/* ═══════════════════════════════════════════════════════════════════════════
   INSTALL PAGE — Apple-Level Polish
   Premium feel with refined animations, typography, and micro-interactions
   ═══════════════════════════════════════════════════════════════════════════ */

/* ===== PAGE SETUP ===== */
.install-page {
  background: var(--paper);
}

.install-page .sticky-nav {
  transform: translateY(0);
  opacity: 1;
}

/* ===== INSTALL HERO ===== */
.install-hero {
  min-height: 45vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 140px 2rem 60px;
  background: var(--paper);
  position: relative;
  overflow: hidden;
}

/* Subtle gradient backdrop */
.install-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse 100% 80% at 50% 120%, rgba(201, 160, 160, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 30% 20%, rgba(201, 160, 160, 0.03) 0%, transparent 40%);
  pointer-events: none;
}

.install-hero-content {
  position: relative;
  z-index: 1;
  animation: fadeInUp 0.8s var(--ease-out-expo);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.install-title {
  font-size: clamp(3.5rem, 10vw, 6rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  color: var(--ink);
  margin-bottom: 1rem;
  line-height: 1.05;
}

.install-subtitle {
  font-size: clamp(1.25rem, 2.5vw, 1.625rem);
  color: var(--muted);
  font-weight: 400;
  max-width: 480px;
  line-height: 1.5;
}

/* ===== REQUIREMENTS BOX ===== */
.install-requirements {
  padding: 0 2rem 5rem;
  min-height: auto;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.1s both;
}

.requirements-box {
  max-width: 580px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(0,0,0,0.015) 0%, rgba(0,0,0,0.025) 100%);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 24px;
  padding: 2.5rem 3rem;
  backdrop-filter: blur(10px);
}

.requirements-title {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--pencil);
  margin-bottom: 1.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.requirements-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.125rem;
}

.requirements-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  font-size: 1.0625rem;
  color: var(--ink);
  text-align: left;
  line-height: 1.5;
}

.requirements-list li strong {
  font-weight: 600;
}

.req-icon {
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
  font-size: 1.125rem;
}

/* ===== INSTALL OPTIONS ===== */
.install-option {
  padding: 5rem 2rem 6rem;
  max-width: 760px;
  margin: 0 auto;
  min-height: auto;
}

.option-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.option-badge {
  display: inline-block;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding: 0.625rem 1.5rem;
  border-radius: 100px;
  background: rgba(0, 0, 0, 0.03);
  border: 1px solid rgba(0, 0, 0, 0.06);
  color: var(--pencil);
  margin-bottom: 1.5rem;
}

.option-badge.recommended {
  background: linear-gradient(135deg, rgba(201, 160, 160, 0.12) 0%, rgba(201, 160, 160, 0.18) 100%);
  border-color: rgba(201, 160, 160, 0.25);
  color: #7D5A5A;
}

.option-title {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  color: var(--ink);
  margin-bottom: 0.875rem;
  line-height: 1.1;
}

.option-desc {
  font-size: 1.1875rem;
  color: var(--muted);
  line-height: 1.5;
}

/* ===== INSTALL STEPS ===== */
.install-steps {
  display: flex;
  flex-direction: column;
}

.install-steps.compact .install-step {
  padding: 1.75rem 0;
}

.install-step {
  display: flex;
  gap: 1.75rem;
  padding: 2.75rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  position: relative;
  text-align: left;
  transition: all 0.3s var(--ease-out-expo);
}

.install-step:last-child {
  border-bottom: none;
}

.install-step.success {
  background: linear-gradient(100deg, rgba(201, 160, 160, 0.08) 0%, rgba(201, 160, 160, 0.02) 60%, transparent 100%);
  border-radius: 20px;
  padding: 2.25rem 2rem;
  margin-top: 2rem;
  border-bottom: none;
}

.step-num {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0,0,0,0.03) 0%, rgba(0,0,0,0.05) 100%);
  font-size: 1.1875rem;
  font-weight: 600;
  color: var(--ink);
  transition: all 0.3s var(--ease-out-expo);
}

.install-step:hover .step-num {
  transform: scale(1.05);
  background: linear-gradient(135deg, rgba(0,0,0,0.05) 0%, rgba(0,0,0,0.07) 100%);
}

.install-step.success .step-num {
  background: linear-gradient(135deg, var(--accent) 0%, #A88080 100%);
  color: white;
  font-size: 1.375rem;
  box-shadow: 0 4px 16px rgba(201, 160, 160, 0.35);
}

.step-content {
  flex: 1;
  padding-top: 0.125rem;
}

.step-content h4 {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.625rem;
  letter-spacing: -0.01em;
}

.step-content p {
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 1rem;
  font-size: 1.0625rem;
}

.step-content p:last-child {
  margin-bottom: 0;
}

.step-note {
  font-size: 0.9375rem;
  color: var(--pencil) !important;
}

.step-note a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.step-note a:hover {
  color: #8B6969;
}

/* ===== DOWNLOAD BUTTON ===== */
.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.875rem;
  padding: 1.125rem 2.25rem;
  background: var(--ink);
  color: white;
  font-weight: 600;
  font-size: 1.0625rem;
  border-radius: 100px;
  text-decoration: none;
  transition: all 0.4s var(--ease-out-expo);
  margin: 1.25rem 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.download-btn:hover {
  transform: scale(1.03);
  background: #2d2d2f;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
}

.download-btn:active {
  transform: scale(0.98);
}

.download-btn svg {
  width: 22px;
  height: 22px;
  transition: transform 0.3s var(--ease-out-expo);
}

.download-btn:hover svg {
  transform: translateY(2px);
}

/* ===== VISUAL HINTS — DMG Drag Animation ===== */
.visual-hint {
  margin: 1.75rem 0;
}

.dmg-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3rem;
  padding: 3rem;
  background: linear-gradient(135deg, rgba(0,0,0,0.015) 0%, rgba(0,0,0,0.03) 100%);
  border-radius: 24px;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.app-icon, .folder-icon {
  width: 88px;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: all 0.4s var(--ease-out-expo);
}

.app-icon {
  background: linear-gradient(145deg, #1D1D1F 0%, #3a3a3c 100%);
  color: var(--accent);
  box-shadow: 
    0 12px 32px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255,255,255,0.1);
}

.app-icon:hover {
  transform: translateY(-4px) rotate(-2deg);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.25);
}

.folder-icon {
  background: linear-gradient(145deg, #007AFF 0%, #5856D6 100%);
  color: white;
  box-shadow: 
    0 12px 32px rgba(0, 122, 255, 0.25),
    inset 0 1px 0 rgba(255,255,255,0.2);
}

.folder-icon:hover {
  transform: translateY(-4px) rotate(2deg);
  box-shadow: 0 20px 48px rgba(0, 122, 255, 0.3);
}

.arrow {
  font-size: 2.5rem;
  color: var(--pencil);
  opacity: 0.4;
  animation: arrowPulse 2s ease-in-out infinite;
}

@keyframes arrowPulse {
  0%, 100% { opacity: 0.4; transform: translateX(0); }
  50% { opacity: 0.7; transform: translateX(6px); }
}

/* ===== PERMISSIONS ===== */
.permissions-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.25rem;
}

.permission-item {
  display: flex;
  gap: 1.125rem;
  padding: 1.375rem 1.5rem;
  background: linear-gradient(135deg, rgba(0,0,0,0.015) 0%, rgba(0,0,0,0.025) 100%);
  border-radius: 16px;
  border: 1px solid rgba(0, 0, 0, 0.04);
  text-align: left;
  transition: all 0.3s var(--ease-out-expo);
}

.permission-item:hover {
  transform: translateX(4px);
  background: linear-gradient(135deg, rgba(0,0,0,0.02) 0%, rgba(0,0,0,0.035) 100%);
}

.permission-icon {
  font-size: 1.625rem;
  flex-shrink: 0;
}

.permission-item strong {
  display: block;
  margin-bottom: 0.375rem;
  color: var(--ink);
  font-weight: 600;
}

.permission-item p {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0 !important;
  line-height: 1.6;
}

/* ===== KEYBOARD SHORTCUTS ===== */
kbd {
  display: inline-block;
  padding: 0.3125rem 0.75rem;
  background: linear-gradient(180deg, rgba(0,0,0,0.04) 0%, rgba(0,0,0,0.07) 100%);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 8px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink);
  box-shadow: 
    0 2px 0 rgba(0,0,0,0.05),
    inset 0 -1px 0 rgba(0,0,0,0.05);
}

/* ===== SECURITY SECTION ===== */
.security-section {
  padding: 4rem 2rem 5rem;
  min-height: auto;
}

.security-box {
  max-width: 680px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(255, 159, 10, 0.04) 0%, rgba(255, 159, 10, 0.08) 100%);
  border: 1px solid rgba(255, 159, 10, 0.15);
  border-radius: 24px;
  padding: 2.75rem 3rem;
  text-align: left;
  position: relative;
  overflow: hidden;
}

.security-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #FF9F0A, #FFB340);
  border-radius: 24px 24px 0 0;
}

.security-header {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  margin-bottom: 1.5rem;
}

.security-icon {
  font-size: 1.75rem;
}

.security-header h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #9A6200;
  letter-spacing: -0.01em;
}

.security-intro {
  color: var(--ink);
  margin-bottom: 2.25rem;
  line-height: 1.75;
  font-size: 1.125rem;
}

.security-explanation {
  margin-bottom: 2.25rem;
}

.security-explanation h4,
.security-fix h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.875rem;
}

.security-explanation p {
  color: var(--muted);
  line-height: 1.75;
  font-size: 1rem;
}

.security-fix ol {
  color: var(--ink);
  line-height: 2.2;
  padding-left: 1.625rem;
  margin: 0;
  font-size: 1.0625rem;
}

.security-fix ol li {
  margin-bottom: 0.375rem;
}

.security-note {
  font-size: 0.9375rem;
  color: var(--muted);
  margin-top: 2.25rem;
  font-style: italic;
  padding-top: 1.75rem;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  line-height: 1.6;
}

/* ===== CODE BLOCKS ===== */
.code-block {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: linear-gradient(135deg, #1D1D1F 0%, #2d2d2f 100%);
  border-radius: 14px;
  padding: 1.125rem 1.375rem;
  margin: 1.125rem 0;
  overflow-x: auto;
  box-shadow: 
    0 4px 16px rgba(0, 0, 0, 0.12),
    inset 0 1px 0 rgba(255,255,255,0.05);
}

.code-block code {
  flex: 1;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.9375rem;
  color: var(--accent);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5625rem 1.125rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s var(--ease-out-expo);
  flex-shrink: 0;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.14);
  color: white;
  transform: scale(1.02);
}

.copy-btn:active {
  transform: scale(0.98);
}

.copy-btn.copied {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.copy-btn svg {
  width: 15px;
  height: 15px;
}

/* ===== TROUBLESHOOTING ===== */
.troubleshooting {
  padding: 6rem 2rem;
  max-width: 920px;
  margin: 0 auto;
  min-height: auto;
}

.trouble-title {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  text-align: center;
  color: var(--ink);
  margin-bottom: 0.625rem;
  line-height: 1.1;
}

.trouble-subtitle {
  text-align: center;
  color: var(--muted);
  margin-bottom: 3.5rem;
  font-size: 1.1875rem;
}

.trouble-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.375rem;
}

.trouble-card {
  background: linear-gradient(135deg, rgba(0,0,0,0.015) 0%, rgba(0,0,0,0.025) 100%);
  border: 1px solid rgba(0, 0, 0, 0.04);
  border-radius: 20px;
  padding: 1.875rem 2rem;
  text-align: left;
  transition: all 0.4s var(--ease-out-expo);
}

.trouble-card:hover {
  background: linear-gradient(135deg, rgba(0,0,0,0.02) 0%, rgba(0,0,0,0.04) 100%);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.06);
}

.trouble-card h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.trouble-card p {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.65;
}

/* ===== HELP SECTION ===== */
.help-section {
  padding: 6rem 2rem 7rem;
  background: linear-gradient(180deg, var(--paper) 0%, rgba(201, 160, 160, 0.04) 100%);
  min-height: auto;
}

.help-box {
  max-width: 840px;
  margin: 0 auto;
}

.help-title {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  text-align: center;
  color: var(--ink);
  margin-bottom: 0.625rem;
  line-height: 1.1;
}

.help-intro {
  text-align: center;
  color: var(--muted);
  margin-bottom: 3.5rem;
  font-size: 1.1875rem;
}

.help-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.help-option {
  background: white;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 24px;
  padding: 2.25rem 1.75rem;
  text-align: center;
  transition: all 0.4s var(--ease-out-expo);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
  position: relative;
  overflow: hidden;
}

.help-option::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(201, 160, 160, 0.03) 100%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.help-option:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1);
  border-color: rgba(201, 160, 160, 0.2);
}

.help-option:hover::before {
  opacity: 1;
}

.help-option a.help-link {
  display: block;
  text-decoration: none;
  color: inherit;
  position: relative;
  z-index: 1;
}

.help-icon {
  font-size: 2.75rem;
  margin-bottom: 1.25rem;
  transition: transform 0.4s var(--ease-out-expo);
}

.help-option:hover .help-icon {
  transform: scale(1.1);
}

.help-option h4 {
  font-size: 1.1875rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.625rem;
  letter-spacing: -0.01em;
}

.help-option p {
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.65;
}

.help-option strong {
  color: var(--accent);
  font-weight: 600;
}

/* ===== DIAGNOSTICS EXAMPLE ===== */
.diagnostics-example {
  background: white;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 24px;
  padding: 2.25rem 2.5rem;
  text-align: left;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
}

.diagnostics-example h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--pencil);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.diagnostics-example pre {
  margin: 0;
  padding: 1.5rem 1.75rem;
  background: linear-gradient(135deg, #1D1D1F 0%, #2d2d2f 100%);
  border-radius: 14px;
  overflow-x: auto;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.diagnostics-example code {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
}

/* ===== FOOTER ===== */
.install-page .footer {
  background: var(--paper);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding: 2.5rem 2rem;
}

.install-page .footer-text {
  color: var(--muted);
  font-size: 0.9375rem;
}

.install-page .footer-text a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.install-page .footer-text a:hover {
  color: var(--accent);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .help-options {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .install-hero {
    padding-top: 110px;
    min-height: 35vh;
  }
  
  .install-step {
    flex-direction: column;
    gap: 1.25rem;
  }
  
  .step-num {
    width: 44px;
    height: 44px;
    font-size: 1rem;
  }
  
  .dmg-visual {
    flex-direction: column;
    gap: 1.75rem;
    padding: 2.5rem 2rem;
  }
  
  .arrow {
    transform: rotate(90deg);
    animation: arrowPulseVertical 2s ease-in-out infinite;
  }
  
  @keyframes arrowPulseVertical {
    0%, 100% { opacity: 0.4; transform: rotate(90deg) translateX(0); }
    50% { opacity: 0.7; transform: rotate(90deg) translateX(6px); }
  }
  
  .code-block {
    flex-direction: column;
    align-items: stretch;
    gap: 0.875rem;
  }
  
  .copy-btn {
    justify-content: center;
  }
  
  .security-box,
  .requirements-box {
    padding: 2rem 1.75rem;
  }
  
  .install-option,
  .troubleshooting,
  .help-section {
    padding: 4rem 1.5rem;
  }
  
  .help-option {
    padding: 1.75rem 1.5rem;
  }
  
  .diagnostics-example {
    padding: 1.75rem;
  }
}

@media (max-width: 480px) {
  .nav-links a:not(.nav-cta) {
    display: none;
  }
  
  .install-title {
    font-size: 2.75rem;
  }
  
  .option-title,
  .trouble-title,
  .help-title {
    font-size: 2rem;
  }
  
  .step-content h4 {
    font-size: 1.1875rem;
  }
  
  .step-content p {
    font-size: 1rem;
  }
}

/* ===== SMOOTH SCROLL ENHANCEMENT ===== */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}