name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.enhancer-card__desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.enhancer-card__price {
  margin-top: var(--space-md);
  font-size: 0.75rem;
  color: var(--color-text-light);
}

/* ---------- Build: Navigation Buttons ---------- */
.build-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  padding: var(--space-3xl) var(--space-xl) var(--space-2xl);
  max-width: var(--container-max);
  margin: 0 auto;
}

.build-actions .btn {
  min-width: 180px;
}

.build-hint {
  text-align: center;
  padding: var(--space-md) var(--space-xl);
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

/* ---------- Build: Summary ---------- */
.summary {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.summary__card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

.summary__hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 60%, var(--color-hero-end) 100%);
  padding: var(--space-3xl) var(--space-2xl);
  text-align: center;
  color: var(--color-surface);
  position: relative;
  overflow: hidden;
}

.summary__hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 40% at 70% 80%, rgba(95, 168, 211, 0.15) 0%, transparent 60%);
}

.summary__hero-content {
  position: relative;
  z-index: 1;
}

.summary__hero-overline {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent-soft);
  margin-bottom: var(--space-md);
}

.summary__hero-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: var(--space-md);
}

.summary__hero-narrative {
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.75);
  max-width: 500px;
  margin: 0 auto;
}

.summary__body {
  padding: var(--space-2xl);
}

.summary__section {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.summary__section:last-child {
  border-bottom: none;
}

.summary__section-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.summary__base {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.summary__base-icon {
  font-size: 1.5rem;
}

.summary__base-info h4 {
  font-size: 1rem;
  font-weight: 600;
}

.summary__base-info p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.summary__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.summary__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-full);
  background: var(--color-background);
  color: var(--color-text-secondary);
}

.summary__tag svg {
  width: 14px;
  height: 14px;
  color: var(--color-accent);
}

.summary__price-section {
  padding: var(--space-xl) 0;
  text-align: center;
}

.summary__price-label {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.summary__price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.summary__price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-secondary);
}

.summary__price-note {
  font-size: 0.75rem;
  color: var(--color-text-light);
  margin-top: var(--space-xs);
}

.summary__checkout {
  padding: 0 var(--space-2xl) var(--space-2xl);
}

.summary__checkout-btn {
  width: 100%;
  font-size: 1.0625rem;
  font-weight: 600;
  padding: 1rem;
  border-radius: var(--radius-lg);
  background: var(--color-accent);
  color: var(--color-surface);
  transition: all var(--transition-base);
  box-shadow: 0 4px 12px rgba(95, 168, 211, 0.3);
}

.summary__checkout-btn:hover {
  background: var(--color-highlight);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(95, 168, 211, 0.35);
}

.summary__reassurance {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  padding: var(--space-lg) var(--space-2xl) var(--space-xl);
}

.summary__reassurance-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.75rem;
  color: var(--color-text-light);
}

.summary__reassurance-item svg {
  width: 14px;
  height: 14px;
  color: var(--color-success);
}

/* ---------- Build: Checkout Form ---------- */
.checkout-form {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl);
}

.checkout-form__section {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--space-xl);
}

.checkout-form__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-xl);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.form-row--full {
  grid-template-columns: 1fr;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-group label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-group input,
.form-group select {
  height: 48px;
  padding: 0 var(--space-lg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(95, 168, 211, 0.12);
}

.form-group input::placeholder {
  color: var(--color-text-light);
}

/* ---------- Animations ---------- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}

.animate-on-scroll--visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-1 { transition-delay: 100ms; }
.stagger-2 { transition-delay: 200ms; }
.stagger-3 { transition-delay: 300ms; }
.stagger-4 { transition-delay: 400ms; }
.stagger-5 { transition-delay: 500ms; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .base-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .nav__links {
    display: none;
  }

  .nav__mobile-toggle {
    display: flex;
  }

  .hero__content {
    padding: var(--space-3xl) var(--space-lg);
  }

  .hero__cta-group {
    flex-direction: column;
    gap: var(--space-md);
  }

  .philosophy__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .how-it-works__steps {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .how-it-works__steps::before {
    display: none;
  }

  .experiences__grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

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

  .base-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .lifestyle-grid {
    grid-template-columns: 1fr 1fr;
  }

  .enhancer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .build-nav__progress {
    display: none;
  }

  .build-nav__step-text {
    display: none;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-lg);
    text-align: center;
  }

  .summary__reassurance {
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .lifestyle-grid {
    grid-template-columns: 1fr;
  }

  .enhancer-grid {
    grid-template-columns: 1fr;
  }

  .reassurance__grid {
    grid-template-columns: 1fr;
  }

  .summary__body {
    padding: var(--space-xl);
  }

  .summary__hero {
    padding: var(--space-2xl) var(--space-xl);
  }

  .summary__checkout {
    padding: 0 var(--space-xl) var(--space-xl);
  }
}

/* ---------- Utility ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-gradient {
  background: linear-gradient(135deg, var(--color-accent), var(--color-highlight));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}