/* ------------------------------------------------------------------
   Crystal Payoff — shared styles
------------------------------------------------------------------ */

:root {
  --color-primary: #1B4F72;
  --color-primary-hover: #163E5C;
  --color-accent: #27AE60;
  --color-bg: #FAFAFA;
  --color-bg-alt: #F8FAFC;
  --color-surface: #FFFFFF;
  --color-text: #1A1A2E;
  --color-text-muted: #6B7280;
  --color-border: #E5E7EB;

  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1100px;
  --section-padding: 80px;
  --section-padding-mobile: 48px;

  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.04);
  --shadow-md: 0 4px 12px rgba(16, 24, 40, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: 'DM Serif Display', Georgia, serif;
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.2;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}

h1 { font-size: 56px; }
h2 { font-size: 40px; margin-bottom: 24px; }
h3 { font-size: 24px; font-family: 'Inter', sans-serif; font-weight: 600; }
h4 { font-family: 'Inter', sans-serif; font-weight: 600; font-size: 18px; }

p {
  margin: 0 0 16px;
  color: var(--color-text);
}

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

a:hover {
  text-decoration: underline;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

.section--alt {
  background-color: var(--color-bg-alt);
}

.text-muted {
  color: var(--color-text-muted);
}

.text-small {
  font-size: 14px;
}

/* ------------------------------------------------------------------
   Navigation
------------------------------------------------------------------ */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-surface);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.nav.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 22px;
  color: var(--color-primary);
}

.nav__logo:hover {
  text-decoration: none;
}

.nav__logo-mark {
  width: 28px;
  height: 28px;
  display: inline-block;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__links a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 15px;
}

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

.nav__links a.btn--primary,
.nav__links a.btn--primary:hover {
  color: #fff;
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  width: 40px;
  height: 40px;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  margin: 5px auto;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ------------------------------------------------------------------
   Buttons
------------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.05s ease;
  border: none;
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-primary);
  color: #fff;
}

.btn--primary:hover {
  background-color: var(--color-primary-hover);
  text-decoration: none;
  color: #fff;
}

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

.btn--nav {
  height: 40px;
  padding: 0 18px;
  font-size: 14px;
}

/* ------------------------------------------------------------------
   Hero
------------------------------------------------------------------ */

.hero {
  padding: 96px 0 80px;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--color-bg) 100%);
}

.hero__content {
  max-width: 760px;
}

.hero h1 {
  margin-bottom: 20px;
}

.hero__sub {
  font-size: 20px;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  line-height: 1.5;
}

.hero__cta-row {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.hero__trust {
  font-size: 14px;
  color: var(--color-text-muted);
}

.hero__trust strong {
  color: var(--color-text);
  font-weight: 600;
}

/* ------------------------------------------------------------------
   Steps
------------------------------------------------------------------ */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.step {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}

.step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 16px;
}

.step h3 {
  margin-bottom: 8px;
}

.step p {
  color: var(--color-text-muted);
  margin: 0;
  font-size: 15px;
}

/* ------------------------------------------------------------------
   Avalanche explanation
------------------------------------------------------------------ */

.avalanche {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.avalanche__copy h2 {
  margin-bottom: 16px;
}

.comparison {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.comparison__title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.comparison__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.comparison__row:last-of-type {
  border-bottom: none;
}

.comparison__label {
  font-size: 15px;
  color: var(--color-text-muted);
}

.comparison__value {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

.comparison__value--accent {
  color: var(--color-accent);
}

.comparison__savings {
  margin-top: 16px;
  padding: 16px;
  background-color: #ECFDF5;
  border-radius: var(--radius-sm);
  text-align: center;
}

.comparison__savings strong {
  display: block;
  font-size: 28px;
  font-family: 'DM Serif Display', Georgia, serif;
  font-weight: 400;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.comparison__savings span {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ------------------------------------------------------------------
   Tool preview
------------------------------------------------------------------ */

.preview__intro {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.preview-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.preview-card__header {
  padding: 20px 28px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--color-bg-alt);
}

.preview-card__title {
  font-weight: 600;
  font-size: 16px;
}

.preview-card__badge {
  font-size: 12px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.preview-card__body {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 0;
}

.preview-card__inputs {
  padding: 28px;
  border-right: 1px solid var(--color-border);
}

.preview-card__results {
  padding: 28px;
  background-color: #FBFCFD;
}

.preview-field {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.preview-input {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 14px;
  color: var(--color-text);
}

.preview-input--label {
  font-weight: 500;
}

.preview-input--muted {
  color: var(--color-text-muted);
}

.preview-add {
  display: inline-block;
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 500;
}

.preview-result-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}

.preview-result-row:last-of-type {
  border-bottom: none;
}

.preview-result-row strong {
  color: var(--color-text);
  font-weight: 600;
}

.preview-progress {
  margin-top: 20px;
}

.preview-progress__label {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.preview-progress__bar {
  height: 8px;
  background-color: var(--color-border);
  border-radius: 999px;
  overflow: hidden;
}

.preview-progress__fill {
  height: 100%;
  width: 38%;
  background-color: var(--color-accent);
  border-radius: 999px;
}

.preview-caption {
  text-align: center;
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ------------------------------------------------------------------
   Testimonials
------------------------------------------------------------------ */

.testimonials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.testimonial {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
}

.testimonial__quote-mark {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 56px;
  line-height: 1;
  color: var(--color-accent);
  margin-bottom: 8px;
  height: 32px;
}

.testimonial__quote {
  font-style: italic;
  color: var(--color-text);
  margin-bottom: 20px;
  font-size: 15px;
}

.testimonial__name {
  font-weight: 600;
  font-size: 14px;
  color: var(--color-text);
}

.testimonial__meta {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ------------------------------------------------------------------
   Footer
------------------------------------------------------------------ */

.footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 48px 0 32px;
}

.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.footer__brand {
  max-width: 320px;
}

.footer__brand-name {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 20px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.footer__tagline {
  font-size: 14px;
  color: var(--color-text-muted);
  margin: 0;
}

.footer__links {
  display: flex;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.footer__links a {
  color: var(--color-text-muted);
  font-size: 14px;
}

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--color-text-muted);
}

.footer__disclosure {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ------------------------------------------------------------------
   Content pages (about, privacy, disclosure)
------------------------------------------------------------------ */

.page-header {
  padding: 80px 0 32px;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  font-size: 44px;
  margin: 0;
}

.page-header__sub {
  margin-top: 12px;
  color: var(--color-text-muted);
  font-size: 16px;
}

.content {
  padding: 56px 0 96px;
}

.content__inner {
  max-width: 720px;
}

.content h2 {
  font-size: 28px;
  margin-top: 40px;
}

.content h3 {
  font-size: 20px;
  margin-top: 32px;
}

.content ul, .content ol {
  padding-left: 22px;
  margin: 0 0 16px;
}

.content li {
  margin-bottom: 8px;
}

.placeholder-note {
  background-color: #FEF3C7;
  border: 1px solid #FCD34D;
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 0 0 32px;
  font-size: 14px;
  color: #78350F;
}

.placeholder-note strong {
  display: block;
  margin-bottom: 4px;
}

.in-short {
  background-color: var(--color-bg-alt);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin: 0 0 16px;
  font-size: 15px;
  color: var(--color-text-muted);
}

.in-short strong {
  color: var(--color-text);
}

.toc {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 28px;
  margin: 0 0 32px;
}

.toc ol {
  margin: 0;
  padding-left: 22px;
}

.toc li {
  margin-bottom: 6px;
  font-size: 15px;
}

.content table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: 14px;
  border: 1px solid var(--color-border);
}

.content table th,
.content table td {
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.content table thead th {
  background-color: var(--color-bg-alt);
  font-weight: 600;
  color: var(--color-text);
}

.content table td.collected {
  text-align: center;
  font-weight: 600;
  white-space: nowrap;
}

.table-wrap {
  overflow-x: auto;
  margin: 16px 0 24px;
}

.table-wrap table {
  margin: 0;
}

/* ------------------------------------------------------------------
   Responsive
------------------------------------------------------------------ */

@media (max-width: 860px) {
  h1 { font-size: 40px; }
  h2 { font-size: 30px; }

  .section { padding: var(--section-padding-mobile) 0; }
  .hero { padding: 56px 0 48px; }
  .page-header { padding: 48px 0 24px; }
  .page-header h1 { font-size: 34px; }

  .nav__links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 24px 16px;
    box-shadow: var(--shadow-md);
  }

  .nav__links.is-open {
    display: flex;
  }

  .nav__links li {
    border-bottom: 1px solid var(--color-border);
  }

  .nav__links li:last-child {
    border-bottom: none;
    margin-top: 12px;
  }

  .nav__links a {
    display: block;
    padding: 14px 0;
  }

  .nav__links .btn {
    width: 100%;
  }

  .nav__toggle {
    display: block;
  }

  .steps,
  .testimonials {
    grid-template-columns: 1fr;
  }

  .avalanche {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .preview-card__body {
    grid-template-columns: 1fr;
  }

  .preview-card__inputs {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .preview-field {
    grid-template-columns: 1fr 1fr;
  }

  .preview-field .preview-input--label {
    grid-column: 1 / -1;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}