/* ==========================================================================
   2bigthink — homepage styles (v1, draft)
   Typography: Fraunces (headlines) + Inter (body/UI)
   Palette: near-black + white base, logo grays for structure, green accent
   ========================================================================== */

:root {
  --color-bg: #FFFFFF;
  --color-text: #08090A;
  --color-text-secondary: rgba(8, 9, 10, 0.62);
  --color-text-muted: rgba(8, 9, 10, 0.45);

  --color-gray-mid: #707276;   /* from logo */
  --color-gray-light: #BABBBD; /* from logo */

  --color-surface: #F7F7F6;
  --color-surface-alt: #FAFAF9;
  --color-border: #E6E6E4;

  --color-accent: #16B876;      /* bright green */
  --color-accent-deep: #0C7A4E; /* deep green */
  --color-accent-tint: #E9F8F1; /* pale green for pills/backgrounds */

  --color-error: #C0392B;

  --font-serif: "Fraunces", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --radius-sm: 4px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --container-width: 1120px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text-secondary);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

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

a {
  color: inherit;
}

.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;
}

/* Headings share the serif, weight stays at 400 — hierarchy from size/spacing only */
h1, h2, h3 {
  font-family: var(--font-serif);
  font-optical-sizing: auto;
  font-weight: 400;
  font-style: normal;
  font-variation-settings: "SOFT" 0, "WONK" 0;
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.15;
}

h1 {
  font-size: clamp(2.25rem, 4.5vw, 3.25rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  letter-spacing: -0.015em;
  margin-bottom: 16px;
  position: relative;
  padding-left: 18px;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.2em;
  width: 3px;
  height: 0.75em;
  background: var(--color-accent);
  border-radius: 2px;
}

h3 {
  font-size: 1.15rem;
  color: var(--color-text);
  margin-bottom: 8px;
}

p {
  max-width: 62ch;
}

.section-intro {
  font-size: 1.0625rem;
  max-width: 60ch;
  margin-bottom: 40px;
}

.section-footnote {
  margin-top: 32px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.link-quiet {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
}

.link-quiet:hover {
  color: var(--color-accent-deep);
}

/* ---------- Layout rhythm ---------- */

.section {
  padding: 88px 0;
}

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

/* ---------- Legal pages (privacy policy, terms) ---------- */

.legal-content {
  max-width: 720px;
}

.legal-content .legal-meta {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
}

.legal-content h2 {
  margin-top: 56px;
}

.legal-content h2:first-of-type {
  margin-top: 40px;
}

.legal-content h3 {
  margin-top: 28px;
}

.legal-content p {
  max-width: none;
  margin-bottom: 16px;
}

.legal-content ul {
  list-style: disc;
  padding-left: 22px;
  margin-bottom: 16px;
}

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

.legal-content li:last-child {
  margin-bottom: 0;
}

.legal-content code {
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  padding: 2px 5px;
  font-size: 0.9em;
}

.legal-content .legal-table-wrap {
  overflow-x: auto;
  margin-bottom: 24px;
}

.legal-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.legal-content th,
.legal-content td {
  border: 1px solid var(--color-border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.legal-content th {
  background: var(--color-surface);
  font-weight: 600;
  color: var(--color-text);
}

.legal-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 48px 0;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.site-header .logo img {
  display: block;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav a:not(.btn) {
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.site-nav a:not(.btn):hover {
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1;
  padding: 14px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

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

.btn-primary:hover {
  background: #000;
}

.btn-small {
  padding: 10px 16px;
}

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

.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 88px;
}

.hero-lines {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse 50% 58% at 14% 52%, #000 25%, transparent 75%);
  mask-image: radial-gradient(ellipse 50% 58% at 14% 52%, #000 25%, transparent 75%);
}

.hero-lines-flip {
  -webkit-mask-image: radial-gradient(ellipse 62% 62% at 68% 55%, #000 30%, transparent 78%);
  mask-image: radial-gradient(ellipse 62% 62% at 68% 55%, #000 30%, transparent 78%);
}

.hero-lines-right {
  -webkit-mask-image: radial-gradient(ellipse 50% 58% at 86% 52%, #000 25%, transparent 75%);
  mask-image: radial-gradient(ellipse 50% 58% at 86% 52%, #000 25%, transparent 75%);
}

.hero-lines-right .wave-graphic {
  left: auto;
  right: -18%;
  transform: scaleX(-1);
  animation-name: wave-drift-flip;
}

.wave-graphic {
  position: absolute;
  top: 10%;
  left: -18%;
  width: 780px;
  height: 380px;
  max-width: none;
  background: linear-gradient(100deg, transparent 0%, var(--color-accent) 40%, var(--color-accent) 58%, transparent 100%);
  -webkit-mask-image: url("../assets/images/waves2.png");
  mask-image: url("../assets/images/waves2.png");
  -webkit-mask-size: cover;
  mask-size: cover;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  opacity: 0.7;
  animation: wave-drift 20s ease-in-out infinite alternate;
}

.hero-lines-flip .wave-graphic {
  left: -10%;
  top: 4%;
  width: 1100px;
  height: 540px;
  transform: scaleX(-1);
  animation-name: wave-drift-flip;
}

@keyframes wave-drift {
  0%   { transform: translate(0, 0); }
  50%  { transform: translate(-18px, 10px); }
  100% { transform: translate(14px, -8px); }
}

@keyframes wave-drift-flip {
  0%   { transform: scaleX(-1) translate(0, 0); }
  50%  { transform: scaleX(-1) translate(-18px, 10px); }
  100% { transform: scaleX(-1) translate(14px, -8px); }
}

@media (prefers-reduced-motion: reduce) {
  .wave-graphic {
    animation: none;
  }
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 40px;
}

.hero-content {
  flex: 0 0 480px;
  max-width: 480px;
  position: relative;
  z-index: 2;
}

.hero-visual {
  flex: 1;
  min-width: 0;
}

.hero-visual img {
  position: absolute;
  top: 50%;
  right: -40px;
  transform: translateY(-50%);
  z-index: 1;
  display: block;
  width: 704px;
  max-width: none;
}

.hero .lede {
  font-size: 1.1875rem;
  margin-top: 20px;
  margin-bottom: 36px;
}

.snapshot-form {
  display: flex;
  gap: 10px;
  max-width: 460px;
  flex-wrap: wrap;
}

.snapshot-form input[type="email"] {
  flex: 1 1 240px;
  min-width: 0;
  padding: 14px 16px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.snapshot-form input[type="email"]:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-tint);
}

.snapshot-form.is-submitted {
  align-items: center;
}

.snapshot-form .form-success {
  font-size: 0.9375rem;
  color: var(--color-text);
}

.form-note {
  margin-top: 18px;
}

.form-caption {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ---------- Signup form ---------- */

.signup-hero .hero-content {
  flex: 0 0 520px;
  max-width: 520px;
}

.signup-hero h1 {
  margin-bottom: 32px;
}

.signup-hero .hero-grid {
  align-items: flex-start;
}

.signup-hero .hero-visual img {
  top: 0;
  transform: none;
}

.signup-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 520px;
  margin-top: 8px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-row-city {
  grid-template-columns: 1.4fr 0.8fr 0.8fr;
}

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

.optional-tag {
  font-weight: 400;
  color: var(--color-text-muted);
}

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

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-tint);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.field-hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.form-group.has-error input,
.form-group.has-error textarea {
  border-color: var(--color-error);
}

.form-group.has-error .field-hint {
  color: var(--color-error);
}

.checkbox-row,
.radio-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  cursor: pointer;
}

.checkbox-row input,
.radio-row input {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  accent-color: var(--color-accent);
}

.payment-toggle {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border: none;
  padding: 0;
}

.payment-toggle legend {
  padding: 0;
  margin-bottom: 2px;
}

.plan-toggle {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border: none;
  padding: 0;
  margin-bottom: 4px;
}

.plan-toggle legend {
  padding: 0;
  margin-bottom: 2px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text);
}

.plan-save {
  color: var(--color-accent-deep);
  font-weight: 500;
}

.payment-fields {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.payment-fields[hidden] {
  display: none;
}

.form-error {
  font-size: 0.875rem;
  color: var(--color-error);
}

.btn-full {
  width: 100%;
}

.signup-form .form-success {
  font-size: 1rem;
  color: var(--color-text);
}

.signup-form .form-success.form-success--payment {
  font-size: 1.375rem;
  font-weight: 500;
  color: var(--color-accent-deep);
  padding: 20px 24px;
  background: var(--color-accent-tint);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
}

/* ---------- Card grid (why it matters) ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

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

.card-icon {
  display: inline-flex;
  margin-bottom: 16px;
}

.card-icon svg {
  width: 40px;
  height: 40px;
}

.card p {
  font-size: 0.9375rem;
}

/* ---------- How it works ---------- */

#how-it-works {
  position: relative;
  overflow: hidden;
}

#how-it-works .container {
  position: relative;
  z-index: 1;
}

.steps {
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.step {
  flex: 1 1 0;
  min-width: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.step-arrow {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  align-self: center;
}

.step-arrow svg {
  width: 20px;
  height: 20px;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-bottom: 14px;
  border-radius: 50%;
  border: 1px solid var(--color-accent);
  color: var(--color-accent-deep);
  font-family: var(--font-serif);
  font-size: 0.9375rem;
}

.step h3 {
  font-size: 1.0625rem;
}

.step-meta {
  color: var(--color-text-muted);
  font-family: var(--font-sans);
  font-size: 0.85em;
}

.steps p {
  font-size: 0.875rem;
  max-width: none;
}

/* ---------- Sample report ---------- */

.report-grid {
  display: flex;
  align-items: center;
  gap: 56px;
}

.report-copy {
  flex: 1;
  min-width: 0;
}

.report-copy h2 {
  margin-bottom: 20px;
}

.report-copy .btn {
  margin-top: 8px;
}

.report-visual {
  flex: 1.25;
  min-width: 0;
}

.report-copy p {
  font-size: 0.9375rem;
  margin-bottom: 12px;
  max-width: 60ch;
}

/* ---------- Feature list (what you get) ---------- */

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px 40px;
}

.feature p {
  font-size: 0.9375rem;
}

/* ---------- Who it's for ---------- */

#who-its-for {
  position: relative;
  overflow: hidden;
}

#who-its-for .container {
  position: relative;
  z-index: 1;
}

.tag-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-list li {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-accent-tint);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 16px;
}

/* ---------- Pricing ---------- */

.pricing-card {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 640px;
  margin-bottom: 28px;
}

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

.pricing-col-featured {
  background: #fff;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
}

.pricing-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.pricing-amount {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.25rem;
  color: var(--color-text);
}

.pricing-period {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.pricing-save {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-accent-deep);
  background: var(--color-accent-tint);
  border-radius: 999px;
  padding: 4px 10px;
}

#snapshot-pricing {
  margin-bottom: 10px;
}

/* ---------- FAQ ---------- */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: 760px;
}

.faq-item {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
}

.faq-item p {
  font-size: 0.9375rem;
}

/* ---------- Why 2bigthink ---------- */

.why-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin-top: 8px;
}

.why-item p {
  font-size: 0.9375rem;
  max-width: 72ch;
}

/* ---------- Closing CTA ---------- */

.closing-cta {
  position: relative;
  overflow: hidden;
  text-align: left;
  background: #12141A;
  padding: 110px 0;
}

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

.closing-cta-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.closing-cta h2 {
  color: #fff;
  margin-bottom: 12px;
}

.closing-cta .section-intro {
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 0;
}

.closing-cta .snapshot-form {
  flex: 0 0 460px;
  max-width: 100%;
}

.closing-cta .snapshot-form input[type="email"] {
  background: #fff;
  border-color: rgba(255, 255, 255, 0.12);
}

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

.closing-cta .btn-primary:hover {
  background: var(--color-accent-tint);
}

.closing-cta .form-success {
  color: #fff;
}

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

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-nav a {
  text-decoration: none;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.footer-nav a:hover {
  color: var(--color-text);
}

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  max-width: none;
}

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

@media (max-width: 860px) {
  .card-grid,
  .feature-list,
  .pricing-card {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 64px 0;
  }

  .hero-grid {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-content,
  .signup-hero .hero-content {
    flex: none;
    max-width: none;
  }

  .signup-form {
    max-width: none;
  }

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

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

  .hero-visual img {
    position: static;
    transform: none;
    width: 100%;
    max-width: 480px;
  }

  .steps {
    flex-direction: column;
    gap: 16px;
  }

  .step-arrow {
    width: auto;
    padding: 4px 0;
  }

  .step-arrow svg {
    transform: rotate(90deg);
  }

  .report-grid {
    flex-direction: column;
    align-items: stretch;
  }

  .closing-cta {
    padding: 72px 0;
  }

  .closing-cta-grid {
    flex-direction: column;
    align-items: flex-start;
  }

  .closing-cta .snapshot-form {
    flex: none;
    width: 100%;
    max-width: 460px;
  }
}

@media (max-width: 720px) {
  .site-nav {
    position: fixed;
    top: 61px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 24px 20px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease, transform 0.15s ease;
  }

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

  .site-nav a {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav a.btn {
    border-bottom: none;
    margin-top: 12px;
    width: auto;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 56px 0 64px;
  }

  .wave-graphic {
    width: 700px;
    height: 340px;
    opacity: 0.5;
  }

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