/* ============================================================
   FlowCue Marketing Website — styles.css
   Premium Editorial Design
   ============================================================ */

/* ----- Design Tokens ----- */
:root {
  --emerald-900: #064E3B;
  --emerald-800: #065F46;
  --emerald-700: #047857;
  --emerald-600: #059669;
  --emerald-500: #10B981;
  --emerald-100: #D1FAE5;
  --emerald-50:  #ECFDF5;

  --gray-950: #0C0F0E;
  --gray-900: #1A1F1E;
  --gray-800: #2D3332;
  --gray-700: #3F4946;
  --gray-600: #52615E;
  --gray-400: #94A3A0;
  --gray-300: #B8C4C0;
  --gray-200: #D5DCDA;
  --gray-100: #EDF0EF;
  --gray-50:  #F6F8F7;
  --white:    #FAFBFA;

  --dark-bg:      #0A1F1A;
  --dark-surface: #112B24;
  --dark-border:  #1E3D34;
  --dark-text:    #E8F0ED;
  --dark-muted:   #8FA89F;

  --cta-primary: var(--emerald-700);
  --cta-hover:   var(--emerald-600);
  --link:        var(--emerald-700);
  --link-hover:  var(--emerald-800);

  --font-serif: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-sans:  'General Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  24px;
  --space-6:  32px;
  --space-7:  48px;
  --space-8:  64px;
  --space-9:  96px;
  --space-10: 128px;

  --max-width: 1120px;
  --max-prose: 660px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}


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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--gray-800);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--link); text-decoration: none; transition: color 200ms ease; }
a:hover { color: var(--link-hover); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input { font: 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;
}


/* ----- Grain Overlay ----- */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.028;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}


/* ----- Layout ----- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-7);
}

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

.section {
  padding: var(--space-10) 0;
  position: relative;
}

.section-muted {
  background: var(--gray-50);
}


/* ----- Typography ----- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--gray-900);
  line-height: 1.1;
}

.hero-headline {
  font-size: clamp(44px, 6.5vw, 76px);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.02;
  color: var(--gray-950);
  margin-bottom: var(--space-5);
}

.section-headline {
  font-size: clamp(32px, 4vw, 50px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin-bottom: var(--space-5);
}

h3 {
  font-size: clamp(20px, 2vw, 24px);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin-bottom: var(--space-3);
}

.overline {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--emerald-700);
  margin-bottom: var(--space-5);
  padding: 6px 14px;
  background: var(--emerald-50);
  border-radius: 100px;
}

.overline-dark {
  background: rgba(16, 185, 129, 0.1);
  color: var(--emerald-500);
}

.prose p {
  margin-bottom: var(--space-5);
  font-size: 18px;
  line-height: 1.75;
}

.prose p:last-child {
  margin-bottom: 0;
}


/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  transition: all 200ms ease;
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.btn-primary {
  background: var(--gray-950);
  color: #fff;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1), 0 1px 3px rgba(0,0,0,0.06);
}

.btn-primary:hover {
  background: var(--gray-800);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

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

.btn-secondary {
  background: transparent;
  border: 1.5px solid var(--gray-200);
  color: var(--gray-700);
}

.btn-secondary:hover {
  border-color: var(--gray-800);
  color: var(--gray-900);
  background: var(--gray-50);
}

.btn-sm {
  font-size: 14px;
  padding: 10px 20px;
}


/* ----- Navigation ----- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: background 400ms ease, box-shadow 400ms ease, backdrop-filter 400ms ease;
}

.site-header.scrolled {
  background: rgba(250, 251, 250, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.06);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-7);
  display: flex;
  align-items: center;
  height: 64px;
  gap: var(--space-6);
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 800;
  text-decoration: none;
  flex-shrink: 0;
  letter-spacing: -0.02em;
}

.logo-flow { color: var(--gray-900); }
.logo-cue { color: var(--emerald-700); }

.nav-logo:hover .logo-flow { color: var(--gray-900); }
.nav-logo:hover .logo-cue { color: var(--emerald-600); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-left: auto;
}

.nav-links a {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-600);
  text-decoration: none;
  transition: color 200ms ease;
  letter-spacing: -0.01em;
}

.nav-links a:hover { color: var(--gray-900); }

.nav-cta {
  flex-shrink: 0;
  margin-left: var(--space-4);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--gray-900);
  border-radius: 1px;
  transition: all 200ms ease;
}


/* ----- Breadcrumb ----- */
.breadcrumb {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
}


/* ----- Hero Section ----- */
.hero {
  padding-top: calc(64px + var(--space-10));
  padding-bottom: var(--space-9);
  background: var(--white);
  overflow: hidden;
  text-align: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-bg::before {
  content: '';
  position: absolute;
  width: 800px;
  height: 800px;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(4, 120, 87, 0.04) 0%, transparent 65%);
  filter: blur(80px);
}

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

.hero-subhead {
  font-size: 19px;
  color: var(--gray-600);
  max-width: 540px;
  margin: 0 auto var(--space-7);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  margin-bottom: var(--space-9);
}

.hero-note {
  color: var(--gray-400);
  margin-top: var(--space-6);
}

.hero-note small {
  font-size: 13px;
  letter-spacing: -0.01em;
}


/* ----- MacBook Mockup ----- */
.hero-device {
  max-width: 780px;
  margin: 0 auto;
}

.macbook-wrap {
  position: relative;
  filter: drop-shadow(0 20px 60px rgba(0,0,0,0.18)) drop-shadow(0 8px 20px rgba(0,0,0,0.08));
}

.macbook-svg {
  width: 100%;
  height: auto;
}

.macbook-screen-area {
  transition: fill 300ms ease;
}


/* ----- Problem Section ----- */
#problem .section-headline,
#problem .overline {
  text-align: center;
}

#problem .prose {
  text-align: center;
  max-width: 580px;
  margin: 0 auto;
}

#problem .overline {
  display: block;
  text-align: center;
}

#problem .prose p {
  color: var(--gray-600);
}

#problem .prose strong {
  color: var(--gray-900);
}


/* ----- Alternatives Grid ----- */
.alternatives-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: var(--space-7) 0;
  background: var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--gray-200);
}

.alt-card {
  background: var(--white);
  padding: var(--space-6) var(--space-6) var(--space-7);
  position: relative;
}

.alt-card-number {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-300);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-4);
}

.alt-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--space-2);
  line-height: 1.3;
}

.alt-example {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  color: var(--gray-400);
}

.alt-card p {
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.6;
}

.section-punch {
  text-align: center;
  font-size: 19px;
  color: var(--gray-900);
  margin-top: var(--space-7);
}


/* ----- How It Works (Steps) ----- */
.steps {
  margin-top: var(--space-7);
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.step {
  display: flex;
  gap: var(--space-6);
  position: relative;
  padding-bottom: var(--space-7);
}

.step:last-child {
  padding-bottom: 0;
}

.step-marker {
  flex-shrink: 0;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Connecting line between steps */
.step:not(:last-child) .step-marker::after {
  content: '';
  position: absolute;
  top: 52px;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  bottom: 0;
  background: var(--gray-200);
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1.5px solid var(--gray-200);
  background: var(--white);
  color: var(--gray-900);
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.step-body h3 {
  margin-bottom: var(--space-2);
  padding-top: 2px;
}

.step-body p {
  font-size: 16px;
  color: var(--gray-600);
  line-height: 1.7;
}


/* ----- Benefits Grid ----- */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-7);
}

.benefit-card {
  padding: var(--space-6);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  transition: all 300ms ease;
  background: var(--white);
}

.benefit-card:hover {
  border-color: var(--gray-200);
  box-shadow: 0 8px 30px rgba(0,0,0,0.06);
}

.benefit-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--emerald-50);
  color: var(--emerald-700);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}

.benefit-card h3 {
  font-size: 20px;
  margin-bottom: var(--space-2);
}

.benefit-card p {
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.7;
}


/* ----- Dark Privacy Section ----- */
.section-dark {
  background: var(--dark-bg);
  color: var(--dark-text);
  padding: var(--space-10) 0;
}

.section-dark .section-headline {
  color: var(--dark-text);
}

.privacy-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-9);
  align-items: start;
}

.privacy-lead {
  color: var(--dark-muted);
  font-size: 17px;
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.privacy-bottom {
  color: var(--emerald-500);
  font-size: 17px;
}

.privacy-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  padding-top: var(--space-7);
}

.privacy-feature {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-5);
  background: var(--dark-surface);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-md);
}

.privacy-feature-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(16, 185, 129, 0.1);
  color: var(--emerald-500);
  display: flex;
  align-items: center;
  justify-content: center;
}

.privacy-feature h3 {
  color: var(--dark-text);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--space-1);
  font-family: var(--font-sans);
}

.privacy-feature p {
  color: var(--dark-muted);
  font-size: 14px;
  line-height: 1.55;
}


/* ----- Use Cases Grid ----- */
.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-7);
}

.use-case-card {
  padding: var(--space-6);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  transition: all 300ms ease;
  background: var(--white);
}

.use-case-card:hover {
  border-color: var(--gray-200);
  box-shadow: 0 8px 30px rgba(0,0,0,0.06);
}

.use-case-card h3 {
  font-size: 20px;
  margin-bottom: var(--space-2);
}

.use-case-card p {
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.7;
}

.use-case-card abbr {
  text-decoration: underline dotted var(--gray-400);
  text-underline-offset: 3px;
}

.use-cases-aside {
  margin-top: var(--space-6);
  padding: var(--space-5) var(--space-6);
  border-left: 2px solid var(--emerald-500);
  color: var(--gray-600);
  font-size: 15px;
}


/* ----- Comparison ----- */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  margin-top: var(--space-7);
}

.comparison-col {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.comparison-col-header {
  padding: var(--space-4) var(--space-5);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.comparison-others {
  border: 1px solid var(--gray-200);
  background: var(--white);
}

.comparison-others .comparison-col-header {
  background: var(--gray-50);
  color: var(--gray-600);
  border-bottom: 1px solid var(--gray-200);
}

.comparison-flowcue {
  border: 1.5px solid var(--emerald-700);
  background: var(--white);
}

.comparison-flowcue .comparison-col-header {
  background: var(--emerald-700);
  color: #fff;
}

.comparison-list {
  padding: var(--space-3) 0;
}

.comparison-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
}

.comparison-list li svg {
  flex-shrink: 0;
  margin-top: 3px;
}

.comparison-others .comparison-list li svg {
  color: var(--gray-300);
}

.comparison-flowcue .comparison-list li svg {
  color: var(--emerald-600);
}

.comparison-list li strong {
  display: block;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-900);
  letter-spacing: -0.01em;
}

.comparison-list li span {
  font-size: 13px;
  color: var(--gray-500);
  line-height: 1.4;
}


/* ----- FAQ ----- */
.faq-list {
  margin-top: var(--space-7);
}

.faq-item {
  border-bottom: 1px solid var(--gray-100);
}

.faq-item:first-child {
  border-top: 1px solid var(--gray-100);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) 0;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  color: var(--gray-900);
  line-height: 1.4;
  transition: color 200ms ease;
  letter-spacing: -0.01em;
}

.faq-item summary:hover {
  color: var(--gray-700);
}

.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::marker { content: ''; }

.faq-chevron {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--gray-400);
  transition: transform 300ms var(--ease-out);
  margin-left: var(--space-4);
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 0 var(--space-5);
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.7;
}


/* ----- CTA / Waitlist Section ----- */
.section-cta {
  text-align: center;
  background: var(--gray-950);
  color: var(--dark-text);
}

.section-cta .section-headline {
  color: var(--dark-text);
}

.cta-sub {
  font-size: 17px;
  color: var(--dark-muted);
  max-width: 460px;
  margin: 0 auto var(--space-7);
}

.waitlist-form {
  position: relative;
  z-index: 1;
}

.form-group {
  display: flex;
  gap: var(--space-3);
  max-width: 440px;
  margin: 0 auto;
}

.form-input {
  flex: 1;
  padding: 13px 18px;
  font-size: 15px;
  border: 1.5px solid var(--dark-border);
  border-radius: var(--radius-sm);
  background: var(--dark-surface);
  color: var(--dark-text);
  transition: border-color 200ms ease, box-shadow 200ms ease;
  outline: none;
}

.form-input::placeholder {
  color: var(--dark-muted);
}

.form-input:focus {
  border-color: var(--emerald-600);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.section-cta .btn-primary {
  background: var(--emerald-700);
}

.section-cta .btn-primary:hover {
  background: var(--emerald-600);
}

.cta-note {
  margin-top: var(--space-5);
  color: var(--dark-muted);
}

.cta-note small {
  font-size: 13px;
}


/* ----- Footer ----- */
.site-footer {
  background: var(--gray-950);
  color: var(--dark-muted);
  padding: var(--space-8) 0 var(--space-7);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: var(--space-7);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  margin-bottom: var(--space-6);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.footer-logo .logo-flow { color: var(--dark-text); }
.footer-logo .logo-cue { color: var(--emerald-500); }

.footer-tagline {
  font-size: 14px;
  color: var(--dark-muted);
  margin-top: var(--space-2);
}

.footer-links {
  display: flex;
  gap: var(--space-9);
}

.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--dark-muted);
  margin-bottom: var(--space-4);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-col a {
  font-size: 14px;
  color: var(--dark-muted);
  transition: color 200ms ease;
}

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

.footer-bottom {
  font-size: 13px;
  color: rgba(255,255,255,0.3);
}


/* ----- Animations: Hero Load ----- */
.anim-hero {
  opacity: 0;
  transform: translateY(20px);
}

.anim-hero.visible {
  animation: hero-reveal var(--ease-out) forwards;
}

.anim-hero[data-delay="0"].visible { animation-duration: 500ms; animation-delay: 0ms; }
.anim-hero[data-delay="1"].visible { animation-duration: 600ms; animation-delay: 80ms; }
.anim-hero[data-delay="2"].visible { animation-duration: 550ms; animation-delay: 180ms; }
.anim-hero[data-delay="3"].visible { animation-duration: 500ms; animation-delay: 300ms; }
.anim-hero[data-delay="4"].visible { animation-duration: 900ms; animation-delay: 250ms; }
.anim-hero[data-delay="5"].visible { animation-duration: 500ms; animation-delay: 500ms; }

@keyframes hero-reveal {
  from {
    opacity: 0;
    transform: translateY(var(--hero-offset, 20px)) scale(var(--start-scale, 1));
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.anim-hero[data-delay="4"] {
  --start-scale: 0.97;
  --hero-offset: 30px;
}


/* ----- Animations: Scroll Reveals ----- */
.anim-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}

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


/* ----- Focus States ----- */
:focus-visible {
  outline: 2px solid var(--emerald-700);
  outline-offset: 2px;
  border-radius: 4px;
}

.btn:focus-visible {
  outline: 2px solid var(--emerald-700);
  outline-offset: 2px;
}


/* ----- Reduced Motion ----- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .anim-hero,
  .anim-scroll {
    opacity: 1;
    transform: none;
  }
}


/* ----- Responsive: Tablet ----- */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--space-5);
  }

  .nav-container {
    padding: 0 var(--space-5);
  }

  .section {
    padding: var(--space-9) 0;
  }

  .privacy-layout {
    grid-template-columns: 1fr;
    gap: var(--space-7);
  }

  .privacy-features {
    padding-top: 0;
  }

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

  .comparison-grid {
    gap: var(--space-4);
  }
}


/* ----- Responsive: Mobile ----- */
@media (max-width: 639px) {
  body { font-size: 16px; }

  .container { padding: 0 var(--space-4); }

  .section { padding: 80px 0; }

  /* Nav */
  .nav-container {
    padding: 0 var(--space-4);
    height: 56px;
  }

  .nav-toggle { display: flex; }

  .nav-links,
  .nav-cta { display: none; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(250, 251, 250, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: var(--space-5) var(--space-4);
    gap: var(--space-1);
    box-shadow: 0 12px 40px rgba(0,0,0,0.08);
    z-index: 100;
    border-top: 1px solid var(--gray-100);
  }

  .nav-links.open a {
    display: block;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-sm);
    font-size: 15px;
  }

  .nav-links.open a:hover {
    background: var(--gray-50);
  }

  .nav-cta.open {
    display: inline-flex;
    position: absolute;
    top: calc(56px + 200px);
    left: var(--space-4);
    right: var(--space-4);
    z-index: 100;
    text-align: center;
    justify-content: center;
  }

  /* Hero */
  .hero {
    padding-top: calc(56px + var(--space-8));
    padding-bottom: var(--space-8);
  }

  .hero-headline { font-size: clamp(36px, 10vw, 48px); }

  .hero-subhead { font-size: 16px; }

  .hero-actions {
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--space-7);
  }

  .hero-actions .btn { width: 100%; max-width: 300px; }

  /* Grids stack */
  .alternatives-grid {
    grid-template-columns: 1fr;
  }

  .steps {
    max-width: none;
  }

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

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

  /* Section headlines */
  .section-headline {
    font-size: clamp(28px, 7vw, 36px);
  }

  /* Form stack */
  .form-group {
    flex-direction: column;
  }

  .form-group .btn { width: 100%; }

  /* Footer */
  .footer-top {
    flex-direction: column;
    gap: var(--space-7);
  }

  .footer-links { gap: var(--space-7); }

  /* Privacy */
  .privacy-layout {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}