/* ==========================================================================
   KNOLECT — INSTALLATION & TUTORIAL STYLESHEET
   Harmonized with Forest Green, Warm Ivory, Emerald & Antique Gold
   ========================================================================== */

/* Section Anchor Offsets for Sticky Navbar */
#installation,
#tutorial,
#usage,
#faq {
  scroll-margin-top: 96px;
}

/* ==========================================================================
   1. INSTALLATION HERO & ONE-CLICK INSTALL EXPERIENCE
   ========================================================================== */

.install-hero-section {
  padding: 80px 0 60px;
}

.install-container {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
}

.install-header {
  text-align: center;
  margin-bottom: 36px;
}

.install-header .section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(176, 138, 79, 0.12);
  border: 1px solid var(--color-gold-border);
  color: var(--color-gold-light);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.install-title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  font-weight: 600;
  color: var(--color-forest);
  margin-bottom: 12px;
  line-height: 1.15;
}

.install-subtitle {
  font-size: 1.12rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Primary Installation Action Box (Claude in Chrome / Top Extension Style) */
.install-action-card {
  background: var(--color-forest-surface);
  border: 1px solid var(--color-forest-border);
  border-radius: var(--radius-lg);
  padding: 38px 34px;
  position: relative;
  box-shadow: 0 20px 48px -8px rgba(16, 47, 39, 0.22);
  margin-bottom: 32px;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.install-action-card:hover {
  border-color: rgba(176, 138, 79, 0.4);
  box-shadow: 0 24px 54px -6px rgba(16, 47, 39, 0.28);
}

.install-card-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.install-card-info {
  display: flex;
  align-items: center;
  gap: 20px;
}

.install-card-browser-icon {
  width: 58px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(242, 235, 221, 0.06);
  border: 1px solid rgba(176, 138, 79, 0.25);
  border-radius: 16px;
  padding: 12px;
  flex-shrink: 0;
}

.install-card-browser-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.install-card-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.install-card-title {
  font-family: var(--font-serif);
  font-size: 1.55rem;
  font-weight: 600;
  color: var(--color-ivory);
}

.install-card-subtitle {
  font-size: 0.94rem;
  color: rgba(242, 235, 221, 0.85);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.install-card-subtitle .version-tag {
  background: rgba(176, 138, 79, 0.16);
  border: 1px solid rgba(176, 138, 79, 0.3);
  color: var(--color-gold-light);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.install-card-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-add-to-chrome {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--color-emerald);
  color: var(--color-ivory);
  border: 1px solid var(--color-gold-border);
  border-radius: var(--radius-md);
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 4px 18px rgba(21, 107, 79, 0.45);
  transition: all var(--transition-normal);
}

.btn-add-to-chrome:hover {
  background: var(--color-emerald-hover);
  border-color: var(--color-gold);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(21, 107, 79, 0.55), 0 0 16px rgba(176, 138, 79, 0.3);
}

.btn-add-to-chrome svg {
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.btn-add-to-chrome:hover svg {
  transform: translateX(3px);
}

.btn-add-to-chrome:disabled,
.btn-add-to-chrome[disabled],
.btn-add-to-chrome.btn-coming-soon {
  background: rgba(242, 235, 221, 0.08);
  color: rgba(242, 235, 221, 0.65);
  border: 1px solid rgba(176, 138, 79, 0.25);
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn-add-to-chrome:disabled:hover,
.btn-add-to-chrome[disabled]:hover,
.btn-add-to-chrome.btn-coming-soon:hover {
  background: rgba(242, 235, 221, 0.08);
  border-color: rgba(176, 138, 79, 0.25);
  transform: none;
  box-shadow: none;
}

.btn-add-to-chrome:disabled svg,
.btn-add-to-chrome[disabled] svg,
.btn-add-to-chrome.btn-coming-soon svg {
  opacity: 0.6;
  transform: none;
}

/* Pre-launch State Presentation */
.install-prelaunch-box {
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid rgba(242, 235, 221, 0.12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.prelaunch-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(176, 138, 79, 0.15);
  border: 1px solid var(--color-gold-border);
  color: var(--color-gold-light);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
}

.prelaunch-status-pill .pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--color-gold);
  border-radius: 50%;
  animation: pulseGold 2s infinite ease-in-out;
}

@keyframes pulseGold {
  0% { transform: scale(0.9); opacity: 0.7; box-shadow: 0 0 0 0 rgba(176, 138, 79, 0.6); }
  50% { transform: scale(1.15); opacity: 1; box-shadow: 0 0 0 6px rgba(176, 138, 79, 0); }
  100% { transform: scale(0.9); opacity: 0.7; box-shadow: 0 0 0 0 rgba(176, 138, 79, 0); }
}

.prelaunch-desc {
  font-size: 0.88rem;
  color: rgba(242, 235, 221, 0.8);
  max-width: 540px;
}

.prelaunch-notify-form {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.prelaunch-notify-input {
  background: var(--color-forest-dark);
  border: 1px solid rgba(176, 138, 79, 0.3);
  border-radius: var(--radius-sm);
  color: var(--color-ivory);
  padding: 8px 14px;
  font-size: 0.88rem;
  font-family: var(--font-sans);
  min-width: 220px;
  outline: none;
  transition: border-color var(--transition-fast);
}

.prelaunch-notify-input:focus {
  border-color: var(--color-gold);
}

.prelaunch-notify-btn {
  background: var(--color-emerald);
  color: var(--color-ivory);
  border: 1px solid var(--color-gold-border);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.prelaunch-notify-btn:hover {
  background: var(--color-emerald-hover);
  border-color: var(--color-gold);
}

/* Browser Detection & Selector Bar */
.browser-selector-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--color-ivory-card);
  border: 1px solid rgba(16, 47, 39, 0.12);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.browser-selector-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-forest);
  display: flex;
  align-items: center;
  gap: 8px;
}

.browser-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 0;
}

.browser-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: transparent;
  border: 1px solid rgba(16, 47, 39, 0.16);
  border-radius: var(--radius-sm);
  color: var(--color-forest);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.86rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.browser-tab:hover {
  border-color: var(--color-emerald);
  background: rgba(16, 47, 39, 0.05);
}

.browser-tab.active {
  background: var(--color-forest);
  border-color: var(--color-gold);
  color: var(--color-ivory);
  box-shadow: 0 2px 10px rgba(16, 47, 39, 0.15);
}

.browser-tab img {
  width: 18px;
  height: 18px;
}

/* Browser Requirement / Unsupported Notice */
.unsupported-browser-banner {
  background: rgba(184, 80, 66, 0.12);
  border: 1px solid rgba(184, 80, 66, 0.35);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  margin-bottom: 24px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  color: var(--color-forest);
}

.unsupported-browser-banner.hidden {
  display: none !important;
}

.unsupported-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.unsupported-text h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.unsupported-text p {
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--text-secondary);
}

/* Trust Badges Bar */
.install-trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.trust-item svg {
  color: var(--color-emerald);
  flex-shrink: 0;
}

/* Developer Contributor Unpacked Accordion */
.developer-testing-box {
  margin-top: 36px;
  border: 1px dashed rgba(16, 47, 39, 0.2);
  border-radius: var(--radius-md);
  background: rgba(16, 47, 39, 0.02);
  overflow: hidden;
}

.developer-testing-summary {
  padding: 14px 20px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-forest);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.developer-testing-summary:hover {
  background: rgba(16, 47, 39, 0.04);
}

.developer-testing-content {
  padding: 16px 20px 22px;
  border-top: 1px solid rgba(16, 47, 39, 0.08);
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.developer-steps-list {
  margin: 12px 0 0 20px;
  padding: 0;
}

.developer-steps-list li {
  margin-bottom: 8px;
}

.developer-code-snippet {
  display: inline-block;
  background: var(--color-forest-dark);
  color: var(--color-gold-light);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 2px 8px;
  border-radius: 4px;
}


/* ==========================================================================
   2. VIDEO TUTORIAL SECTION: "See Knolect in Action"
   ========================================================================== */

.video-section {
  padding: 70px 0 80px;
  background: linear-gradient(180deg, var(--color-ivory) 0%, rgba(235, 226, 210, 0.5) 100%);
  border-top: 1px solid rgba(16, 47, 39, 0.08);
  border-bottom: 1px solid rgba(16, 47, 39, 0.08);
}

.video-container {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
}

.video-header {
  text-align: center;
  margin-bottom: 36px;
}

.video-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 3.8vw, 3.2rem);
  font-weight: 600;
  color: var(--color-forest);
  margin-bottom: 12px;
  line-height: 1.2;
}

.video-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.55;
}

/* Responsive 16:9 Video Showcase Frame */
.video-frame-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  background: #081814;
  border: 1px solid rgba(176, 138, 79, 0.35);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 60px -10px rgba(16, 47, 39, 0.32);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.video-frame-wrapper:hover {
  border-color: rgba(176, 138, 79, 0.55);
  box-shadow: 0 30px 70px -8px rgba(16, 47, 39, 0.4);
}

/* Poster / Placeholder View */
.video-poster-view {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.video-poster-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1), filter 300ms ease;
}

.video-poster-view:hover .video-poster-img {
  transform: scale(1.018);
  filter: brightness(1.05);
}

.video-poster-scrim {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(16, 47, 39, 0.15) 0%, rgba(8, 24, 20, 0.65) 100%);
  pointer-events: none;
}

/* Center Play Button Overlay */
.video-play-btn {
  position: relative;
  z-index: 3;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: var(--color-emerald);
  border: 3px solid var(--color-gold);
  color: var(--color-ivory);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.5), 0 0 28px rgba(176, 138, 79, 0.4);
  transition: transform 220ms cubic-bezier(0.16, 1, 0.3, 1),
              background-color 200ms ease,
              box-shadow 220ms cubic-bezier(0.16, 1, 0.3, 1);
}

.video-play-btn svg {
  width: 32px;
  height: 32px;
  margin-left: 4px;
  fill: currentColor;
}

.video-poster-view:hover .video-play-btn {
  transform: scale(1.1);
  background: var(--color-emerald-hover);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.6), 0 0 36px rgba(176, 138, 79, 0.6);
}

.video-play-btn:focus-visible {
  outline: 3px solid var(--color-gold-light);
  outline-offset: 4px;
}

/* Badge tags on Video frame */
.video-badge-top-left {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(8, 24, 20, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(176, 138, 79, 0.35);
  color: var(--color-ivory);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}

.video-badge-bottom-right {
  position: absolute;
  bottom: 20px;
  right: 20px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(8, 24, 20, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(242, 235, 221, 0.2);
  color: var(--color-gold-light);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

/* Active Player Element (iFrame or Video) */
.video-player-frame {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: none;
}

.video-player-frame.active {
  display: block;
}

/* Clean Placeholder when no video configured */
.video-coming-soon-card {
  width: 100%;
  padding: 48px 24px;
  background: var(--color-forest-surface);
  border: 1px solid rgba(176, 138, 79, 0.35);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 40px rgba(16, 47, 39, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin: 0 auto;
}

.coming-soon-icon-wrap {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: rgba(176, 138, 79, 0.15);
  border: 2px solid var(--color-gold-border);
  color: var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.coming-soon-title {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 2.5vw, 1.8rem);
  font-weight: 600;
  color: var(--color-ivory);
  margin-bottom: 10px;
}

.coming-soon-desc {
  font-size: 0.95rem;
  color: rgba(242, 235, 221, 0.85);
  max-width: 540px;
  line-height: 1.6;
  margin: 0 auto;
}


/* ==========================================================================
   3. ACTUAL USAGE STEPS SECTION: "How to Use Knolect"
   ========================================================================== */

.usage-section {
  padding: 80px 0;
}

.usage-container {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
}

.usage-header {
  text-align: center;
  margin-bottom: 48px;
}

.usage-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 3.8vw, 3.2rem);
  font-weight: 600;
  color: var(--color-forest);
  margin-bottom: 12px;
  line-height: 1.2;
}

.usage-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.55;
}

/* Step Cards Grid */
.usage-steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.usage-step-card {
  background: var(--color-forest-surface);
  border: 1px solid var(--color-forest-border);
  border-radius: var(--radius-lg);
  padding: 32px 30px;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  align-items: flex-start;
  box-shadow: 0 16px 36px rgba(16, 47, 39, 0.12);
  transition: transform 220ms cubic-bezier(0.16, 1, 0.3, 1),
              border-color 200ms ease,
              box-shadow 220ms cubic-bezier(0.16, 1, 0.3, 1);
}

.usage-step-card:hover {
  border-color: var(--color-gold);
  transform: translateY(-2px);
  box-shadow: 0 20px 44px rgba(16, 47, 39, 0.18);
}

.usage-step-num-box {
  width: 72px;
  height: 72px;
  background: rgba(176, 138, 79, 0.12);
  border: 1px solid var(--color-gold-border);
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-gold-light);
  flex-shrink: 0;
}

.usage-step-num-box .step-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.8;
}

.usage-step-num-box .step-number {
  font-family: var(--font-serif);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1;
}

.usage-step-content {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.usage-step-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-ivory);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.usage-step-title .feature-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(21, 107, 79, 0.35);
  border: 1px solid var(--color-emerald);
  color: #A3E6CD;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.usage-step-desc {
  font-size: 0.95rem;
  color: rgba(242, 235, 221, 0.88);
  line-height: 1.65;
}

.usage-features-checklist {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.usage-feature-chip {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--color-forest-dark);
  border: 1px solid rgba(176, 138, 79, 0.2);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.86rem;
  color: var(--color-ivory);
}

.usage-feature-chip svg {
  color: var(--color-emerald);
  flex-shrink: 0;
  margin-top: 2px;
}

.usage-feature-chip strong {
  display: block;
  color: var(--color-gold-light);
  font-size: 0.84rem;
  margin-bottom: 2px;
}


/* ==========================================================================
   4. TROUBLESHOOTING & INSTALLATION FAQS SECTION
   ========================================================================== */

.install-faq-section {
  padding: 80px 0 100px;
  background: linear-gradient(180deg, rgba(235, 226, 210, 0.3) 0%, var(--color-ivory) 100%);
  border-top: 1px solid rgba(16, 47, 39, 0.08);
}

.faq-container {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
}

.faq-header {
  text-align: center;
  margin-bottom: 44px;
}

.faq-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 3.8vw, 3.2rem);
  font-weight: 600;
  color: var(--color-forest);
  margin-bottom: 12px;
  line-height: 1.2;
}

.faq-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.55;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--color-ivory-card);
  border: 1px solid rgba(16, 47, 39, 0.14);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-emerald);
  box-shadow: 0 6px 20px rgba(16, 47, 39, 0.06);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: transparent;
  border: 0;
  text-align: left;
  font-family: var(--font-serif);
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--color-forest);
  cursor: pointer;
  gap: 16px;
}

.faq-question .faq-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(16, 47, 39, 0.06);
  color: var(--color-forest);
  flex-shrink: 0;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.faq-item.open .faq-question .faq-icon {
  transform: rotate(45deg);
  background: var(--color-emerald);
  color: var(--color-ivory);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  display: none;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeIn 200ms ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}


/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */

@media (max-width: 768px) {
  .install-hero-section {
    padding: 60px 0 40px;
  }
  .install-action-card {
    padding: 28px 20px;
  }
  .install-card-main {
    flex-direction: column;
    align-items: stretch;
  }
  .btn-add-to-chrome {
    width: 100%;
  }
  .usage-step-card {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 24px 20px;
  }
  .usage-step-num-box {
    width: 54px;
    height: 54px;
    border-radius: 14px;
  }
  .usage-step-num-box .step-number {
    font-size: 1.35rem;
  }
  .video-play-btn {
    width: 68px;
    height: 68px;
  }
  .video-play-btn svg {
    width: 26px;
    height: 26px;
  }
}

@media (max-width: 480px) {
  .install-header {
    margin-bottom: 24px;
  }
  .browser-selector-bar {
    padding: 12px 14px;
  }
  .install-trust-bar {
    gap: 16px;
    flex-direction: column;
    align-items: flex-start;
  }
  .faq-question {
    padding: 16px 18px;
    font-size: 1.05rem;
  }
  .faq-answer {
    padding: 0 18px 18px;
    font-size: 0.9rem;
  }
  .video-badge-top-left {
    top: 12px;
    left: 12px;
    font-size: 0.74rem;
    padding: 4px 10px;
  }
  .video-badge-bottom-right {
    bottom: 12px;
    right: 12px;
    font-size: 0.72rem;
  }
}

@media (max-width: 360px) {
  .install-action-card {
    padding: 20px 14px;
  }
  .install-card-info {
    gap: 12px;
  }
  .install-card-browser-icon {
    width: 46px;
    height: 46px;
    padding: 8px;
  }
  .install-card-title {
    font-size: 1.3rem;
  }
}