/* ============================================================
   WELLET LANDING PAGE — Moss/Green Palette
   ============================================================ */

:root {
  /* Type Scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Fonts */
  --font-display: 'DM Serif Display', serif;
  --font-body: 'DM Sans', sans-serif;
}

/* ============================================================
   LIGHT MODE (Default) — Moss/Green
   ============================================================ */
:root,
[data-theme='light'] {
  --color-bg: #f5f7f3;
  --color-surface: #f9faf7;
  --color-surface-2: #ffffff;
  --color-surface-offset: #eef1eb;
  --color-divider: #d4dace;
  --color-border: #c2cbb8;

  --color-text: #1a2416;
  --color-text-muted: #5a6b52;
  --color-text-faint: #94a38c;
  --color-text-inverse: #f5f7f3;

  --color-primary: #2d6a4f;
  --color-primary-hover: #1b4332;
  --color-primary-active: #143226;
  --color-primary-light: #d8f3dc;

  --color-accent: #52796f;
  --color-accent-light: #cad2c5;

  --shadow-sm: 0 1px 2px rgba(26, 36, 22, 0.06);
  --shadow-md: 0 4px 12px rgba(26, 36, 22, 0.08);
  --shadow-lg: 0 12px 32px rgba(26, 36, 22, 0.12);
}

/* ============================================================
   DARK MODE
   ============================================================ */
[data-theme='dark'] {
  --color-bg: #141a12;
  --color-surface: #1a2116;
  --color-surface-2: #1f281a;
  --color-surface-offset: #1c2418;
  --color-divider: #2a3524;
  --color-border: #3a4a32;

  --color-text: #d4dace;
  --color-text-muted: #8a9a80;
  --color-text-faint: #5a6b52;
  --color-text-inverse: #1a2416;

  --color-primary: #52b788;
  --color-primary-hover: #74c69d;
  --color-primary-active: #95d5b2;
  --color-primary-light: #1b3a2a;

  --color-accent: #74c69d;
  --color-accent-light: #2d4a3a;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #141a12;
    --color-surface: #1a2116;
    --color-surface-2: #1f281a;
    --color-surface-offset: #1c2418;
    --color-divider: #2a3524;
    --color-border: #3a4a32;
    --color-text: #d4dace;
    --color-text-muted: #8a9a80;
    --color-text-faint: #5a6b52;
    --color-text-inverse: #1a2416;
    --color-primary: #52b788;
    --color-primary-hover: #74c69d;
    --color-primary-active: #95d5b2;
    --color-primary-light: #1b3a2a;
    --color-accent: #74c69d;
    --color-accent-light: #2d4a3a;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
  }
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
}

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

section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

/* ============================================================
   HEADER / NAV
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 90%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  padding: var(--space-4) 0;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
}

.logo-mark {
  width: 36px;
  height: 36px;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
}

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

.theme-toggle {
  padding: var(--space-2);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* Mobile nav */
.mobile-nav-toggle {
  display: none;
  padding: var(--space-2);
  color: var(--color-text);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-divider);
    padding: var(--space-4) var(--space-6);
    gap: var(--space-4);
  }
  .nav-links.open {
    display: flex;
  }
  .mobile-nav-toggle {
    display: block;
  }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--color-text);
  max-width: 18ch;
  margin: 0 auto var(--space-6);
  line-height: 1.1;
}

.hero h1 strong {
  color: var(--color-primary);
  font-weight: 400;
}

.hero-subtitle {
  font-size: var(--text-lg);
  font-weight: 300;
  color: var(--color-text-muted);
  max-width: 48ch;
  margin: 0 auto var(--space-8);
  line-height: 1.5;
}

/* ============================================================
   WAITLIST FORM (Two-option)
   ============================================================ */
.waitlist {
  max-width: 480px;
  margin: 0 auto;
}

.waitlist-options {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.waitlist-option {
  flex: 1;
  position: relative;
}

.waitlist-option input[type='checkbox'] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.waitlist-option label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-3);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-interactive);
  background: var(--color-surface-2);
}

.waitlist-option label:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.waitlist-option input:checked + label {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.waitlist-option .option-icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.waitlist-option .option-title {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
}

.waitlist-option .option-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.4;
}

.waitlist-email-row {
  display: flex;
  gap: var(--space-2);
}

.waitlist-email-row input[type='email'] {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  font-size: var(--text-sm);
}

.waitlist-email-row input[type='email']:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 20%, transparent);
}

.waitlist-email-row input::placeholder {
  color: var(--color-text-faint);
}

.btn-primary {
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

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

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

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.waitlist-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-3);
  text-align: center;
}

.waitlist-success {
  display: none;
  text-align: center;
  padding: var(--space-6);
  background: var(--color-primary-light);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-primary);
}

.waitlist-success.visible {
  display: block;
}

.waitlist-success p {
  color: var(--color-primary);
  font-weight: 500;
  margin: 0 auto;
}

.waitlist-error {
  display: none;
  text-align: center;
  padding: var(--space-3);
  color: #964219;
  font-size: var(--text-sm);
  margin-top: var(--space-2);
}

.waitlist-error.visible {
  display: block;
}

/* ============================================================
   STAT STRIP
   ============================================================ */
.stat-strip {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  padding-block: var(--space-10);
}

.stat-strip .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  text-align: center;
}

.stat-item .stat-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  display: block;
  letter-spacing: -0.02em;
}

.stat-item .stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.stat-item .stat-source {
  font-size: 11px;
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}

.stat-item .stat-source a {
  color: var(--color-text-faint);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--color-text-faint) 50%, transparent);
}

.stat-item .stat-source a:hover {
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .stat-strip .container {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
}

/* ============================================================
   PROBLEM / FEATURES
   ============================================================ */
.problem-section {
  background: var(--color-bg);
}

.problem-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  text-align: center;
  margin-bottom: var(--space-4);
  line-height: 1.1;
}

.problem-section .section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-base);
  font-weight: 300;
  max-width: 52ch;
  margin: 0 auto var(--space-12);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.feature-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
}

.feature-card .feature-icon {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.feature-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.feature-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   HOW IT WORKS
   ============================================================ */
.how-it-works {
  background: var(--color-surface);
}

.how-it-works h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  text-align: center;
  margin-bottom: var(--space-12);
  line-height: 1.1;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  counter-reset: steps;
}

.step {
  text-align: center;
  counter-increment: steps;
}

.step::before {
  content: counter(steps);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
}

.step h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.step p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 32ch;
  margin: 0 auto;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .steps-grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
}

/* ============================================================
   PRICING
   ============================================================ */
.pricing-section {
  background: var(--color-bg);
}

.pricing-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  text-align: center;
  margin-bottom: var(--space-3);
  line-height: 1.1;
}

.pricing-section .section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-base);
  font-weight: 300;
  max-width: 52ch;
  margin: 0 auto var(--space-12);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  align-items: start;
}

.pricing-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-lg);
}

.pricing-card .card-badge {
  position: absolute;
  top: calc(-1 * var(--space-3));
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  white-space: nowrap;
}

.pricing-card .tier-name {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.pricing-card .tier-tagline {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.pricing-card .price {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  margin-bottom: var(--space-1);
}

.pricing-card .price-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-6);
}

.pricing-card ul {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-6);
}

.pricing-card li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-divider);
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}

.pricing-card li:last-child {
  border-bottom: none;
}

.pricing-card li svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 3px;
}

.pricing-card .btn-tier {
  display: block;
  width: 100%;
  text-align: center;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.pricing-card .btn-tier:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.pricing-card.featured .btn-tier {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.pricing-card.featured .btn-tier:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

@media (max-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-inline: auto;
  }
}

/* ============================================================
   FOUNDER
   ============================================================ */
.founder-section {
  background: var(--color-surface);
}

.founder-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  text-align: center;
  margin-bottom: var(--space-10);
  line-height: 1.1;
}

.founder-card {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  gap: var(--space-8);
  align-items: flex-start;
}

.founder-avatar {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary);
}

.founder-bio h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.founder-bio .founder-title {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-4);
}

.founder-bio p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-3);
}

.founder-links {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.founder-links a {
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.founder-links a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .founder-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .founder-links {
    justify-content: center;
  }
}

/* ============================================================
   CTA BOTTOM
   ============================================================ */
.cta-bottom {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  text-align: center;
}

.cta-bottom h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  margin-bottom: var(--space-4);
  line-height: 1.1;
  color: var(--color-text-inverse);
}

.cta-bottom p {
  font-size: var(--text-base);
  opacity: 0.85;
  max-width: 48ch;
  margin: 0 auto var(--space-8);
}

.cta-bottom .btn-cta {
  display: inline-block;
  padding: var(--space-4) var(--space-8);
  background: var(--color-text-inverse);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.cta-bottom .btn-cta:hover {
  opacity: 0.9;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-8);
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}