/* ============================================================
   QETENT — Main Stylesheet
   A clean, minimal, grayscale-only design system.
   
   Table of Contents:
   1.  CSS Custom Properties (Design Tokens)
   2.  CSS Reset & Base
   3.  Typography
   4.  Layout Utilities
   5.  Buttons
   6.  Navigation
   7.  Hero Section
   8.  Stats Bar
   9.  Apps Section
   10. About Section
   11. Process Section
   12. Testimonials Section
   13. Contact Section
   14. Footer
   15. Animations
   16. Responsive
   ============================================================ */


/* ============================================================
   1. CSS CUSTOM PROPERTIES
   ============================================================ */
:root {
  /* Grayscale palette — strictly no color */
  --color-black:      #000000;
  --color-ink:        #111111;
  --color-ink-soft:   #333333;
  --color-ink-muted:  #555555;
  --color-ink-light:  #888888;
  --color-border:     #e0e0e0;
  --color-border-soft:#ebebeb;
  --color-surface:    #f5f5f5;
  --color-surface-alt:#f0f0f0;
  --color-white:      #ffffff;

  /* Typography */
  --font-body:     'Fira Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading:  'Bebas Neue', 'Fira Sans', sans-serif;
  --font-mono:     'Roboto Mono', monospace;

  /* Font sizes (fluid) */
  --text-xs:   0.75rem;   /* 12px */
  --text-sm:   0.875rem;  /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-md:   1.125rem;  /* 18px */
  --text-lg:   1.25rem;   /* 20px */
  --text-xl:   1.5rem;    /* 24px */
  --text-2xl:  2rem;      /* 32px */

  /* Spacing scale */
  --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;

  /* Border radius */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(0,0,0,0.04);
  --shadow-sm: 0 2px 8px 0 rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px 0 rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px 0 rgba(0,0,0,0.10);
  --shadow-xl: 0 16px 48px 0 rgba(0,0,0,0.12);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Nav height */
  --nav-height: 72px;
  --nav-height-scrolled: 60px;

  /* Max content width */
  --container-max: 1200px;
  --container-pad: clamp(1.25rem, 5vw, 3rem);
}


/* ============================================================
   2. CSS RESET & BASE
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-ink);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font: inherit;
}

input,
textarea {
  font: inherit;
}

::selection {
  background-color: var(--color-ink);
  color: var(--color-white);
}

/* Focus visible — keyboard accessibility */
:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}


/* ============================================================
   3. TYPOGRAPHY
   ============================================================ */
h1, h2 {
  font-family: var(--font-heading);
  line-height: 1.05;
  letter-spacing: 0.03em;
  color: var(--color-ink);
  font-weight: 400;
}

h3, h4, h5 {
  font-family: var(--font-body);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  font-weight: 700;
}

em {
  font-style: italic;
}

/* Section headings */
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5.5vw, 3.8rem);
  font-weight: 400;
  letter-spacing: 0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-4);
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-3);
}

.section-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-md);
  color: var(--color-ink-muted);
  max-width: 56ch;
  line-height: 1.75;
}

.section-header {
  text-align: center;
  margin-bottom: clamp(3rem, 6vw, 5rem);
}

.section-header .section-subtitle {
  margin: 0 auto;
}


/* ============================================================
   4. LAYOUT UTILITIES
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: clamp(5rem, 10vw, 8rem);
}


/* ============================================================
   5. BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.875rem 2rem;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              background-color var(--transition-base),
              color var(--transition-base),
              border-color var(--transition-base);
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background-color: var(--color-ink);
  color: var(--color-white);
  border: 2px solid var(--color-ink);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-black);
  border-color: var(--color-black);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-ink);
  border: 2px solid var(--color-ink);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background-color: var(--color-surface);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-full {
  width: 100%;
  justify-content: center;
}


/* ============================================================
   6. NAVIGATION
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background-color: var(--color-white);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base),
              padding var(--transition-base);
}

/* JS adds this class on scroll */
.site-header.scrolled {
  border-bottom-color: var(--color-border-soft);
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  transition: height var(--transition-base);
}

.site-header.scrolled .nav {
  height: var(--nav-height-scrolled);
}

/* Logo */
.nav-logo {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--color-ink);
  gap: 8px;
  line-height: 1;
  user-select: none;
  text-decoration: none;
}

.nav-logo-icon,
.nav-logo .logo-mark {
  width: 34px;
  height: 34px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

.logo-text {
  color: var(--color-ink);
  letter-spacing: 0.05em;
}

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
  border-radius: 1px;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-ink);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

/* Hamburger button */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.hamburger:hover {
  background-color: var(--color-surface);
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-ink);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

/* Open state */
.hamburger.open .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.open .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.open .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


/* ============================================================
   7. HERO SECTION
   ============================================================ */
.hero {
  min-height: calc(100svh - var(--nav-height));
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: clamp(4rem, 8vw, 8rem);
  position: relative;
  overflow: hidden;
}

/* Subtle grid background */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border-soft) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.4;
  z-index: 0;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: center;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-ink-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.badge::before {
  content: '';
  width: 7px;
  height: 7px;
  background-color: var(--color-ink);
  border-radius: 50%;
  display: block;
}

.hero-eyebrow {
  margin-bottom: var(--space-5);
}

.hero-headline {
  font-family: var(--font-heading);
  font-size: clamp(3.2rem, 7.5vw, 6.2rem);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: 0.03em;
  margin-bottom: var(--space-6);
  color: var(--color-ink);
}

.hero-headline em {
  font-style: normal;
  position: relative;
  display: inline-block;
}

/* Underline accent on "People Love" */
.hero-headline em::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 4px;
  background-color: var(--color-ink);
  border-radius: 2px;
  opacity: 0.2;
}

.hero-subheadline {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-ink-muted);
  line-height: 1.75;
  margin-bottom: var(--space-10);
  max-width: 48ch;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Hero SVG illustration */
.hero-illustration {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-svg {
  width: 100%;
  max-width: 460px;
  height: auto;
  filter: drop-shadow(0 24px 48px rgba(0,0,0,0.07));
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.scroll-indicator-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-ink), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}

@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 1; }
  50%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  100% { transform: scaleY(1); transform-origin: bottom; opacity: 0; }
}


/* ============================================================
   8. STATS BAR
   ============================================================ */
.stats-bar {
  background-color: var(--color-ink);
  padding-block: clamp(2rem, 4vw, 3.5rem);
}

.stats-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
  flex: 1;
  min-width: 120px;
}

.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 4.5vw, 3.5rem);
  font-weight: 400;
  color: var(--color-white);
  line-height: 1;
  letter-spacing: 0.04em;
}

.stat-plus {
  font-size: 0.75em;
  vertical-align: super;
  margin-left: 1px;
  opacity: 0.7;
}

.stat-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.65);
  margin-top: var(--space-2);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.stat-divider {
  width: 1px;
  height: 48px;
  background-color: rgba(255,255,255,0.12);
  flex-shrink: 0;
}


/* ============================================================
   9. APPS SECTION
   ============================================================ */
.apps {
  background-color: var(--color-surface);
}

/* App Filter Tabs */
.app-filters {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
}

.filter-btn {
  padding: 8px 20px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background-color: var(--color-white);
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-ink-soft);
  color: var(--color-ink);
}

.filter-btn.active {
  background-color: var(--color-ink);
  color: var(--color-white);
  border-color: var(--color-ink);
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: clamp(1.25rem, 3vw, 2rem);
}

.app-card.is-hidden {
  display: none !important;
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: clamp(1.25rem, 3vw, 2rem);
}

/* App Card */
.app-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  padding: clamp(1.5rem, 3vw, 2rem);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
}

.app-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-border);
}

.app-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.app-icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  border-radius: 14px;
  overflow: hidden;
}

.app-icon svg {
  width: 100%;
  height: 100%;
}

.app-meta {
  flex: 1;
}

.app-name {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-1);
}

.app-rating {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.stars {
  font-size: var(--text-sm);
  color: var(--color-ink);
  letter-spacing: 1px;
}

.rating-value {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-muted);
}

.app-description {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.7;
  flex: 1;
}

/* Tags */
.app-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-soft);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

/* Store buttons */
.app-store-links {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.5rem 1rem;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast),
              box-shadow var(--transition-fast),
              background-color var(--transition-fast);
  flex: 1;
  justify-content: center;
  min-width: 100px;
}

.store-btn svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.store-btn--apple {
  background-color: var(--color-ink);
  color: var(--color-white);
  border: 1px solid var(--color-ink);
}

.store-btn--apple:hover {
  background-color: var(--color-black);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.store-btn--google {
  background-color: var(--color-white);
  color: var(--color-ink);
  border: 1px solid var(--color-border);
}

.store-btn--google:hover {
  background-color: var(--color-surface);
  transform: translateY(-1px);
  box-shadow: var(--shadow-xs);
}


/* ============================================================
   10. ABOUT SECTION
   ============================================================ */
.about {
  background-color: var(--color-white);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: start;
}

.about-left .section-title {
  margin-bottom: var(--space-6);
}

.about-body {
  color: var(--color-ink-muted);
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

.about-body em {
  color: var(--color-ink);
  font-style: italic;
}

/* Feature cards */
.feature-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.feature-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 44px;
  height: 44px;
  background-color: var(--color-surface);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink);
  flex-shrink: 0;
}

.feature-icon svg {
  width: 20px;
  height: 20px;
}

.feature-title {
  font-size: var(--text-md);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.feature-body {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.7;
}


/* ============================================================
   11. PROCESS SECTION
   ============================================================ */
.process {
  background-color: var(--color-surface);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  position: relative;
}

/* Horizontal connector line */
.process-steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + 24px);
  right: calc(12.5% + 24px);
  height: 1px;
  background: linear-gradient(
    to right,
    var(--color-border) 0%,
    var(--color-ink-light) 50%,
    var(--color-border) 100%
  );
  z-index: 0;
}

.process-step {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-4);
}

.step-number {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-white);
  background-color: var(--color-ink);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 3px solid var(--color-surface);
  box-shadow: 0 0 0 1px var(--color-border);
}

.step-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.step-icon {
  width: 48px;
  height: 48px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink);
  box-shadow: var(--shadow-xs);
}

.step-icon svg {
  width: 22px;
  height: 22px;
}

.step-title {
  font-size: var(--text-md);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.step-body {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.7;
}

.step-connector {
  display: none; /* used on mobile */
}


/* ============================================================
   12. TESTIMONIALS SECTION
   ============================================================ */
.testimonials {
  background-color: var(--color-white);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.25rem, 3vw, 2rem);
}

.testimonial-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  padding: clamp(1.5rem, 3vw, 2rem);
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.testimonial-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.testimonial-platform-tag {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-ink-muted);
  background-color: var(--color-surface);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-soft);
  letter-spacing: 0.02em;
}

.testimonial-stars {
  font-size: 1.1rem;
  color: var(--color-ink);
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: var(--text-base);
  color: var(--color-ink-soft);
  line-height: 1.8;
  font-style: italic;
  flex: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  border-top: 1px solid var(--color-border-soft);
  padding-top: var(--space-5);
}

.author-avatar {
  width: 44px;
  height: 44px;
  background-color: var(--color-ink);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 700;
  flex-shrink: 0;
  letter-spacing: 0.05em;
}

.author-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.author-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink);
}

.author-title {
  font-size: var(--text-xs);
  color: var(--color-ink-light);
  font-weight: 400;
}


/* ============================================================
   13. CONTACT SECTION
   ============================================================ */
.contact {
  background-color: var(--color-surface);
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: start;
}

.contact-left .section-title {
  margin-bottom: var(--space-5);
}

.contact-body {
  color: var(--color-ink-muted);
  line-height: 1.8;
  margin-bottom: var(--space-10);
  max-width: 40ch;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-ink);
  transition: color var(--transition-fast);
}

.contact-detail:hover {
  color: var(--color-ink-soft);
}

.contact-detail-icon {
  width: 40px;
  height: 40px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-detail-icon svg {
  width: 18px;
  height: 18px;
}

/* Social links */
.social-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.social-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-light);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.social-icons {
  display: flex;
  gap: var(--space-3);
}

.social-icon {
  width: 40px;
  height: 40px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink-muted);
  transition: color var(--transition-fast),
              background-color var(--transition-fast),
              border-color var(--transition-fast),
              transform var(--transition-fast);
}

.social-icon svg {
  width: 17px;
  height: 17px;
}

.social-icon:hover {
  color: var(--color-ink);
  background-color: var(--color-surface);
  border-color: var(--color-border);
  transform: translateY(-2px);
}

/* Contact Form */
.contact-right {
  background-color: var(--color-white);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  box-shadow: var(--shadow-sm);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-soft);
}

.form-input {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-white);
  color: var(--color-ink);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.form-input::placeholder {
  color: var(--color-ink-light);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-ink);
  box-shadow: 0 0 0 3px rgba(17,17,17,0.08);
}

.form-input.error {
  border-color: #cc0000;
  box-shadow: 0 0 0 3px rgba(204,0,0,0.08);
}

.form-select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23333333' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 16px;
  padding-right: 2.5rem;
}

.form-textarea {
  resize: vertical;
  min-height: 130px;
}

.form-error {
  font-size: var(--text-xs);
  color: #cc0000;
  font-weight: 500;
  min-height: 1em;
  display: block;
}

.form-success {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink);
}

.form-success svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  stroke: var(--color-ink);
}


/* ============================================================
   14. FOOTER
   ============================================================ */
.site-footer {
  background-color: var(--color-ink);
  color: rgba(255,255,255,0.7);
  padding-block: clamp(3rem, 6vw, 5rem) clamp(2rem, 4vw, 3rem);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: clamp(3rem, 6vw, 6rem);
  margin-bottom: var(--space-16);
  align-items: start;
}

/* Footer brand */
.footer-logo {
  color: var(--color-white);
}

.footer-logo .logo-text {
  color: var(--color-white);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  margin-top: var(--space-3);
  margin-bottom: var(--space-6);
}

/* Footer social icons */
.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social .social-icon {
  background-color: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.6);
}

.footer-social .social-icon:hover {
  background-color: rgba(255,255,255,0.14);
  color: var(--color-white);
  border-color: rgba(255,255,255,0.25);
}

/* Footer nav */
.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.footer-nav-heading {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  margin-bottom: var(--space-4);
}

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

.footer-nav a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  transition: color var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--color-white);
}

/* Footer bottom */
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
}

.footer-made {
  font-style: italic;
}


/* ============================================================
   15. ANIMATIONS
   ============================================================ */

/* Base fade-in state */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.65s ease,
    transform 0.65s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Delay variants */
.fade-in--delay-1 { transition-delay: 0.1s; }
.fade-in--delay-2 { transition-delay: 0.2s; }
.fade-in--delay-3 { transition-delay: 0.3s; }

/* Respect user preference for 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;
  }

  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .scroll-indicator {
    display: none;
  }
}


/* ============================================================
   16. RESPONSIVE
   ============================================================ */

/* Large tablet and below: 1024px */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
    row-gap: var(--space-8);
  }

  .process-steps::before {
    display: none;
  }

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

  .about-inner {
    grid-template-columns: 1fr;
  }

  .about-left {
    max-width: 640px;
  }

  .contact-inner {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
}

/* Tablet: 768px */
@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  /* Mobile nav */
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    flex-direction: column;
    padding: var(--space-6) var(--container-pad) var(--space-8);
    gap: 0;
    border-bottom: 1px solid var(--color-border-soft);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-slow), opacity var(--transition-slow);
    z-index: 800;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-link {
    display: block;
    padding: var(--space-4) 0;
    font-size: var(--text-md);
    border-bottom: 1px solid var(--color-border-soft);
  }

  .nav-link::after {
    display: none;
  }

  .nav-links li:last-child .nav-link {
    border-bottom: none;
  }

  /* Hero */
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
    order: 1;
  }

  .hero-illustration {
    order: 0;
    max-width: 380px;
    margin-inline: auto;
  }

  .hero-headline {
    font-size: clamp(2.2rem, 7vw, 3.5rem);
  }

  .hero-subheadline {
    margin-inline: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  /* Stats */
  .stats-list {
    gap: var(--space-4);
  }

  .stat-divider {
    display: none;
  }

  .stat-item {
    min-width: 100px;
  }

  /* Apps */
  .apps-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-inline: auto;
  }

  /* Process */
  .process-steps {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .process-step {
    flex-direction: row;
    text-align: left;
    align-items: flex-start;
    gap: var(--space-5);
  }

  .step-content {
    align-items: flex-start;
    text-align: left;
  }

  /* Testimonials */
  .testimonials-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin-inline: auto;
  }

  /* Footer */
  .footer-nav {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* Mobile: 480px */
@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-cta .btn {
    justify-content: center;
  }

  .stat-number {
    font-size: 1.75rem;
  }

  .app-store-links {
    flex-direction: column;
  }

  .about-inner {
    gap: var(--space-8);
  }

  .footer-nav {
    grid-template-columns: 1fr;
  }
}


/* ============================================================
   17. SERVICES & CATEGORIES SECTION
   ============================================================ */
.services {
  background-color: var(--color-white);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: clamp(1.25rem, 3vw, 2rem);
}

.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  padding: clamp(1.75rem, 3vw, 2.25rem);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border);
}

.service-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink);
}

.service-icon-box svg {
  width: 24px;
  height: 24px;
}

.service-title {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.service-description {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.7;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: var(--space-2);
}

/* ============================================================
   18. UPCOMING APPS SECTION
   ============================================================ */
.upcoming {
  background-color: var(--color-surface);
}

.upcoming-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: clamp(1.25rem, 3vw, 2rem);
}

.upcoming-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  padding: clamp(1.75rem, 3vw, 2.25rem);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: relative;
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
}

.upcoming-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border);
}

.upcoming-badge {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  background-color: var(--color-ink);
  color: var(--color-white);
}

.upcoming-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.upcoming-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
}

.upcoming-title {
  font-size: var(--text-lg);
  font-weight: 700;
}

.upcoming-desc {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.7;
}

.upcoming-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border-soft);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.02em;
}

/* ============================================================
   19. LEGAL PAGES (Privacy Policy, Terms of Service)
   ============================================================ */
.legal-page {
  padding-top: calc(var(--nav-height) + var(--space-12));
  padding-bottom: var(--space-24);
  background-color: var(--color-white);
}

.legal-header {
  max-width: 840px;
  margin-inline: auto;
  margin-bottom: var(--space-10);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-8);
}

.legal-header .section-title {
  margin-bottom: var(--space-3);
}

.legal-updated {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-light);
  letter-spacing: 0.04em;
  font-weight: 500;
}

.legal-content {
  max-width: 840px;
  margin-inline: auto;
  color: var(--color-ink-soft);
  line-height: 1.85;
}

.legal-content h2 {
  font-size: clamp(1.3rem, 2.5vw, 1.75rem);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  color: var(--color-ink);
  letter-spacing: -0.01em;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-soft);
}

.legal-content h2:first-of-type {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

.legal-content h3 {
  font-size: var(--text-md);
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
  color: var(--color-ink);
}

.legal-content p {
  margin-bottom: var(--space-4);
}

.legal-content ul,
.legal-content ol {
  margin-bottom: var(--space-5);
  padding-left: var(--space-6);
}

.legal-content ul {
  list-style: disc;
}

.legal-content ol {
  list-style: decimal;
}

.legal-content li {
  margin-bottom: var(--space-2);
}

.legal-content strong {
  color: var(--color-ink);
}

.legal-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  margin-block: var(--space-6);
}

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

.back-to-home {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: var(--space-6);
  transition: color var(--transition-fast);
}

.back-to-home:hover {
  text-decoration: underline;
}

/* ===================== FAQ ACCORDION ===================== */
.support-faq {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.support-faq-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-4);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-ink-soft);
}

.faq-item[open] {
  border-color: var(--color-ink);
  box-shadow: var(--shadow-xs);
}

.faq-question {
  padding: 14px 18px;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: '+';
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink-muted);
  transition: transform var(--transition-fast);
}

.faq-item[open] .faq-question::after {
  content: '−';
  color: var(--color-ink);
}

.faq-answer {
  padding: 0 18px 14px;
  font-size: 13px;
  line-height: var(--leading-relaxed);
  color: var(--color-ink-muted);
}