/* ==========================================================================
   Flowbase — Design Tokens
   ========================================================================== */
:root {
  /* Color tokens (dark tech / gradient accent) */
  --color-bg: #0A0A0F;
  --color-bg-alt: #0E0E16;
  --color-surface: #121219;
  --color-surface-alt: #15151F;
  --color-card: #14141D;
  --color-border: #24242F;
  --color-border-strong: #33334A;
  --color-foreground: #F5F5FA;
  --color-muted-foreground: #9B9BB0;
  --color-faint: #6E6E85;

  --color-violet: #8B5CF6;
  --color-violet-strong: #7C3AED;
  --color-cyan: #22D3EE;
  --color-cyan-strong: #0891B2;
  --gradient-accent: linear-gradient(120deg, #8B5CF6 0%, #6366F1 45%, #22D3EE 100%);
  --gradient-accent-diag: linear-gradient(135deg, #7C3AED, #22D3EE);

  --color-on-primary: #0A0A0F;
  --color-destructive: #F87171;
  --color-success: #34D399;
  --color-ring: #8B5CF6;

  /* Typography */
  --font-heading: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing scale (8pt rhythm) */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-6: 3rem;
  --space-8: 4rem;
  --space-12: 6rem;

  /* Radius & shadow */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 0 1px rgba(139, 92, 246, 0.25), 0 8px 32px rgba(139, 92, 246, 0.18);

  --transition-base: 220ms cubic-bezier(0.22, 1, 0.36, 1);
  --header-height: 76px;
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); color-scheme: dark; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-foreground);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; margin: 0; padding: 0; }
button { font: inherit; cursor: pointer; }
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 600; line-height: 1.15; margin: 0 0 var(--space-2); color: var(--color-foreground); letter-spacing: -0.01em; }
p { margin: 0 0 var(--space-2); color: var(--color-muted-foreground); }
input, select, textarea { font: inherit; color: inherit; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-3); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-violet-strong);
  color: #fff;
  padding: var(--space-1) var(--space-2);
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 3px solid var(--color-ring);
  outline-offset: 2px;
  border-radius: 4px;
}

.eyebrow {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-cyan);
  margin-bottom: var(--space-1);
}

.text-gradient {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section-head { max-width: 640px; margin-bottom: var(--space-6); }
.section-sub { font-size: 1.05rem; }
section { padding-block: var(--space-12); }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  border: 1.5px solid transparent;
  transition: transform var(--transition-base), background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
  min-height: 44px;
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: var(--gradient-accent-diag);
  color: #0A0A0F;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { box-shadow: 0 0 0 1px rgba(139, 92, 246, 0.4), 0 14px 40px rgba(34, 211, 238, 0.25); }
.btn-outline { background: rgba(255,255,255,0.03); color: var(--color-foreground); border-color: var(--color-border-strong); }
.btn-outline:hover { background: rgba(255,255,255,0.06); border-color: var(--color-violet); }
.btn-sm { padding: 0.6rem 1.35rem; font-size: 0.875rem; min-height: 40px; }
.btn-lg { padding: 1rem 2.1rem; font-size: 1rem; }
.btn-block { width: 100%; }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.site-header.is-scrolled { border-color: var(--color-border); box-shadow: var(--shadow-sm); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-3);
}

.brand { display: inline-flex; align-items: center; gap: 0.6rem; }
.brand-mark { display: inline-flex; }
.brand-name { font-family: var(--font-heading); font-weight: 700; font-size: 1.25rem; color: var(--color-foreground); }
.brand-accent { background: var(--gradient-accent); -webkit-background-clip: text; background-clip: text; color: transparent; }

.main-nav ul { display: flex; gap: var(--space-4); }
.main-nav a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-muted-foreground);
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition-base);
}
.main-nav a:hover, .main-nav a:focus-visible { color: var(--color-foreground); }
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -2px;
  height: 2px;
  background: var(--gradient-accent-diag);
  transition: right var(--transition-base);
}
.main-nav a:hover::after, .main-nav a:focus-visible::after { right: 0; }

.header-actions { display: flex; align-items: center; gap: var(--space-2); }
.header-login { font-size: 0.9rem; font-weight: 600; color: var(--color-muted-foreground); padding: 0.5rem; transition: color var(--transition-base); }
.header-login:hover { color: var(--color-foreground); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-foreground);
  padding: 0.5rem;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { position: relative; overflow: hidden; padding-top: var(--space-8); }
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(560px 420px at 12% -10%, rgba(139, 92, 246, 0.28), transparent 60%),
    radial-gradient(600px 460px at 92% 10%, rgba(34, 211, 238, 0.20), transparent 60%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  align-items: center;
  gap: var(--space-8);
  padding-block: var(--space-8) var(--space-6);
}
.hero-copy h1 { font-size: clamp(2.4rem, 4.6vw, 3.6rem); margin-bottom: var(--space-3); }
.hero-lede { font-size: 1.15rem; max-width: 46ch; margin-bottom: var(--space-4); }
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-3); }
.hero-note { font-size: 0.85rem; color: var(--color-faint); margin: 0; }
.hero-media img { width: 100%; height: auto; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); border: 1px solid var(--color-border); }

.stat-strip { position: relative; z-index: 1; border-top: 1px solid var(--color-border); background: rgba(255,255,255,0.02); }
.stat-strip-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-4); padding-block: var(--space-4); }
.stat { display: flex; flex-direction: column; }
.stat strong { font-family: var(--font-heading); font-size: 1.75rem; font-weight: 700; background: var(--gradient-accent); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { font-size: 0.85rem; color: var(--color-muted-foreground); }

/* ==========================================================================
   Reveal-on-scroll
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.hero .reveal { transition-delay: 60ms; }

/* ==========================================================================
   Bento grid / features
   ========================================================================== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: minmax(200px, auto);
  gap: var(--space-3);
}
.bento-card {
  position: relative;
  grid-column: span 2;
  background: linear-gradient(180deg, rgba(255,255,255,0.035), rgba(255,255,255,0.01));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  overflow: hidden;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}
.bento-card:hover { border-color: rgba(139, 92, 246, 0.5); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.bento-lg { grid-column: span 2; }
.bento-grid > .bento-card:nth-child(3),
.bento-grid > .bento-card:nth-child(5),
.bento-grid > .bento-card:nth-child(6) { grid-column: span 2; }
@media (min-width: 861px) {
  .bento-grid { grid-template-columns: repeat(6, 1fr); }
  .bento-grid > .bento-card:nth-child(1) { grid-column: span 4; }
  .bento-grid > .bento-card:nth-child(2) { grid-column: span 2; }
  .bento-grid > .bento-card:nth-child(3) { grid-column: span 2; }
  .bento-grid > .bento-card:nth-child(4) { grid-column: span 4; }
  .bento-grid > .bento-card:nth-child(5) { grid-column: span 3; }
  .bento-grid > .bento-card:nth-child(6) { grid-column: span 3; }
}
.bento-illustration { position: absolute; right: -10%; bottom: -8%; width: 62%; opacity: 0.9; pointer-events: none; }
.bento-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  background: var(--gradient-accent-diag);
  color: #0A0A0F;
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-2);
  flex-shrink: 0;
}
.bento-card h3 { font-size: 1.15rem; margin-bottom: 0.4rem; position: relative; z-index: 1; }
.bento-card p { font-size: 0.95rem; margin: 0; max-width: 42ch; position: relative; z-index: 1; }

/* ==========================================================================
   How it works
   ========================================================================== */
.how-it-works { background: var(--color-bg-alt); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); counter-reset: step; }
.steps li { position: relative; padding: var(--space-4); background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  background: rgba(139, 92, 246, 0.12);
  color: var(--color-cyan);
  border: 1px solid rgba(139, 92, 246, 0.35);
  margin-bottom: var(--space-2);
}
.steps h3 { font-size: 1.1rem; }
.steps p { font-size: 0.95rem; margin: 0; }

/* ==========================================================================
   Pricing
   ========================================================================== */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); align-items: stretch; }
.price-card {
  position: relative;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), border-color var(--transition-base);
}
.price-card:hover { transform: translateY(-3px); }
.price-card h3 { font-size: 1.3rem; margin-bottom: 0.25rem; }
.price-sub { font-size: 0.9rem; min-height: 2.6em; }
.price { display: flex; align-items: baseline; gap: 0.35rem; margin: var(--space-2) 0 var(--space-3); }
.price-amount { font-family: var(--font-heading); font-size: 2.4rem; font-weight: 700; color: var(--color-foreground); }
.price-period { font-size: 0.9rem; color: var(--color-muted-foreground); }
.price-features { margin-top: var(--space-4); display: flex; flex-direction: column; gap: 0.65rem; }
.price-features li { font-size: 0.9rem; color: var(--color-muted-foreground); padding-left: 1.6rem; position: relative; }
.price-features li::before {
  content: "";
  position: absolute; left: 0; top: 0.35em;
  width: 16px; height: 16px;
  background: rgba(34, 211, 238, 0.15);
  border: 1px solid rgba(34, 211, 238, 0.4);
  border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2322D3EE' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 10px;
}
.price-card-featured {
  border: 1px solid transparent;
  background:
    linear-gradient(var(--color-card), var(--color-card)) padding-box,
    var(--gradient-accent-diag) border-box;
  box-shadow: var(--shadow-glow);
  transform: scale(1.03);
}
.price-card-featured:hover { transform: scale(1.03) translateY(-3px); }
.price-badge {
  position: absolute;
  top: -14px; left: var(--space-4);
  background: var(--gradient-accent-diag);
  color: #0A0A0F;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-pill);
}

/* ==========================================================================
   Testimonials
   ========================================================================== */
.testimonials { background: var(--color-bg-alt); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.testimonial-carousel { max-width: 720px; margin: 0 auto; text-align: center; }
.testimonial-track { position: relative; min-height: 260px; }
.testimonial-card {
  margin: 0;
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}
.testimonial-card.is-active { opacity: 1; visibility: visible; position: relative; }
.stars { color: var(--color-cyan); letter-spacing: 0.2em; margin-bottom: var(--space-2); font-size: 1.1rem; }
.testimonial-card blockquote { margin: 0 0 var(--space-3); font-size: 1.25rem; font-weight: 500; color: var(--color-foreground); line-height: 1.45; }
.testimonial-card figcaption { display: flex; align-items: center; justify-content: center; gap: 0.6rem; font-size: 0.9rem; color: var(--color-muted-foreground); }
.testimonial-card figcaption strong { color: var(--color-foreground); }
.t-avatar { width: 34px; height: 34px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
.testimonial-controls { display: flex; align-items: center; justify-content: center; gap: var(--space-3); margin-top: var(--space-4); }
.testimonial-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--color-foreground);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}
.testimonial-btn:hover { background: var(--color-surface-alt); border-color: var(--color-violet); }
.testimonial-dots { display: flex; gap: 0.5rem; }
.testimonial-dots button {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-border-strong);
  border: none; padding: 0;
}
.testimonial-dots button.is-active { background: var(--color-cyan); width: 22px; border-radius: 999px; transition: width var(--transition-base), background-color var(--transition-base); }

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.accordion { max-width: 780px; }
.accordion-item { border-bottom: 1px solid var(--color-border); }
.accordion-item h3 { margin: 0; font-family: var(--font-body); }
.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  background: none;
  border: none;
  text-align: left;
  padding: var(--space-3) 0.25rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-foreground);
  min-height: 44px;
}
.accordion-chevron { flex-shrink: 0; transition: transform var(--transition-base); color: var(--color-cyan); }
.accordion-trigger[aria-expanded="true"] .accordion-chevron { transform: rotate(180deg); }
.accordion-panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-base);
}
.accordion-panel p { padding: 0 0.25rem var(--space-3); font-size: 0.98rem; margin: 0; }
.accordion-trigger[aria-expanded="true"] + .accordion-panel { max-height: 320px; }

/* ==========================================================================
   Signup CTA
   ========================================================================== */
.signup { position: relative; overflow: hidden; }
.signup-glow { position: absolute; top: 50%; left: 8%; transform: translateY(-50%); width: 620px; max-width: 60vw; z-index: 0; pointer-events: none; }
.signup-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-8); align-items: center; }
.signup h2 { font-size: clamp(1.9rem, 3.2vw, 2.6rem); }
.signup-points { display: flex; flex-direction: column; gap: var(--space-2); margin-top: var(--space-4); }
.signup-points li { display: flex; align-items: center; gap: 0.6rem; color: var(--color-muted-foreground); font-size: 0.98rem; }
.signup-points svg { color: var(--color-cyan); flex-shrink: 0; }

.signup-form {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.field { margin-bottom: var(--space-3); display: flex; flex-direction: column; }
.field label { font-weight: 600; font-size: 0.9rem; margin-bottom: 0.4rem; color: var(--color-foreground); }
.field input, .field select, .field textarea {
  border: 1.5px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  background: var(--color-surface);
  color: var(--color-foreground);
  min-height: 44px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.field select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239B9BB0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  background-size: 18px;
  padding-right: 2.5rem;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--color-violet);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.25);
  outline: none;
}
.field.has-error input, .field.has-error select, .field.has-error textarea { border-color: var(--color-destructive); }
.field-error { color: var(--color-destructive); font-size: 0.82rem; margin-top: 0.3rem; min-height: 1.1em; }

.form-status { margin: var(--space-2) 0 0; font-size: 0.9rem; font-weight: 600; text-align: center; min-height: 1.2em; }
.form-status.is-success { color: var(--color-success); }
.form-status.is-error { color: var(--color-destructive); }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { background: var(--color-bg-alt); border-top: 1px solid var(--color-border); padding-block: var(--space-8) var(--space-4); }
.footer-top { display: grid; grid-template-columns: 1.2fr 2fr; gap: var(--space-8); margin-bottom: var(--space-6); }
.footer-brand p { font-size: 0.9rem; max-width: 30ch; margin: var(--space-2) 0 var(--space-3); }
.social-links { display: flex; gap: var(--space-2); }
.social-links a {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--color-muted-foreground);
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}
.social-links a:hover { background: var(--gradient-accent-diag); color: #0A0A0F; border-color: transparent; }

.footer-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.footer-col { display: flex; flex-direction: column; gap: 0.65rem; }
.footer-col h4 { font-family: var(--font-heading); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-faint); margin-bottom: 0.4rem; }
.footer-col a { font-size: 0.92rem; color: var(--color-muted-foreground); transition: color var(--transition-base); }
.footer-col a:hover { color: var(--color-foreground); }

.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-2); padding-top: var(--space-4); border-top: 1px solid var(--color-border); }
.footer-legal, .footer-legal-links a { font-size: 0.85rem; color: var(--color-faint); margin: 0; }
.footer-legal-links { display: flex; gap: var(--space-3); }
.footer-legal-links a:hover { color: var(--color-muted-foreground); }

/* ==========================================================================
   Back to top
   ========================================================================== */
.back-to-top {
  position: fixed;
  right: var(--space-3);
  bottom: var(--space-3);
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--gradient-accent-diag);
  color: #0A0A0F;
  border: none;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
  z-index: 90;
  transition: transform var(--transition-base);
}
.back-to-top.is-visible { display: inline-flex; }
.back-to-top:hover { transform: translateY(-3px); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-media { order: -1; }
  .steps { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .price-card-featured { transform: none; order: -1; }
  .price-card-featured:hover { transform: translateY(-3px); }
  .footer-top { grid-template-columns: 1fr; }
  .signup-grid { grid-template-columns: 1fr; }
  .signup-glow { display: none; }
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }
  .main-nav.is-open { opacity: 1; transform: translateY(0); visibility: visible; }
  .main-nav ul { flex-direction: column; gap: 0; padding: var(--space-2) var(--space-3); }
  .main-nav a { display: block; padding: var(--space-2) 0; border-bottom: 1px solid var(--color-border); }
  .header-actions .header-login { display: none; }

  .bento-grid { grid-template-columns: 1fr; }
  .bento-lg, .bento-card { grid-column: span 1 !important; }
  .bento-illustration { width: 50%; opacity: 0.6; }

  .footer-nav { grid-template-columns: 1fr 1fr; gap: var(--space-4) var(--space-3); }
}

@media (max-width: 640px) {
  section { padding-block: var(--space-8); }
  .hero { padding-top: var(--space-4); }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }
  .stat-strip-inner { justify-content: flex-start; gap: var(--space-4) var(--space-6); }
  .footer-nav { grid-template-columns: 1fr; }
  .testimonial-card blockquote { font-size: 1.05rem; }
  .header-actions { gap: 0.5rem; }
  .header-actions .btn-sm { padding: 0.6rem 1rem; font-size: 0.8rem; white-space: nowrap; }
}