/* ===================================
   1. MODERN CSS RESET & BASE
   ================================== */

/* Custom CSS Reset based on Josh Comeau's Modern CSS Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  /* Better font rendering */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  /* Prevent font size inflation on mobile */
  -webkit-text-size-adjust: 100%;

  /* Enable smooth scrolling for skip links */
  scroll-behavior: smooth;
}

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

  /* Prevent horizontal scroll */
  overflow-x: hidden;
}

/* Improve media defaults */
img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Remove built-in form typography styles */
input,
button,
textarea,
select {
  font: inherit;
}

/* Avoid text overflows */
p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
  /* Better line breaking for CJK languages */
  line-break: auto;
}

/* Improve heading line heights */
h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.2;
  font-weight: var(--font-weight-bold);
}

/* Remove list styles where semantic lists are used for layout */
ul[role="list"],
ol[role="list"] {
  list-style: none;
  padding: 0;
}

/* ===================================
   2. DESIGN SYSTEM - CSS CUSTOM PROPERTIES
   ================================== */

:root {
  /* ===== COLOR SYSTEM ===== */
  /* Primary Colors */
  --color-primary-cyan: hsl(180, 66%, 49%);
  --color-primary-cyan-hover: hsl(180, 66%, 42%);
  --color-primary-dark-violet: hsl(257, 27%, 26%);

  /* Secondary Colors */
  --color-secondary-red: hsl(0, 87%, 67%);

  /* Neutral Colors */
  --color-neutral-gray-light: hsl(0, 0%, 75%);
  --color-neutral-gray: hsl(257, 7%, 63%);
  --color-neutral-gray-dark: hsl(255, 11%, 22%);
  --color-neutral-very-dark: hsl(260, 8%, 14%);

  /* Semantic Colors */
  --color-background: hsl(0, 0%, 100%);
  --color-background-alt: hsl(225, 33%, 95%);
  --color-text-primary: var(--color-neutral-gray-dark);
  --color-text-secondary: var(--color-neutral-gray);
  --color-text-light: hsl(0, 0%, 100%);
  --color-error: var(--color-secondary-red);
  --color-success: hsl(120, 60%, 50%);

  /* ===== TYPOGRAPHY SYSTEM ===== */
  --font-family-base: "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;

  --font-weight-normal: 500;
  --font-weight-bold: 700;

  /* Fluid Typography using clamp() for better responsive design */
  --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --font-size-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --font-size-3xl: clamp(2rem, 1.5rem + 2.5vw, 3rem);
  --font-size-4xl: clamp(2.5rem, 2rem + 2.5vw, 4rem);

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-loose: 1.8;

  /* ===== SPACING SYSTEM ===== */
  /* Using geometric progression for consistent spacing */
  --space-3xs: clamp(0.25rem, 0.2rem + 0.25vw, 0.375rem);
  --space-2xs: clamp(0.5rem, 0.4rem + 0.5vw, 0.75rem);
  --space-xs: clamp(0.75rem, 0.6rem + 0.75vw, 1.125rem);
  --space-sm: clamp(1rem, 0.8rem + 1vw, 1.5rem);
  --space-md: clamp(1.5rem, 1.2rem + 1.5vw, 2.25rem);
  --space-lg: clamp(2rem, 1.6rem + 2vw, 3rem);
  --space-xl: clamp(3rem, 2.4rem + 3vw, 4.5rem);
  --space-2xl: clamp(4rem, 3.2rem + 4vw, 6rem);
  --space-3xl: clamp(6rem, 4.8rem + 6vw, 9rem);

  /* ===== LAYOUT SYSTEM ===== */
  --container-max-width: 1200px;
  --container-padding: var(--space-sm);

  /* ===== BORDER & RADIUS ===== */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 1rem;
  --border-radius-full: 9999px;

  /* ===== SHADOWS ===== */
  --shadow-sm: 0 1px 2px 0 hsl(0 0% 0% / 0.05);
  --shadow-md: 0 4px 6px -1px hsl(0 0% 0% / 0.1),
    0 2px 4px -2px hsl(0 0% 0% / 0.1);
  --shadow-lg: 0 10px 15px -3px hsl(0 0% 0% / 0.1),
    0 4px 6px -4px hsl(0 0% 0% / 0.1);

  /* ===== TRANSITIONS ===== */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* ===== Z-INDEX SCALE ===== */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal: 400;
  --z-toast: 500;
}

/* ===================================
   3. UTILITY CLASSES
   ================================== */

/* Screen Reader Only - for accessibility */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background-color: var(--color-primary-dark-violet);
  color: var(--color-text-light);
  padding: var(--space-xs) var(--space-sm);
  text-decoration: none;
  border-radius: 0 0 var(--border-radius-md) 0;
  font-weight: var(--font-weight-bold);
  z-index: var(--z-toast);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* Container Utility */
.container {
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* ===================================
   4. COMPONENT STYLES
   ================================== */

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);

  font-weight: var(--font-weight-bold);
  text-decoration: none;
  text-align: center;
  white-space: nowrap;

  border: 2px solid transparent;
  border-radius: var(--border-radius-full);
  cursor: pointer;

  transition: all var(--transition-normal);

  /* Remove default button styles */
  background: none;
  font-family: inherit;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary-cyan);
  outline-offset: 2px;
}

/* Button Variants */
.btn--primary {
  background-color: var(--color-primary-cyan);
  color: var(--color-text-light);
}

.btn--primary:hover {
  background-color: var(--color-primary-cyan-hover);
  transform: translateY(-1px);
}

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

/* Button Sizes - Refined for wireframe accuracy */
.btn--small {
  padding: var(--space-3xs) var(--space-sm);
  font-size: var(--font-size-sm);
}

.btn--large {
  padding: var(--space-2xs) var(--space-md);
  font-size: var(--font-size-lg);
}

/* Default button size */
.btn {
  padding: var(--space-3xs) var(--space-sm);
  font-size: var(--font-size-base);
}

/* ===================================
   5. LAYOUT COMPONENTS
   ================================== */

/* ===== HEADER & NAVIGATION ===== */
.header {
  background-color: var(--color-background);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-sm);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-sm);
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.nav__logo {
  height: 2rem;
  width: auto;
}

/* Mobile Navigation Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2xs);
}

.nav__hamburger,
.nav__hamburger::before,
.nav__hamburger::after {
  width: 1.5rem;
  height: 2px;
  background-color: var(--color-neutral-gray);
  transition: var(--transition-fast);
}

.nav__hamburger {
  position: relative;
}

.nav__hamburger::before,
.nav__hamburger::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav__hamburger::before {
  top: -0.5rem;
}

.nav__hamburger::after {
  top: 0.5rem;
}

/* Navigation Menu */
.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav__link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: var(--font-weight-normal);
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-text-primary);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

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

/* ===== HERO SECTION ===== */
.hero {
  padding-block: var(--space-2xl);
  overflow: hidden; /* Prevent horizontal scroll from image */
}

.hero__container {
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);

  /* Mobile-first: single column layout */
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero__content {
  /* Ensure content comes first on mobile */
  order: 2;
  text-align: center;
}

.hero__image {
  /* Image comes second on mobile */
  order: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-sm);

  /* Better text rendering for large text */
  text-rendering: optimizeLegibility;
}

.hero__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
  margin-bottom: var(--space-lg);

  /* Limit line length for better readability */
  max-width: 50ch;
  margin-inline: auto;
}

.hero__illustration {
  width: 100%;
  height: auto;
  max-width: 500px;

  /* Add subtle animation */
  animation: float 6s ease-in-out infinite;
}

/* Floating animation for hero illustration */
@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* ===== URL SHORTENING SECTION ===== */
.shorten {
  background-color: var(--color-background-alt);
  padding-block: var(--space-xl);
  position: relative;
}

.shorten__container {
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.shorten__form {
  background: var(--color-primary-dark-violet)
    url("../images/bg-shorten-desktop.svg") no-repeat center;
  background-size: cover;
  padding: var(--space-lg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);

  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-md);
  align-items: center; /* Center align input and button */
}

.shorten__input-group {
  position: relative;
}

.shorten__input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 2px solid transparent;
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-base);
  background-color: var(--color-background);

  transition: border-color var(--transition-fast);
}

.shorten__input:focus {
  outline: none;
  border-color: var(--color-primary-cyan);
  box-shadow: 0 0 0 3px hsl(180 66% 49% / 0.1);
}

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

/* Error state */
.shorten__input:invalid,
.shorten__input[aria-invalid="true"] {
  border-color: var(--color-error);
}

.shorten__error {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: var(--space-2xs);
  font-size: var(--font-size-sm);
  color: var(--color-error);
  font-style: italic;

  /* Hidden by default */
  opacity: 0;
  transform: translateY(-0.5rem);
  transition: all var(--transition-fast);
}

.shorten__error:not(:empty) {
  opacity: 1;
  transform: translateY(0);
}

.shorten__submit {
  white-space: nowrap;
  min-width: max-content;

  /* Match input field styling */
  border-radius: var(--border-radius-md); /* Same as input, not full radius */
  padding: var(--space-sm) var(--space-md); /* Match input height exactly */
  font-size: var(--font-size-base); /* Match input font size */
}

.shorten__results {
  margin-top: var(--space-lg);
}

/* Individual result item styles */
.result-item {
  background-color: var(--color-background);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-sm);

  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: var(--space-sm);
  align-items: center;
  padding: var(--space-sm) var(--space-md);

  /* Smooth entry animation */
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-1rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-item__original {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-normal);
  word-break: break-all;
}

.result-item__shortened {
  color: var(--color-primary-cyan);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
}

.result-item__shortened:hover {
  text-decoration: underline;
}

.result-item__copy {
  font-size: var(--font-size-sm);
  padding: var(--space-2xs) var(--space-sm);
  min-width: max-content;
}

.result-item__copy--copied {
  background-color: var(--color-primary-dark-violet);
}

.result-item__demo {
  font-size: var(--font-size-xs);
  color: var(--color-neutral-gray);
  font-style: italic;
  margin-left: var(--space-2xs);
}

/* ===== STATISTICS SECTION ===== */
.stats {
  padding-block: var(--space-3xl);
  background-color: var(--color-background-alt);
  position: relative;
}

.stats__container {
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.stats__header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.stats__title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
  line-height: var(--line-height-tight);
}

.stats__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
  max-width: 50ch;
  margin-inline: auto;
}

/* Statistics Cards Layout - Mobile First */
.stats__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  position: relative;

  /* Default to single column on mobile */
  margin-top: var(--space-xl);
}

/* Create the connecting line using pseudo-element - hidden on mobile */
.stats__grid::before {
  content: "";
  position: absolute;
  /* Position line to go through center of first card and extend across */
  top: calc(44px + 140px); /* Icon margin + approximate card center */
  left: 0;
  right: 0;
  height: 8px;
  background-color: var(--color-primary-cyan);
  z-index: 1;
  display: none; /* Hidden on mobile */
}

.stats__card {
  background-color: var(--color-background);
  border-radius: var(--border-radius-lg);
  padding: calc(var(--space-xl) + 44px) var(--space-lg) var(--space-xl)
    var(--space-lg);
  box-shadow: var(--shadow-md);
  position: relative;
  z-index: 2;
  text-align: left;

  /* Add top margin to account for overflowing icon */
  margin-top: 44px;

  /* Ensure cards have consistent minimum height */
  min-height: 280px;

  /* Smooth hover effects */
  transition: all var(--transition-normal);

  /* Animation for cards appearing */
  opacity: 0;
  transform: translateY(2rem);
  animation: cardSlideIn 0.6s ease-out forwards;
} /* Staggered animation delays */
.stats__card:nth-child(1) {
  animation-delay: 0.1s;
}

.stats__card:nth-child(2) {
  animation-delay: 0.2s;
}

.stats__card:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes cardSlideIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.stats__card:hover {
  transform: translateY(-0.5rem);
  box-shadow: var(--shadow-lg);
}

.stats__icon {
  width: 88px;
  height: 88px;
  background-color: var(--color-primary-dark-violet);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;

  /* Position absolutely to create proper overflow effect */
  position: absolute;
  top: -44px; /* Half the height of the icon to center it on the border */
  left: var(--space-lg); /* Align with card padding */

  /* Ensure icon is above card content */
  z-index: 3;

  /* Subtle gradient to match design */
  background: linear-gradient(
    135deg,
    var(--color-primary-dark-violet),
    hsl(257, 27%, 35%)
  );
}
.stats__icon-img {
  width: 40px;
  height: 40px;
  filter: brightness(0) invert(1); /* Make SVG white */
}

.stats__card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
  line-height: var(--line-height-tight);
}

.stats__card-description {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
}

/* ===== CALL TO ACTION SECTION ===== */
.cta {
  background: var(--color-primary-dark-violet)
    url("../images/bg-boost-desktop.svg") no-repeat center;
  background-size: cover;
  padding-block: var(--space-2xl);
  text-align: center;
  color: var(--color-text-light);
}

.cta__container {
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.cta__title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-lg);
  line-height: var(--line-height-tight);
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--color-neutral-very-dark);
  color: var(--color-text-light);
  padding-block: var(--space-2xl);
}

.footer__container {
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);

  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);

  /* Desktop layout */
  grid-template-columns: 2fr repeat(3, 1fr) auto;
  align-items: start;
}

.footer__logo {
  height: 2rem;
  width: auto;
  filter: brightness(0) invert(1); /* Make logo white */
}

.footer__nav {
  display: contents; /* Allow direct children to participate in parent grid */
}

.footer__column {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__heading {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-light);
  margin-bottom: var(--space-xs);
}

.footer__links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
}

.footer__link {
  color: var(--color-neutral-gray);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-primary-cyan);
}

.footer__social {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__social-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: var(--space-sm);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast);
}

.footer__social-link:hover {
  transform: scale(1.1);
}

.footer__social-icon {
  width: 24px;
  height: 24px;
  transition: filter var(--transition-fast);
}

.footer__social-link:hover .footer__social-icon {
  filter: brightness(0) saturate(100%) invert(70%) sepia(98%) saturate(2618%)
    hue-rotate(155deg) brightness(91%) contrast(83%);
}

/* Attribution */
.attribution {
  background-color: var(--color-neutral-very-dark);
  color: var(--color-neutral-gray);
  text-align: center;
  padding: var(--space-sm);
  font-size: var(--font-size-xs);
  border-top: 1px solid var(--color-neutral-gray-dark);
  margin-top: var(--space-sm);
}

.attribution a {
  color: var(--color-primary-cyan);
  text-decoration: none;
}

.attribution a:hover {
  text-decoration: underline;
}

/* ===================================
   6. RESPONSIVE DESIGN
   ================================== */

/* Desktop-first responsive design */
@media (min-width: 48rem) {
  /* Hero Section - Desktop Layout */
  .hero__container {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    text-align: left;
  }

  .hero__content {
    order: 1; /* Content first on desktop */
    text-align: left;
  }

  .hero__image {
    order: 2; /* Image second on desktop */
    justify-content: flex-end;
  }

  .hero__description {
    margin-inline: 0; /* Remove auto centering on desktop */
  }

  .hero__illustration {
    /* Extend beyond container for visual effect */
    transform: translateX(10%);
    max-width: 600px;
  }

  /* URL Shortening Form - Desktop Layout */
  .shorten__form {
    background-image: url("../images/bg-shorten-desktop.svg");
  }

  /* Statistics Section - Desktop Layout */
  .stats__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    max-width: 1200px;
    margin-inline: auto;
  }

  /* Show connecting line on desktop */
  .stats__grid::before {
    display: block;
    /* Position line to go behind the staggered cards at a balanced height */
    top: 170px; /* Height that looks balanced with staggered cards */
    left: 3rem;
    right: 3rem;
    /* Remove any transforms for clean horizontal line */
    transform: none;
  }

  /* Staggered layout exactly like wireframe */
  .stats__card:nth-child(1) {
    margin-top: 44px; /* Base margin for icon overflow */
  }

  .stats__card:nth-child(2) {
    margin-top: calc(44px + var(--space-lg)); /* Icon margin + stagger offset */
  }

  .stats__card:nth-child(3) {
    margin-top: calc(
      44px + var(--space-lg) * 2
    ); /* Icon margin + larger stagger */
  }

  /* Maintain hover effects with proper offsets */
  .stats__card:hover {
    transform: translateY(-0.5rem);
  }

  /* CTA Section - Desktop Layout */
  .cta {
    background-image: url("../images/bg-boost-desktop.svg");
  }
}

/* Mobile Navigation and Mobile-specific styles */
@media (max-width: 48rem) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-primary-dark-violet);
    flex-direction: column;
    gap: var(--space-sm);
    padding: var(--space-lg);
    margin: var(--space-sm);
    border-radius: var(--border-radius-lg);

    /* Hidden by default */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-1rem);
    transition: all var(--transition-normal);
  }

  .nav__menu[aria-expanded="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav__links {
    flex-direction: column;
    gap: var(--space-sm);
    width: 100%;
  }

  .nav__link {
    color: var(--color-text-light);
    font-weight: var(--font-weight-bold);
    text-align: center;
    padding: var(--space-xs);
  }

  .nav__actions {
    flex-direction: column;
    width: 100%;
    gap: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-neutral-gray);
  }

  .nav__link--login {
    color: var(--color-text-light);
  }

  .btn--small {
    width: 100%;
  }

  /* Hero Section - Mobile Layout */
  .hero {
    padding-block: var(--space-xl);
    text-align: center;
  }

  .hero__container {
    gap: var(--space-lg);
    grid-template-columns: 1fr; /* Ensure single column on mobile */
  }

  .hero__content {
    order: 2; /* Content below image on mobile */
    text-align: center;
  }

  .hero__image {
    order: 1; /* Image above content on mobile */
    justify-content: center;
  }

  .hero__title {
    font-size: var(--font-size-3xl);
    text-align: center;
  }

  .hero__description {
    text-align: center;
    margin-inline: auto; /* Center the description text */
  }

  .hero__illustration {
    transform: none; /* Remove desktop transform on mobile */
    max-width: 100%;
  }

  /* URL Shortening Form - Mobile Layout */
  .shorten__form {
    background-image: url("../images/bg-shorten-mobile.svg");
    grid-template-columns: 1fr;
    gap: var(--space-sm);
    padding: var(--space-md);
  }

  .shorten__submit {
    width: 100%;
  }

  /* Result items stack on mobile */
  .result-item {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
    text-align: center;
  }

  .result-item__copy {
    width: 100%;
  }

  /* Statistics Section - Mobile Layout */
  .stats {
    padding-block: var(--space-2xl);
  }

  .stats__grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .stats__title {
    font-size: var(--font-size-2xl);
  }

  /* Reset card positions on mobile - no staggering needed but keep icon margin */
  .stats__card:nth-child(1),
  .stats__card:nth-child(2),
  .stats__card:nth-child(3) {
    margin-top: 44px; /* Keep margin for icon overflow only */
  }

  /* Consistent hover behavior on mobile */
  .stats__card:hover {
    transform: translateY(-0.5rem);
  }

  /* CTA Section - Mobile Layout */
  .cta {
    background-image: url("../images/bg-boost-mobile.svg");
    padding-block: var(--space-xl);
  }

  .cta__title {
    font-size: var(--font-size-2xl);
  }

  /* Footer - Mobile Layout */
  .footer__container {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    text-align: center;
  }

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

/* ===================================
   7. PRINT STYLES
   ================================== */

@media print {
  .nav__toggle,
  .skip-link {
    display: none;
  }

  * {
    color: black !important;
    background: white !important;
  }
}

/* ===================================
   8. REDUCED MOTION SUPPORT
   ================================== */

@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;
  }

  .skip-link {
    transition: none;
  }
}