/* ==========================================================================
   Synapse Download Portal — Styles
   Brand: Fownd/Notation — Deep Forest Green, Warm Beige, Muted Teal
   ========================================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Primary brand colors */
  --deep-green: #1F3D3B;
  --deep-green-rgb: 31, 61, 59;
  --warm-beige: #CFCBBA;
  --warm-beige-rgb: 207, 203, 186;
  --muted-teal: #5C91A4;
  --muted-teal-rgb: 92, 145, 164;
  --muted-teal-a11y: #4A7A8C; /* Darkened teal for WCAG AA on white (4.72:1) */

  /* Secondary brand colors */
  --brand-blue: #439CCB;
  --olive-green: #495B25;
  --light-gray: #ECEFF1;
  --light-gray-rgb: 236, 239, 241;

  /* Functional */
  --white: #FFFFFF;
  --text-dark: #1a2e2c;
  --text-body: #3d4f4d;
  --text-muted: #5f706e;
  --text-on-dark: #FFFFFF;
  --text-on-dark-muted: rgba(207, 203, 186, 0.8);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Typography */
  --font-heading: 'Baloo Bhaina 2', cursive;
  --font-body: 'Lato', sans-serif;
  --font-ui: 'Inter', sans-serif;

  /* Sizing */
  --max-width: 1140px;
  --nav-height: 64px;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;
  --border-radius-pill: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(31, 61, 59, 0.08);
  --shadow-md: 0 4px 12px rgba(31, 61, 59, 0.1);
  --shadow-lg: 0 8px 30px rgba(31, 61, 59, 0.12);
  --shadow-xl: 0 16px 48px rgba(31, 61, 59, 0.16);

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

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

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-body);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--muted-teal-a11y);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--deep-green);
}

a:focus-visible {
  outline: 2px solid var(--muted-teal);
  outline-offset: 2px;
  border-radius: 2px;
}

button:focus-visible {
  outline: 2px solid var(--muted-teal);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--text-dark);
  line-height: 1.2;
  font-weight: 700;
}

/* ---------- Utility ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -100%;
  left: 0;
  z-index: 999;
  padding: 0.75rem 1.5rem;
  background: var(--deep-green);
  color: var(--white);
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  border-radius: 0 0 var(--border-radius-sm) 0;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--warm-beige);
  outline-offset: 2px;
}

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(31, 61, 59, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(207, 203, 186, 0.12);
  transition: background var(--transition-base);
}

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

.navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--white);
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
}

.navbar__brand:hover {
  color: var(--warm-beige);
}

.navbar__logo {
  height: 36px;
  width: 36px;
  object-fit: contain;
  border-radius: 6px;
}

.navbar__wordmark {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.navbar__link {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius-sm);
}

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

.navbar__link:focus-visible {
  outline: 2px solid var(--warm-beige);
  outline-offset: 2px;
}

/* Mobile hamburger */
.navbar__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  color: var(--white);
}

.navbar__toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: background var(--transition-fast);
}

.navbar__toggle-icon::before,
.navbar__toggle-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform var(--transition-fast);
}

.navbar__toggle-icon::before { top: -7px; }
.navbar__toggle-icon::after { top: 7px; }

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--deep-green);
  overflow: hidden;
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-4xl);
}

/* Subtle gradient overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(92, 145, 164, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(207, 203, 186, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 80%, rgba(92, 145, 164, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

/* Decorative background pattern (abstract cross/F motif) */
.hero::after {
  content: '';
  position: absolute;
  right: -5%;
  top: 10%;
  width: 500px;
  height: 500px;
  opacity: 0.04;
  background-image:
    linear-gradient(var(--warm-beige) 2px, transparent 2px),
    linear-gradient(90deg, var(--warm-beige) 2px, transparent 2px);
  background-size: 40px 40px;
  border-radius: 50%;
  transform: rotate(15deg);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero__logo {
  width: 140px;
  height: 140px;
  margin-bottom: var(--space-lg);
  /* White glow so the teal icon pops against the teal-green hero gradient */
  filter: drop-shadow(0 0 24px rgba(255, 255, 255, 0.5))
          drop-shadow(0 0 8px rgba(255, 255, 255, 0.3));
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
  border-radius: 50%;
  padding: 8px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  background: rgba(207, 203, 186, 0.15);
  border: 1px solid rgba(207, 203, 186, 0.3);
  border-radius: var(--border-radius-pill);
  color: var(--warm-beige);
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: var(--space-xl);
  letter-spacing: 0.02em;
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--warm-beige);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}

.hero__title-accent {
  color: var(--warm-beige);
}

.hero__subtitle {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--text-on-dark-muted);
  line-height: 1.7;
  margin-bottom: var(--space-2xl);
  max-width: 560px;
  font-weight: 300;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.9375rem;
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
}

.btn--primary {
  padding: 0.875rem 2rem;
  background: var(--warm-beige);
  color: var(--deep-green);
  font-size: 1rem;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 8px rgba(207, 203, 186, 0.3);
}

.btn--primary:hover {
  background: #ddd9ca;
  color: var(--deep-green);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(207, 203, 186, 0.4);
}

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

.btn--secondary {
  padding: 0.75rem 1.5rem;
  background: transparent;
  color: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--border-radius);
}

.btn--secondary:hover {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.05);
}

.btn__icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn--copy {
  padding: 0.375rem 0.75rem;
  background: rgba(31, 61, 59, 0.06);
  color: var(--muted-teal-a11y);
  border: 1px solid rgba(31, 61, 59, 0.1);
  border-radius: var(--border-radius-sm);
  font-size: 0.8125rem;
}

.btn--copy:hover {
  background: rgba(31, 61, 59, 0.1);
  color: var(--deep-green);
}

/* ---------- Section Shared ---------- */
.section {
  padding: var(--space-4xl) 0;
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section__title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  margin-bottom: var(--space-sm);
}

.section__subtitle {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ---------- Release Info ---------- */

.release-info {
  background-color: var(--white);
}

.release__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
  max-width: 960px;
  margin: 0 auto;
}

.release__highlights {
  padding-top: 0.25rem;
}

.release__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.release__list li {
  position: relative;
  padding: 0.625rem 0 0.625rem 1.75rem;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--text-body);
  border-bottom: 1px solid rgba(var(--light-gray-rgb), 0.6);
}

.release__list li:last-child {
  border-bottom: none;
}

.release__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.9375rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted-teal);
}

.release__downloads {
  background: var(--light-gray);
  border-radius: 12px;
  padding: 1.5rem;
}

.release__downloads-title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-dark);
  margin: 0 0 1rem 0;
}

.release__artifact-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.release__artifact {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--white);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-dark);
  transition: box-shadow 0.2s ease, transform 0.15s ease;
  border: 1px solid rgba(var(--deep-green-rgb), 0.08);
}

.release__artifact:hover {
  box-shadow: 0 2px 8px rgba(var(--deep-green-rgb), 0.12);
  transform: translateY(-1px);
}

.release__artifact-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(var(--muted-teal-rgb), 0.1);
  border-radius: 8px;
  color: var(--muted-teal);
}

.release__artifact-info {
  flex: 1;
  min-width: 0;
}

.release__artifact-name {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  line-height: 1.3;
}

.release__artifact-meta {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.3;
  margin-top: 0.125rem;
}

.release__artifact-badge {
  flex-shrink: 0;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: rgba(var(--muted-teal-rgb), 0.12);
  color: var(--muted-teal-a11y);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.release__artifact-badge--signed {
  background: rgba(73, 91, 37, 0.12);
  color: var(--olive-green);
}

.release__artifact-badge--cws {
  background: rgba(66, 133, 244, 0.12);
  color: #1a73e8;
}

.release__artifact-badge--unsigned {
  background: rgba(180, 140, 60, 0.12);
  color: #8a6d2b;
}

.release__links {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(var(--deep-green-rgb), 0.08);
}

.release__github-link,
.release__guide-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: var(--muted-teal-a11y);
  text-decoration: none;
  font-weight: 500;
}

.release__github-link:hover,
.release__guide-link:hover {
  color: var(--deep-green);
  text-decoration: underline;
}

.release__separator {
  color: var(--text-muted);
  font-size: 0.75rem;
}

/* ---------- Artifact Row (download link + how-to button) ---------- */
.release__artifact-row {
  display: flex;
  align-items: stretch;
  gap: 0;
}

.release__artifact-row .release__artifact {
  flex: 1;
  min-width: 0;
  border-radius: 8px 0 0 8px;
}

.howto-btn {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  padding: 0 0.875rem;
  background: var(--deep-green);
  color: var(--white);
  border: none;
  border-radius: 0 8px 8px 0;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background var(--transition-fast);
  white-space: nowrap;
}

.howto-btn:hover {
  background: var(--muted-teal);
}

.howto-btn:focus-visible {
  outline: 2px solid var(--muted-teal);
  outline-offset: 2px;
}

/* ---------- How-To Slide Panel ---------- */
.howto-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.howto-overlay--visible {
  opacity: 1;
  visibility: visible;
}

.howto-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(420px, 90vw);
  background: var(--white);
  z-index: 1000;
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.howto-panel--open {
  transform: translateX(0);
}

.howto-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--light-gray);
  background: var(--deep-green);
  color: var(--white);
}

.howto-panel__title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0;
}

.howto-panel__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  color: var(--white);
  cursor: pointer;
  border-radius: 6px;
  transition: background var(--transition-fast);
}

.howto-panel__close:hover {
  background: rgba(255, 255, 255, 0.15);
}

.howto-panel__close:focus-visible {
  outline: 2px solid var(--warm-beige);
  outline-offset: 2px;
}

.howto-panel__body {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
}

.howto-content h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--deep-green);
  margin: 0 0 1.25rem 0;
}

.howto-steps {
  list-style: none;
  counter-reset: howto-step;
  padding: 0;
  margin: 0;
}

.howto-steps li {
  counter-increment: howto-step;
  position: relative;
  padding: 0.75rem 0 0.75rem 2.5rem;
  border-bottom: 1px solid var(--light-gray);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.howto-steps li:last-child {
  border-bottom: none;
}

.howto-steps li::before {
  content: counter(howto-step);
  position: absolute;
  left: 0;
  top: 0.75rem;
  width: 1.75rem;
  height: 1.75rem;
  background: var(--deep-green);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 700;
  font-family: var(--font-ui);
}

.howto-steps code {
  background: var(--light-gray);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-size: 0.8125rem;
}

.howto-note {
  margin-top: 0.5rem;
  padding: 0.625rem 0.75rem;
  background: rgba(180, 140, 60, 0.08);
  border-left: 3px solid #c4a44a;
  border-radius: 0 6px 6px 0;
  font-size: 0.8125rem;
  color: var(--text-body);
  line-height: 1.5;
}

/* Secondary artifact row (manual install fallback) */
.release__artifact--secondary {
  opacity: 0.7;
  transition: opacity 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}

.release__artifact--secondary:hover {
  opacity: 1;
}

/* Sideload fallback collapsible in how-to panel */
.howto-sideload-fallback {
  margin-top: 1.5rem;
  border: 1px solid var(--light-gray);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
}

.howto-sideload-fallback summary {
  padding: 0.75rem 1rem;
  background: var(--light-gray);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.howto-sideload-fallback summary:hover {
  color: var(--text-dark);
}

.howto-sideload-fallback > p {
  padding: 0.75rem 1rem 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.howto-sideload-fallback > .howto-steps {
  padding: 0 1rem 0.75rem;
}

@media (max-width: 640px) {
  .release__content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* ---------- How It Works ---------- */
.how-it-works {
  background: var(--white);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2xl);
  position: relative;
}

/* Connecting line between steps */
.steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: calc(16.67% + 28px);
  right: calc(16.67% + 28px);
  height: 2px;
  background: linear-gradient(90deg, var(--muted-teal), var(--warm-beige), var(--muted-teal));
  opacity: 0.3;
}

.step {
  text-align: center;
  position: relative;
}

.step__number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(92, 145, 164, 0.1);
  border: 2px solid var(--muted-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  position: relative;
  z-index: 1;
}

.step__number svg {
  width: 24px;
  height: 24px;
  color: var(--muted-teal);
}

.step__title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--space-sm);
}

.step__desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- Value Props ---------- */
.value-props {
  background: var(--light-gray);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.card {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius);
  background: rgba(31, 61, 59, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
}

.card__icon svg {
  width: 24px;
  height: 24px;
  color: var(--deep-green);
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.card__desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- Install Section ---------- */
.install {
  background: var(--white);
}

.install__tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
}

.install__tab {
  font-family: var(--font-ui);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 0.625rem 1.5rem;
  border: 1px solid rgba(31, 61, 59, 0.15);
  border-radius: var(--border-radius-pill);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.install__tab:hover {
  border-color: var(--muted-teal);
  color: var(--muted-teal);
}

.install__tab--active {
  background: var(--deep-green);
  color: var(--white);
  border-color: var(--deep-green);
}

.install__tab--active:hover {
  color: var(--white);
  border-color: var(--deep-green);
}

.install__tab-icon {
  width: 18px;
  height: 18px;
}

.install__panel {
  display: none;
  max-width: 680px;
  margin: 0 auto;
}

.install__panel--active {
  display: block;
}

.install__step-list {
  list-style: none;
  counter-reset: install-step;
}

.install__step {
  counter-increment: install-step;
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  border-bottom: 1px solid rgba(31, 61, 59, 0.06);
}

.install__step:last-child {
  border-bottom: none;
}

.install__step-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(92, 145, 164, 0.1);
  color: var(--muted-teal);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.install__step-content h4 {
  font-family: var(--font-ui);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--space-xs);
}

.install__step-content p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.install__code {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
  background: rgba(31, 61, 59, 0.04);
  border: 1px solid rgba(31, 61, 59, 0.08);
  border-radius: var(--border-radius-sm);
  padding: var(--space-sm) var(--space-md);
}

.install__code code {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.8125rem;
  color: var(--deep-green);
  flex: 1;
}

.install__note {
  margin-top: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  background: rgba(92, 145, 164, 0.08);
  border-left: 3px solid var(--muted-teal);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  font-size: 0.875rem;
  color: var(--text-body);
}

.install__note strong {
  color: var(--text-dark);
}

.install__gatekeeper {
  margin-top: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(207, 203, 186, 0.2);
  border-radius: var(--border-radius-sm);
  font-size: 0.8125rem;
  color: var(--text-body);
}

.install__gatekeeper strong {
  color: var(--text-dark);
}

/* ---------- Requirements ---------- */
.requirements {
  background: var(--light-gray);
}

.requirements__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  max-width: 800px;
  margin: 0 auto;
}

.requirement {
  text-align: center;
  padding: var(--space-xl);
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
}

.requirement__icon {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--space-md);
  color: var(--muted-teal);
}

.requirement__label {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--space-xs);
}

.requirement__value {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ---------- Footer ---------- */
.footer {
  background: var(--deep-green);
  padding: var(--space-2xl) 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

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

.footer__logo {
  width: 28px;
  height: 28px;
  border-radius: 4px;
  object-fit: contain;
}

.footer__text {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.6);
}

.footer__text strong {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 600;
}

.footer__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.footer__link {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer__link:focus-visible {
  outline: 2px solid var(--warm-beige);
  outline-offset: 2px;
}

.footer__copyright {
  width: 100%;
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: var(--space-md);
}

.footer__copyright-text {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.35);
}

/* ---------- Scroll Animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ---------- Responsive ---------- */

/* Tablet */
@media (max-width: 960px) {
  .steps {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    max-width: 400px;
    margin: 0 auto;
  }

  .steps::before {
    display: none;
  }

  .cards {
    grid-template-columns: 1fr;
    max-width: 460px;
    margin: 0 auto;
  }

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

/* Mobile */
@media (max-width: 640px) {
  :root {
    --nav-height: 56px;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .navbar__nav {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(31, 61, 59, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-xs);
    border-bottom: 1px solid rgba(207, 203, 186, 0.12);
  }

  .navbar__nav--open {
    display: flex;
  }

  .navbar__link {
    padding: var(--space-sm) var(--space-md);
    width: 100%;
    text-align: left;
    border-radius: var(--border-radius-sm);
  }

  .navbar__link:hover {
    background: rgba(255, 255, 255, 0.05);
  }

  .navbar__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .hero {
    min-height: auto;
    padding: calc(var(--nav-height) + var(--space-2xl)) 0 var(--space-3xl);
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn--primary,
  .btn--secondary {
    width: 100%;
    justify-content: center;
  }

  .section {
    padding: var(--space-3xl) 0;
  }

  .install__tabs {
    flex-direction: column;
    align-items: stretch;
  }

  .requirements__grid {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer__links {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }

  .footer__copyright {
    text-align: left;
  }
}

/* ---------- Print ---------- */
@media print {
  .navbar,
  .hero::before,
  .hero::after {
    display: none;
  }

  .hero {
    background: white;
    color: black;
    min-height: auto;
    padding: 1rem 0;
  }

  .hero__title,
  .hero__subtitle {
    color: black;
  }
}