/* ============================================================
   PERFLUO — Landing Page Styles
   Palette: Deep violet-to-blue gradient brand, clean white surfaces
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,300&family=DM+Serif+Display:ital@0;1&display=swap');

/* ── TOKENS ─────────────────────────────────────────────── */
:root,
[data-theme='light'] {
  --color-bg: #f8f8fc;
  --color-surface: #ffffff;
  --color-surface-2: #f2f2f8;
  --color-border: #e2e0ee;
  --color-divider: #ebebf4;

  --color-text: #1a1825;
  --color-text-muted: #6b6880;
  --color-text-faint: #b0adc4;
  --color-text-inverse: #ffffff;

  --color-primary: #7C5CBF;
  --color-primary-hover: #6445a8;
  --color-primary-active: #4d338d;
  --color-accent: #4EB8CC;
  --color-accent-hover: #38a5bb;

  --color-callout-bg: linear-gradient(135deg, #7C5CBF 0%, #4EB8CC 100%);

  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;

  --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-hero: clamp(2.8rem,   1.5rem + 5vw,    5.5rem);

  --space-1: .25rem; --space-2: .5rem; --space-3: .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;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(100,80,160,0.07);
  --shadow-md: 0 4px 16px rgba(100,80,160,0.1);
  --shadow-lg: 0 12px 40px rgba(100,80,160,0.14);
  --shadow-device: 0 24px 64px rgba(100,80,160,0.2);

  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-default: 1100px;
  --content-narrow: 680px;
}

[data-theme='dark'] {
  --color-bg: #0f0d18;
  --color-surface: #161324;
  --color-surface-2: #1d1930;
  --color-border: #2e2a44;
  --color-divider: #231f38;
  --color-text: #e8e6f5;
  --color-text-muted: #9e9ab8;
  --color-text-faint: #5a5678;
  --color-text-inverse: #0f0d18;
  --color-primary: #a886e8;
  --color-primary-hover: #bc9ff0;
  --color-primary-active: #cebbf8;
  --color-accent: #6dd4e8;
  --color-accent-hover: #85dff0;
  --color-surface: #161324;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  --shadow-device: 0 24px 64px rgba(0,0,0,0.6);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0f0d18;
    --color-surface: #161324;
    --color-surface-2: #1d1930;
    --color-border: #2e2a44;
    --color-divider: #231f38;
    --color-text: #e8e6f5;
    --color-text-muted: #9e9ab8;
    --color-text-faint: #5a5678;
    --color-primary: #a886e8;
    --color-primary-hover: #bc9ff0;
    --color-accent: #6dd4e8;
    --shadow-device: 0 24px 64px rgba(0,0,0,0.6);
  }
}

/* ── BASE ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  min-height: 100dvh;
}
img, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'] { list-style: none; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
input, select, textarea { font: inherit; color: inherit; }
h1,h2,h3,h4 { line-height: 1.15; text-wrap: balance; }
p, li { text-wrap: pretty; }
::selection { background: rgba(124,92,191,0.2); color: var(--color-text); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* ── LAYOUT ─────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-12));
}
.section { padding-block: clamp(var(--space-12), 8vw, var(--space-24)); }
.section-alt { background: var(--color-surface-2); }

/* ── HEADER ─────────────────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.header--scrolled { box-shadow: var(--shadow-md); }
.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-12));
  height: 68px;
}
.logo { flex-shrink: 0; text-decoration: none; }
.logo-text {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  display: block;
}
.nav { display: flex; gap: var(--space-6); margin-left: auto; }
.nav-link { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); transition: color var(--transition); }
.nav-link:hover { color: var(--color-primary); }
.header-actions { display: flex; align-items: center; gap: var(--space-3); }
.theme-toggle {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--transition), background var(--transition);
}
.theme-toggle:hover { color: var(--color-primary); background: var(--color-surface-2); }
.menu-toggle { display: none; padding: var(--space-2); color: var(--color-text-muted); }
.mobile-nav { display: none; flex-direction: column; background: var(--color-surface); border-top: 1px solid var(--color-border); }
.mobile-nav-link { padding: var(--space-4) clamp(var(--space-5), 5vw, var(--space-12)); font-weight: 500; color: var(--color-text-muted); border-bottom: 1px solid var(--color-divider); transition: color var(--transition); }
.mobile-nav-link:hover { color: var(--color-primary); }
.mobile-nav.open { display: flex; }

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  padding: 0.6em 1.4em;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-hover); box-shadow: 0 4px 16px rgba(124,92,191,0.3); }
.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn-ghost:hover { background: rgba(124,92,191,0.07); }
.btn-white { background: #fff; color: var(--color-primary); }
.btn-white:hover { background: rgba(255,255,255,0.9); box-shadow: var(--shadow-md); }
.btn-lg { padding: 0.75em 2em; font-size: var(--text-base); }
.btn-full { width: 100%; }

/* ── HERO ────────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(var(--space-16), 10vw, var(--space-24));
  min-height: 88vh;
  display: flex;
  align-items: center;
}
.hero-bg-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 70% at 80% 40%, rgba(124,92,191,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 20% 80%, rgba(78,184,204,0.1) 0%, transparent 70%);
  pointer-events: none;
}
.hero-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 6vw, var(--space-16));
  align-items: center;
}
.hero-text { display: flex; flex-direction: column; gap: var(--space-5); }
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(124,92,191,0.1);
  color: var(--color-primary);
  border: 1px solid rgba(124,92,191,0.2);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  width: fit-content;
}
.hero-heading {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  color: var(--color-text);
  font-weight: 400;
  line-height: 1.1;
}
.hero-heading em {
  font-style: italic;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 50ch;
  font-weight: 300;
}
.hero-price-row { display: flex; align-items: baseline; gap: var(--space-3); }
.price {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
}
.price-lg { font-size: clamp(2.5rem, 5vw, 3.5rem); }
.price-note { font-size: var(--text-sm); color: var(--color-text-muted); }
.hero-cta-row { display: flex; flex-wrap: wrap; gap: var(--space-3); }

/* Hero image */
.hero-image-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.device-glow {
  position: absolute;
  width: 70%;
  height: 70%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124,92,191,0.18) 0%, rgba(78,184,204,0.1) 50%, transparent 80%);
  filter: blur(32px);
  transform: translateY(10%);
}
.hero-device-img {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 560px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-device);
  object-fit: cover;
  transform: rotate(0deg);
  transition: transform 0.4s cubic-bezier(0.16,1,0.3,1);
}
.hero-device-img:hover { transform: scale(1.02); }

/* ── TRUST BAR ───────────────────────────────────────────── */
.trust-bar {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-5);
}
.trust-bar-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-8) var(--space-10);
}
.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}
.trust-item svg { color: var(--color-primary); flex-shrink: 0; }

/* ── SECTION HEADER ──────────────────────────────────────── */
.section-header { text-align: center; max-width: 640px; margin: 0 auto var(--space-12); }
.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.section-label.light { color: rgba(255,255,255,0.75); }
.section-header h2, .split-content h2, .order-text h2, .callout-text h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  margin-bottom: var(--space-4);
}
.section-intro { font-size: var(--text-base); color: var(--color-text-muted); }

/* ── PRODUCT SPLIT ───────────────────────────────────────── */
.section-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 6vw, var(--space-16));
  align-items: center;
}
.split-images {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
.split-img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 100%;
  object-fit: cover;
}
.split-img-main { aspect-ratio: 4/3; }
.split-img-secondary { aspect-ratio: 4/3; opacity: 0.85; margin-top: -var(--space-8); }
.split-content { display: flex; flex-direction: column; gap: var(--space-5); }
.split-content > p { color: var(--color-text-muted); font-size: var(--text-base); }

/* Feature list */
.feature-list { display: flex; flex-direction: column; gap: var(--space-5); }
.feature-list li { display: flex; gap: var(--space-4); align-items: flex-start; }
.feature-icon {
  flex-shrink: 0;
  width: 32px; height: 32px;
  background: rgba(124,92,191,0.1);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-primary);
  margin-top: 2px;
}
.feature-list strong { display: block; font-weight: 600; margin-bottom: var(--space-1); }
.feature-list p { font-size: var(--text-sm); color: var(--color-text-muted); margin: 0; max-width: none; }

/* ── STEPS ───────────────────────────────────────────────── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.step-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: box-shadow var(--transition), transform var(--transition);
}
.step-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.step-number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-primary);
  opacity: 0.25;
  line-height: 1;
  font-weight: 400;
}
.step-img {
  width: 100%;
  max-height: 160px;
  object-fit: contain;
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  padding: var(--space-4);
}
.step-card h3 { font-size: var(--text-lg); font-weight: 600; }
.step-card p { font-size: var(--text-sm); color: var(--color-text-muted); }

/* ── USES GRID ───────────────────────────────────────────── */
.uses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.use-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.use-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--color-primary); }
.use-icon {
  width: 52px; height: 52px;
  background: rgba(124,92,191,0.08);
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}
.use-card h3 { font-size: var(--text-base); font-weight: 600; }
.use-card p { font-size: var(--text-sm); color: var(--color-text-muted); }

/* ── CALLOUT ─────────────────────────────────────────────── */
.callout-section {
  background: linear-gradient(135deg, #7C5CBF 0%, #4EB8CC 100%);
  color: #fff;
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
}
.callout-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 6vw, var(--space-16));
  align-items: center;
}
.callout-text { display: flex; flex-direction: column; gap: var(--space-5); }
.callout-text h2 { color: #fff; }
.callout-text p { color: rgba(255,255,255,0.85); font-size: var(--text-base); max-width: 50ch; }
.callout-visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.callout-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-6);
  background: rgba(255,255,255,0.12);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
}
.stat-number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: #fff;
  line-height: 1;
}
.stat-label { font-size: var(--text-sm); color: rgba(255,255,255,0.75); font-weight: 500; }

/* ── ORDER ───────────────────────────────────────────────── */
.order-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 6vw, var(--space-16));
  align-items: start;
}
.order-text { display: flex; flex-direction: column; gap: var(--space-5); }
.order-text > p { color: var(--color-text-muted); }
.order-price-block { display: flex; align-items: baseline; gap: var(--space-3); }
.order-perks { display: flex; flex-direction: column; gap: var(--space-3); }
.order-perks li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.order-perks svg { color: var(--color-accent); flex-shrink: 0; }

/* Form card */
.order-form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-8), 4vw, var(--space-12));
  box-shadow: var(--shadow-lg);
}
.order-form-card h3 { font-size: var(--text-xl); font-weight: 600; margin-bottom: var(--space-2); }
.form-note { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-6); }
.contact-form { display: flex; flex-direction: column; gap: var(--space-5); }
.form-group { display: flex; flex-direction: column; gap: var(--space-2); }
.form-group label { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); }
.form-group input,
.form-group select,
.form-group textarea {
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(124,92,191,0.12);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--color-text-faint); }
.form-group textarea { resize: vertical; min-height: 80px; }

/* Success state */
.form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-4);
  padding: var(--space-12) var(--space-8);
  color: var(--color-primary);
}
.form-success p { font-size: var(--text-base); color: var(--color-text); }

/* ── FOOTER ──────────────────────────────────────────────── */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: clamp(var(--space-10), 6vw, var(--space-16));
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-6);
}
.footer-logo-text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.15em;
  font-weight: 400;
}
.footer-tagline { font-size: var(--text-sm); color: var(--color-text-muted); font-style: italic; }
.footer-supplied { font-size: var(--text-sm); color: var(--color-text-muted); }
.footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-6); }
.footer-links a { font-size: var(--text-sm); color: var(--color-text-muted); transition: color var(--transition); }
.footer-links a:hover { color: var(--color-primary); }
.footer-copy { font-size: var(--text-xs); color: var(--color-text-faint); }

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-layout { grid-template-columns: 1fr; }
  .hero-image-wrap { order: -1; max-width: 400px; margin-inline: auto; }
  .hero-text { text-align: center; align-items: center; }
  .hero-sub { text-align: center; }
  .hero-price-row { justify-content: center; }
  .hero-cta-row { justify-content: center; }
  .section-split { grid-template-columns: 1fr; }
  .split-images { order: -1; }
  .steps-grid { grid-template-columns: 1fr; gap: var(--space-5); }
  .uses-grid { grid-template-columns: 1fr 1fr; }
  .callout-inner { grid-template-columns: 1fr; }
  .callout-visual { flex-direction: row; flex-wrap: wrap; }
  .callout-stat { flex: 1 1 200px; }
  .order-layout { grid-template-columns: 1fr; }
  .nav { display: none; }
  .header-actions .btn-primary { display: none; }
  .menu-toggle { display: flex; }
}

@media (max-width: 600px) {
  .uses-grid { grid-template-columns: 1fr; }
  .trust-bar-inner { gap: var(--space-5); }
  .callout-visual { flex-direction: column; }
  .hero-cta-row { flex-direction: column; align-items: stretch; }
  .hero-cta-row .btn { text-align: center; justify-content: center; }
}

/* SEO: hero tagline under new H1 */
.hero-tagline {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--aqua, #2FB6C4);
  margin: -0.25rem 0 0.75rem;
  letter-spacing: 0.01em;
}