/* ==========================================================================
   MixStūra — Video Downloader & Stream Muxer
   Product Landing Page Stylesheet
   ========================================================================== */

/* ==========================================================================
   1. CSS Custom Properties / Design Tokens
   ========================================================================== */
:root {
  /*========== Colors ==========*/
  /* Color mode HSL */
  --hue: 142;

  --first-color: hsl(var(--hue), 76%, 50%);
  --first-color-alt: hsl(var(--hue), 76%, 42%);
  --first-color-light: hsla(var(--hue), 76%, 50%, 0.12);
  --first-color-glow: hsla(var(--hue), 76%, 50%, 0.28);
  --first-color-subtle: hsla(var(--hue), 76%, 50%, 0.05);

  /* Multi-stream brand identity colors */
  --stream-blue: hsl(210, 100%, 56%);
  --stream-purple: hsl(276, 88%, 60%);
  --stream-orange: hsl(28, 98%, 52%);
  --stream-green: hsl(var(--hue), 76%, 50%);

  --gradient-color:
    linear-gradient(
      90deg,
      hsl(var(--hue), 76%, 50%) 0%,
      hsl(160, 85%, 68%) 40%,
      hsl(160, 85%, 68%) 60%,
      hsl(var(--hue), 76%, 50%) 100%
    );

  --gradient-brand:
    linear-gradient(
      135deg,
      hsl(210, 100%, 56%) 0%,
      hsl(276, 88%, 60%) 35%,
      hsl(28, 98%, 52%) 70%,
      hsl(var(--hue), 76%, 50%) 100%
    );

  --white-color: hsl(210, 20%, 98%);
  --black-color: hsl(220, 20%, 6%);
  --text-color: hsl(215, 12%, 72%);
  --text-color-light: hsl(215, 18%, 88%);
  --body-color: hsl(220, 20%, 5%);
  --container-color: hsl(220, 16%, 9%);
  --border-color: hsl(220, 12%, 18%);

  /* Semantic & Derived Color Tokens */
  --muted-color: hsl(215, 10%, 52%);
  --surface-hover-color: hsl(220, 16%, 13%);
  --surface-active-color: hsl(220, 16%, 16%);
  --shadow-color: hsla(0, 0%, 0%, 0.6);
  --success-color: hsl(var(--hue), 76%, 50%);
  --warning-color: hsl(38, 96%, 54%);
  --danger-color: hsl(0, 75%, 60%);

  /*========== Typography ==========*/
  --body-font: "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --second-font: "Syne", -apple-system, BlinkMacSystemFont, sans-serif;
  --code-font: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --font-regular: 400;
  --font-medium: 500;
  --font-semi-bold: 600;
  --font-bold: 700;
  --font-extra-bold: 800;

  /* Responsive Fluid Typography Scale */
  --biggest-font-size: clamp(2.125rem, 5vw + 1rem, 3.5rem);
  --bigger-font-size: clamp(1.75rem, 3vw + 0.8rem, 2.5rem);
  --h1-font-size: clamp(1.5rem, 2.2vw + 0.8rem, 2rem);
  --h2-font-size: clamp(1.25rem, 1.5vw + 0.8rem, 1.625rem);
  --h3-font-size: 1.125rem;
  --normal-font-size: 0.938rem;
  --small-font-size: 0.813rem;
  --smaller-font-size: 0.75rem;

  --line-height-tight: 1.15;
  --line-height-heading: 1.25;
  --line-height-base: 1.6;

  /*========== Spacing System ==========*/
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.5rem;    /* 24px */
  --space-6: 2rem;      /* 32px */
  --space-7: 3rem;      /* 48px */
  --space-8: 4.5rem;    /* 72px */
  --space-9: 6rem;      /* 96px */

  /*========== Radii & Borders ==========*/
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /*========== Shadows ==========*/
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px var(--first-color-glow);

  /*========== Transitions ==========*/
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);

  /*========== Layout ==========*/
  --header-height: 4.25rem;
  --container-max-width: 1140px;
}

/* ==========================================================================
   2. Reset & Base Styles
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--body-font);
  font-size: var(--normal-font-size);
  font-weight: var(--font-regular);
  line-height: var(--line-height-base);
  background-color: var(--body-color);
  color: var(--text-color);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.menu-open {
  overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--second-font);
  color: var(--white-color);
  line-height: var(--line-height-heading);
  font-weight: var(--font-bold);
}

p {
  color: var(--text-color);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

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

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

/* Focus Visible Accessibility */
:focus-visible {
  outline: 2px solid var(--first-color);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   3. Layout & Containers
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-6);
  }
}

.section {
  padding-block: var(--space-7);
  position: relative;
}

@media (min-width: 1024px) {
  .section {
    padding-block: var(--space-8);
  }
}

.section__header {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .section__header {
    margin-bottom: var(--space-7);
  }
}

.section__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--second-font);
  font-size: var(--smaller-font-size);
  font-weight: var(--font-bold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--first-color);
  margin-bottom: var(--space-2);
}

.section__title {
  font-size: var(--bigger-font-size);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

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

/* Gradient Text Utility */
.gradient-text {
  background: var(--gradient-color);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

/* ==========================================================================
   4. Buttons & Badges
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.35rem;
  font-family: var(--body-font);
  font-size: var(--normal-font-size);
  font-weight: var(--font-semi-bold);
  line-height: 1;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
  min-height: 44px;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background-color: var(--first-color);
  color: var(--body-color);
  font-weight: var(--font-bold);
  box-shadow: 0 4px 14px var(--first-color-glow);
}

.btn--primary:hover {
  background-color: hsl(var(--hue), 76%, 56%);
  box-shadow: 0 6px 20px hsla(var(--hue), 76%, 50%, 0.45);
}

.btn--secondary {
  background-color: var(--container-color);
  color: var(--white-color);
  border: 1px solid var(--border-color);
}

.btn--secondary:hover {
  background-color: var(--surface-hover-color);
  border-color: hsl(220, 14%, 26%);
  color: var(--white-color);
}

.btn--outline {
  background-color: transparent;
  color: var(--first-color);
  border: 1px solid var(--first-color);
}

.btn--outline:hover {
  background-color: var(--first-color-light);
}

.btn--sm {
  padding: 0.5rem 0.875rem;
  font-size: var(--small-font-size);
  border-radius: var(--radius-sm);
  min-height: 36px;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  font-size: var(--smaller-font-size);
  font-weight: var(--font-semi-bold);
  border-radius: var(--radius-full);
  line-height: 1;
  letter-spacing: 0.04em;
}

.badge--beta {
  background-color: var(--first-color-light);
  color: var(--first-color);
  border: 1px solid hsla(var(--hue), 76%, 50%, 0.3);
  text-transform: uppercase;
}

.badge--dot::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: currentColor;
}

.badge--muted {
  background-color: hsla(220, 16%, 16%, 0.5);
  color: var(--muted-color);
  border: 1px solid var(--border-color);
}

/* ==========================================================================
   5. Header & Navigation
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 100;
  background-color: hsla(220, 20%, 5%, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-normal), background-color var(--transition-normal);
}

.header.is-scrolled {
  background-color: hsla(220, 20%, 5%, 0.94);
  border-bottom-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

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

.nav__logo {
  font-family: var(--second-font);
  font-size: 1.35rem;
  font-weight: var(--font-bold);
  color: var(--white-color);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.nav__logo-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 8px hsla(var(--hue), 76%, 50%, 0.25));
  transition: transform var(--transition-normal), filter var(--transition-normal);
}

.nav__logo:hover .nav__logo-img {
  transform: scale(1.08) rotate(5deg);
  filter: drop-shadow(0 4px 14px hsla(var(--hue), 76%, 50%, 0.45));
}

.nav__menu {
  position: fixed;
  top: var(--header-height);
  right: -100%;
  width: min(85vw, 340px);
  height: calc(100vh - var(--header-height));
  background-color: var(--container-color);
  border-left: 1px solid var(--border-color);
  padding: var(--space-6) var(--space-5);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: right var(--transition-slow);
  z-index: 101;
  box-shadow: var(--shadow-lg);
  overflow-y: auto;
}

.nav__menu.is-open {
  right: 0;
}

.nav__backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.nav__backdrop.is-visible {
  opacity: 1;
  visibility: visible;
}

.nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.nav__link {
  font-family: var(--body-font);
  font-size: 1rem;
  font-weight: var(--font-medium);
  color: var(--text-color);
  padding: var(--space-2) 0;
  display: flex;
  align-items: center;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--first-color);
  padding-left: var(--space-2);
}

.nav__actions-mobile {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  gap: 5px;
  cursor: pointer;
}

.nav__toggle-bar {
  width: 20px;
  height: 2px;
  background-color: var(--white-color);
  border-radius: var(--radius-full);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav__actions-desktop {
  display: none;
}

@media (min-width: 900px) {
  .nav__toggle {
    display: none;
  }

  .nav__menu {
    position: static;
    width: auto;
    height: auto;
    background-color: transparent;
    border: none;
    padding: 0;
    flex-direction: row;
    align-items: center;
    box-shadow: none;
    overflow: visible;
  }

  .nav__list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-5);
  }

  .nav__link {
    font-size: var(--normal-font-size);
    padding: var(--space-2) 0;
  }

  .nav__link:hover,
  .nav__link.is-active {
    padding-left: 0;
  }

  .nav__actions-mobile {
    display: none;
  }

  .nav__actions-desktop {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-left: var(--space-5);
  }
}

/* ==========================================================================
   6. Hero Section
   ========================================================================== */
.hero {
  padding-top: var(--space-6);
  padding-bottom: var(--space-8);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -160px;
  left: 50%;
  transform: translateX(-50%);
  width: min(92vw, 880px);
  height: 650px;
  background:
    radial-gradient(ellipse at 30% 35%, hsla(210, 100%, 56%, 0.09) 0%, transparent 55%),
    radial-gradient(ellipse at 70% 30%, hsla(276, 88%, 60%, 0.08) 0%, transparent 55%),
    radial-gradient(circle at 50% 55%, hsla(var(--hue), 76%, 50%, 0.12) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
}

.hero__container {
  display: grid;
  gap: var(--space-7);
  position: relative;
  z-index: 1;
}

@media (min-width: 1024px) {
  .hero__container {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: var(--space-7);
  }
}

.hero__content {
  text-align: left;
}

.hero__eyebrow {
  margin-bottom: var(--space-3);
}

.hero__title {
  font-size: var(--biggest-font-size);
  font-weight: var(--font-extra-bold);
  letter-spacing: -0.03em;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-2);
}

.hero__subtitle {
  font-size: var(--h2-font-size);
  font-weight: var(--font-semi-bold);
  color: var(--first-color);
  margin-bottom: var(--space-4);
}

.hero__desc {
  font-size: 1.05rem;
  color: var(--text-color);
  line-height: var(--line-height-base);
  margin-bottom: var(--space-6);
  max-width: 540px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.hero__note {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--small-font-size);
  color: var(--muted-color);
}

.hero__note-icon {
  width: 16px;
  height: 16px;
  color: var(--first-color);
  flex-shrink: 0;
}

/* ==========================================================================
   7. Product Visual Mockup (Browser Extension UI)
   ========================================================================== */
.hero__mockup-wrapper {
  position: relative;
  width: 100%;
  max-width: 480px;
  margin-inline: auto;
}

.mockup-window {
  background-color: var(--black-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  overflow: hidden;
  position: relative;
}

.mockup-window__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background-color: var(--container-color);
  border-bottom: 1px solid var(--border-color);
}

.mockup-window__controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.mockup-window__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: hsl(220, 14%, 20%);
}

.mockup-window__dot:nth-child(1) { background-color: #ef4444; }
.mockup-window__dot:nth-child(2) { background-color: #f59e0b; }
.mockup-window__dot:nth-child(3) { background-color: #10b981; }

.mockup-window__title {
  font-family: var(--second-font);
  font-size: var(--small-font-size);
  font-weight: var(--font-semi-bold);
  color: var(--white-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mockup-window__icon {
  width: 18px;
  height: 18px;
  object-fit: contain;
  flex-shrink: 0;
}

.mockup-window__version {
  font-size: var(--smaller-font-size);
  color: var(--first-color);
  background: var(--first-color-light);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--code-font);
}

.mockup-window__body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.mockup-bar {
  background-color: hsl(220, 16%, 12%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.625rem 0.875rem;
}

.mockup-bar__label {
  font-size: var(--smaller-font-size);
  color: var(--muted-color);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
  display: block;
}

.mockup-bar__value {
  font-family: var(--code-font);
  font-size: var(--small-font-size);
  color: var(--text-color-light);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
}

.mockup-section-title {
  font-size: var(--small-font-size);
  font-weight: var(--font-semi-bold);
  color: var(--text-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mockup-section-count {
  font-size: var(--smaller-font-size);
  color: var(--first-color);
  font-family: var(--code-font);
}

.mockup-stream-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mockup-stream-item {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.625rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: border-color var(--transition-fast);
}

.mockup-stream-item.is-selected {
  border-color: var(--first-color);
  background-color: var(--first-color-subtle);
}

.mockup-stream-info {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.mockup-quality-tag {
  font-family: var(--second-font);
  font-weight: var(--font-bold);
  font-size: var(--small-font-size);
  color: var(--white-color);
  background-color: hsl(220, 16%, 15%);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.mockup-stream-item.is-selected .mockup-quality-tag {
  background-color: var(--first-color);
  color: var(--body-color);
}

.mockup-stream-meta {
  display: flex;
  flex-direction: column;
}

.mockup-stream-type {
  font-size: var(--small-font-size);
  color: var(--white-color);
  font-weight: var(--font-medium);
}

.mockup-stream-codecs {
  font-size: var(--smaller-font-size);
  color: var(--muted-color);
  font-family: var(--code-font);
}

.mockup-status-badge {
  font-size: var(--smaller-font-size);
  font-family: var(--body-font);
  font-weight: var(--font-medium);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.mockup-status-badge--ready {
  color: var(--first-color);
  background-color: var(--first-color-light);
  border: 1px solid hsla(var(--hue), 76%, 50%, 0.2);
}

.mockup-status-badge--muxing {
  color: var(--warning-color);
  background-color: hsla(38, 96%, 54%, 0.12);
  border: 1px solid hsla(38, 96%, 54%, 0.25);
  display: flex;
  align-items: center;
  gap: 4px;
}

.mockup-progress-box {
  background-color: hsl(220, 16%, 12%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.mockup-progress-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--smaller-font-size);
}

.mockup-progress-label {
  color: var(--text-color);
  font-weight: var(--font-medium);
}

.mockup-progress-val {
  color: var(--first-color);
  font-family: var(--code-font);
  font-weight: var(--font-semi-bold);
}

.mockup-progress-track {
  width: 100%;
  height: 6px;
  background-color: hsl(220, 14%, 18%);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.mockup-progress-fill {
  width: 78%;
  height: 100%;
  background: var(--gradient-color);
  border-radius: var(--radius-full);
}

.mockup-action-bar {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.mockup-btn {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: var(--small-font-size);
  font-weight: var(--font-semi-bold);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
}

.mockup-btn--primary {
  background-color: var(--first-color);
  color: var(--body-color);
}

.mockup-btn--secondary {
  background-color: hsl(220, 16%, 14%);
  color: var(--text-color-light);
  border: 1px solid var(--border-color);
}

/* ==========================================================================
   8. Features Section
   ========================================================================== */
.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
  }
}

@media (min-width: 1024px) {
  .features__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: hsla(var(--hue), 76%, 50%, 0.4);
  box-shadow: var(--shadow-md);
}

.feature-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--first-color-light);
  border: 1px solid hsla(var(--hue), 76%, 50%, 0.2);
  color: var(--first-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.feature-card__icon svg {
  width: 22px;
  height: 22px;
}

.feature-card__title {
  font-size: var(--h3-font-size);
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.feature-card__desc {
  font-size: var(--normal-font-size);
  color: var(--text-color);
  line-height: var(--line-height-base);
}

/* ==========================================================================
   9. How It Works / Workflow Section
   ========================================================================== */
.workflow__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  position: relative;
}

@media (min-width: 640px) {
  .workflow__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
  }
}

@media (min-width: 1024px) {
  .workflow__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.workflow-card {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.workflow-card:hover {
  transform: translateY(-3px);
  border-color: hsla(var(--hue), 76%, 50%, 0.35);
}

.workflow-card__step {
  font-family: var(--code-font);
  font-size: var(--small-font-size);
  font-weight: var(--font-bold);
  color: var(--first-color);
  margin-bottom: var(--space-3);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.workflow-card__step::after {
  content: "";
  height: 1px;
  flex: 1;
  background: linear-gradient(90deg, hsla(var(--hue), 76%, 50%, 0.4), transparent);
}

.workflow-card__title {
  font-size: var(--h3-font-size);
  margin-bottom: var(--space-2);
}

.workflow-card__desc {
  font-size: var(--normal-font-size);
  color: var(--text-color);
  line-height: var(--line-height-base);
}

/* ==========================================================================
   10. Open Beta Section
   ========================================================================== */
.beta__card {
  background: linear-gradient(180deg, hsl(220, 16%, 12%) 0%, var(--container-color) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-5);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

@media (min-width: 768px) {
  .beta__card {
    padding: var(--space-7) var(--space-6);
  }
}

.beta__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 2px;
  background: var(--gradient-color);
}

.beta__badge-wrapper {
  margin-bottom: var(--space-3);
}

.beta__title {
  font-size: var(--bigger-font-size);
  margin-bottom: var(--space-3);
}

.beta__desc {
  font-size: 1.05rem;
  color: var(--text-color);
  max-width: 660px;
  margin-inline: auto;
  line-height: var(--line-height-base);
  margin-bottom: var(--space-6);
}

.beta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
}

/* ==========================================================================
   11. Browser Support Section
   ========================================================================== */
.browsers__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  max-width: 740px;
  margin-inline: auto;
}

@media (min-width: 640px) {
  .browsers__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
  }
}

.browser-card {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.browser-card:hover {
  transform: translateY(-3px);
  border-color: hsla(var(--hue), 76%, 50%, 0.35);
}

.browser-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.browser-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: hsl(220, 16%, 13%);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.browser-card__icon svg {
  width: 24px;
  height: 24px;
}

.browser-card__title {
  font-size: var(--h3-font-size);
  margin-bottom: 2px;
}

.browser-card__meta {
  font-size: var(--smaller-font-size);
  color: var(--muted-color);
}

.browser-card__status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-color);
}

/* ==========================================================================
   12. Feedback / Community Section
   ========================================================================== */
.feedback__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .feedback__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
  }
}

.feedback-card {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-4);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.feedback-card:hover {
  transform: translateY(-3px);
  border-color: hsla(var(--hue), 76%, 50%, 0.4);
  box-shadow: var(--shadow-md);
}

.feedback-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.feedback-card__emoji {
  font-size: 1.5rem;
  line-height: 1;
}

.feedback-card__title {
  font-size: var(--h3-font-size);
}

.feedback-card__desc {
  font-size: var(--normal-font-size);
  color: var(--text-color);
  line-height: var(--line-height-base);
  flex-grow: 1;
}

.feedback-card__action {
  margin-top: auto;
}

/* ==========================================================================
   13. FAQ Section
   ========================================================================== */
.faq__list {
  max-width: 760px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq__item {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq__item:hover {
  border-color: hsl(220, 14%, 26%);
}

.faq__item[open] {
  border-color: hsla(var(--hue), 76%, 50%, 0.35);
}

.faq__summary {
  padding: 1.125rem var(--space-4);
  font-family: var(--second-font);
  font-size: 1rem;
  font-weight: var(--font-semi-bold);
  color: var(--white-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  user-select: none;
  list-style: none; /* remove native arrow */
}

.faq__summary::-webkit-details-marker {
  display: none;
}

.faq__chevron {
  width: 18px;
  height: 18px;
  color: var(--first-color);
  flex-shrink: 0;
  transition: transform var(--transition-normal);
}

.faq__item[open] .faq__chevron {
  transform: rotate(180deg);
}

.faq__content {
  padding: 0 var(--space-4) 1.25rem var(--space-4);
  font-size: var(--normal-font-size);
  color: var(--text-color);
  line-height: var(--line-height-base);
}

.faq__content p + p {
  margin-top: var(--space-2);
}

.faq__content a {
  color: var(--first-color);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ==========================================================================
   14. Footer
   ========================================================================== */
.footer {
  margin-top: auto;
  background-color: var(--black-color);
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-7);
  padding-bottom: var(--space-6);
}

.footer__top {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .footer__top {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
  }
}

.footer__brand {
  max-width: 320px;
}

.footer__logo {
  font-family: var(--second-font);
  font-size: 1.35rem;
  font-weight: var(--font-bold);
  color: var(--white-color);
  margin-bottom: var(--space-1);
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.footer__logo-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 8px hsla(var(--hue), 76%, 50%, 0.25));
}

.footer__subtitle {
  font-size: var(--small-font-size);
  color: var(--muted-color);
}

.footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-6);
}

.footer__link {
  font-size: var(--small-font-size);
  color: var(--text-color);
  transition: color var(--transition-fast);
}

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

.footer__link--placeholder {
  color: var(--muted-color);
  cursor: default;
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-5);
  border-top: 1px solid hsla(220, 14%, 20%, 0.6);
  font-size: var(--smaller-font-size);
  color: var(--muted-color);
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer__copy {
  font-family: var(--body-font);
}

.footer__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ==========================================================================
   15. Accessibility & 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;
  }
}