/* ============================================
   Simply Scale Landing Page — Design System & Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --color-accent: #caed06;
  --color-accent-hover: #b8d805;
  --color-bg: #101011;
  --color-surface: #1a1a1c;
  --color-surface-hover: #222224;
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-subtle: rgba(255, 255, 255, 0.08);
  --color-text: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.7);
  --color-text-muted: rgba(255, 255, 255, 0.45);
  --color-focus: #4d65ff;
  --color-error: #ff4d4d;

  --font-family: 'Switzer', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.75rem;
  --font-size-5xl: 3.5rem;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;

  --max-width: 1200px;
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

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

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-4xl) 0;
}

#problem {
  padding-bottom: var(--spacing-3xl);
}

#why {
  padding-top: var(--spacing-3xl);
}

#use-cases {
  padding-bottom: var(--spacing-3xl);
}

#how-it-works {
  padding-top: var(--spacing-3xl);
}

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

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

.text-center {
  text-align: center;
}

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

/* --- Typography --- */
.eyebrow {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
}

.heading-1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-lg);
}

.heading-2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-lg);
}

.heading-3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
}

.body-lg {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.875rem 2rem;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  line-height: 1;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-bg);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(202, 237, 6, 0.25);
}

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

.btn-outline {
  background-color: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.btn-outline:hover {
  background-color: rgba(202, 237, 6, 0.1);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-accent);
  padding: 0.5rem 1rem;
}

.btn-ghost:hover {
  background: rgba(202, 237, 6, 0.1);
}

/* --- Header / Nav --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--spacing-md) 0;
  background: rgba(16, 16, 17, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  text-decoration: none;
}

.logo svg {
  height: 48px;
  width: auto;
}

.footer .logo svg {
  height: 36px;
}

.logo .arrow {
  transition: fill var(--transition-base);
}

.logo:hover .arrow {
  fill: var(--color-accent);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.header-nav a {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.header-nav a:hover {
  opacity: 0.5;
}

.header-cta {
  font-size: var(--font-size-sm);
  padding: 0.625rem 1.25rem;
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.header-cta.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* --- Hero Section --- */
.hero {
  padding-top: calc(80px + var(--spacing-4xl));
  padding-bottom: var(--spacing-2xl);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.hero-content {
  max-width: 560px;
}

.hero-bullets {
  list-style: none;
  margin: var(--spacing-xl) 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.hero-bullets li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.hero-bullets .bullet-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  color: var(--color-accent);
}

.hero-video {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 */
  margin: var(--spacing-xl) 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.hero-video iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.hero-social-proof {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--spacing-xl);
}

/* --- Form Card (Calendly Widget) --- */
.form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg) var(--spacing-lg) 0;
  overflow: hidden;
}

.form-card-heading {
  color: #fff;
  text-align: center;
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
}

.calendly-inline-widget {
  min-height: 320px;
}

/* --- Trust Bar / Marquee --- */
.trust-bar {
  padding: var(--spacing-2xl) 0;
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
  overflow: hidden;
}

.trust-bar-label {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-lg);
  padding: 0 var(--spacing-lg);
}

.trust-bar img {
  display: inline-block !important;
  height: 28px !important;
  width: auto !important;
  max-width: none !important;
  vertical-align: middle;
}

.marquee-track {
  animation: marquee-scroll 25s linear infinite !important;
}

.marquee-track:hover {
  animation-play-state: paused;
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* --- Problem Section --- */
.problem-section {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.problem-section .heading-2 {
  margin-bottom: var(--spacing-lg);
}

.problem-section .body-lg {
  margin-bottom: var(--spacing-lg);
}

.problem-section .problem-cta-text {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-style: italic;
  margin-bottom: var(--spacing-xl);
}

/* --- Value Props --- */
.value-props-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.value-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--spacing-2xl);
  transition: all var(--transition-base);
}

.value-card:hover {
  border-color: var(--color-border);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.value-card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-lg);
  color: var(--color-accent);
}

.value-card h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

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

/* --- Stats Section --- */
.stats-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

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

.stat-item .stat-number {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-item .stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* --- Use Cases Toggle --- */
.use-cases-section .section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.toggle-wrapper {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-2xl);
}

.toggle-bar {
  display: inline-flex;
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 4px;
}

.toggle-indicator {
  position: absolute;
  top: 4px;
  left: 4px;
  height: calc(100% - 8px);
  width: calc(33.333% - 3px);
  background: var(--color-accent);
  border-radius: 6px;
  transition: transform var(--transition-base);
  z-index: 0;
}

.toggle-btn {
  position: relative;
  z-index: 1;
  padding: 0.625rem 1.5rem;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.toggle-btn.active {
  color: var(--color-bg);
}

.toggle-btn:not(.active):hover {
  color: var(--color-text);
}

.use-cases-grid {
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.use-cases-grid.active {
  display: grid;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.use-case-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-left: 3px solid transparent;
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
}

.use-case-card:hover {
  border-left-color: var(--color-accent);
  background: var(--color-surface-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.use-case-card h4 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
  transition: color var(--transition-fast);
}

.use-case-card:hover h4 {
  color: var(--color-accent);
}

.use-case-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  transition: color var(--transition-fast);
}

.use-case-card:hover p {
  color: var(--color-text-secondary);
}

.use-cases-cta {
  text-align: center;
  margin-top: var(--spacing-2xl);
}

/* --- How It Works --- */
.how-it-works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.step-card {
  text-align: center;
  padding: var(--spacing-xl);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(202, 237, 6, 0.1);
  border: 2px solid var(--color-accent);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  margin-bottom: var(--spacing-lg);
}

.step-card h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

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

/* --- Testimonials --- */
.testimonials-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--spacing-2xl);
}

.testimonial-arrows {
  display: flex;
  gap: var(--spacing-sm);
}

.testimonial-arrow {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.testimonial-arrow:hover {
  border-color: var(--color-accent);
  background: rgba(202, 237, 6, 0.1);
}

.testimonials-viewport {
  overflow: hidden;
}

.testimonials-track {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.testimonial-card {
  flex: 0 0 calc(33.333% - var(--spacing-xl) * 2 / 3);
  margin-right: var(--spacing-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
}

.testimonial-card:last-child {
  margin-right: 0;
}

.testimonial-headline {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
}

.testimonial-stars {
  color: var(--color-accent);
  font-size: var(--font-size-lg);
  letter-spacing: 2px;
  margin-bottom: var(--spacing-md);
}

.testimonial-body {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.7;
  flex: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.testimonial-name {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
}

.testimonial-role {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  margin-top: 2px;
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

/* --- Final CTA --- */
.final-cta {
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface) 100%);
}

.final-cta .heading-2 {
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.final-cta .body-lg {
  max-width: 500px;
  margin: 0 auto var(--spacing-xl);
}

/* --- Footer --- */
.footer {
  padding: var(--spacing-2xl) 0;
  border-top: 1px solid var(--color-border-subtle);
}

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

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.footer-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.footer-copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.footer-social a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-social a:hover {
  color: var(--color-accent);
}

.footer-social svg {
  width: 20px;
  height: 20px;
}

/* --- Thank You Page --- */
.thank-you-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  padding-top: calc(80px + var(--spacing-4xl));
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.thank-you-content .heading-1 {
  margin-bottom: var(--spacing-md);
}

.thank-you-content .body-lg {
  margin-bottom: var(--spacing-2xl);
}

.calendly-embed {
  width: 100%;
  max-width: 700px;
  min-height: 650px;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: var(--spacing-xl);
}

/* --- Scroll Animations --- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
  }

  .hero-bullets li {
    justify-content: center;
  }

  .hero-social-proof {
    text-align: center;
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2xl);
  }

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

  .how-it-works-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
  }

  .testimonial-card {
    flex: 0 0 calc(50% - var(--spacing-xl) / 2);
  }
}

@media (max-width: 768px) {
  .header-nav {
    display: none;
  }

  :root {
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.625rem;
    --font-size-5xl: 2.5rem;
  }

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

  .hero {
    padding-top: calc(70px + var(--spacing-2xl));
    padding-bottom: var(--spacing-2xl);
    min-height: auto;
  }

  .value-props-grid {
    grid-template-columns: 1fr;
  }

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

  .use-cases-grid.active {
    grid-template-columns: 1fr;
  }

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

  .testimonial-card {
    flex: 0 0 100%;
    margin-right: var(--spacing-xl);
  }

  .form-card {
    padding: var(--spacing-lg) var(--spacing-lg) 0;
  }

  .calendly-inline-widget {
    min-height: 320px;
  }

  .trust-logos {
    gap: var(--spacing-xl);
  }

  .toggle-btn {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-xs);
  }

  .footer .container {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }

  .footer-right {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .trust-logos {
    gap: var(--spacing-lg);
  }

  .trust-logos span {
    font-size: var(--font-size-sm);
  }
}