/* Card Drift — iOS 17 Install wizard (dark, ultra-thin material) */

:root {
  --install-bg: #000;
  --install-surface: rgba(28, 28, 30, 0.72);
  --install-surface-elevated: rgba(44, 44, 46, 0.82);
  --install-border: rgba(84, 84, 88, 0.45);
  --install-label: #fff;
  --install-secondary: rgba(235, 235, 245, 0.6);
  --install-tertiary: rgba(235, 235, 245, 0.38);
  --install-accent: #0a84ff;
  --install-green: #30d158;
  --install-yellow: #ffd60a;
  --install-orange: #ff9f0a;
  --install-red: #ff453a;
  --install-radius-lg: 16px;
  --install-radius-md: 12px;
  --install-radius-sm: 10px;
  --install-shadow: 0 2px 16px rgba(0, 0, 0, 0.28);
  --install-font: 'SF Pro Display', 'SF Pro Text', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --install-safe-top: env(safe-area-inset-top, 0px);
  --install-safe-bottom: env(safe-area-inset-bottom, 0px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html.ios-install-page {
  background: var(--install-bg);
  color: var(--install-label);
  -webkit-text-size-adjust: 100%;
}

body.install-body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--install-font);
  background: #000;
}

.install-page {
  max-width: 440px;
  margin: 0 auto;
  padding: calc(20px + var(--install-safe-top)) 16px calc(28px + var(--install-safe-bottom));
}

/* ── Header ── */
.install-header {
  margin-bottom: 28px;
  animation: installFadeUp 0.5s cubic-bezier(0.32, 0.72, 0, 1) both;
}

.install-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 16px;
  padding: 6px 0;
  border: 0;
  background: none;
  color: var(--install-accent);
  font: 600 15px/1.2 var(--install-font);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.install-back svg {
  width: 18px;
  height: 18px;
}

.install-app-icon {
  display: block;
  width: 72px;
  height: 72px;
  margin: 0 0 16px;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45);
}

.install-title {
  margin: 0 0 8px;
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 0.37px;
  line-height: 1.12;
}

.install-subtitle {
  margin: 0;
  font-size: 15px;
  line-height: 1.45;
  color: var(--install-secondary);
  max-width: 34ch;
}

/* ── Platform selector ── */
.install-platforms {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
  animation: installFadeUp 0.5s 0.06s cubic-bezier(0.32, 0.72, 0, 1) both;
}

.platform-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 96px;
  padding: 14px 8px;
  border: 0.5px solid var(--install-border);
  border-radius: var(--install-radius-lg);
  background: var(--install-surface);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  box-shadow: var(--install-shadow);
  color: var(--install-secondary);
  cursor: pointer;
  transition:
    transform 0.22s cubic-bezier(0.32, 0.72, 0, 1),
    border-color 0.22s ease,
    background 0.22s ease,
    color 0.22s ease,
    box-shadow 0.22s ease;
  -webkit-tap-highlight-color: transparent;
}

.platform-card:active {
  transform: scale(0.97);
}

.platform-card.is-active {
  border-color: rgba(10, 132, 255, 0.55);
  background: rgba(10, 132, 255, 0.14);
  color: var(--install-label);
  box-shadow: 0 0 0 1px rgba(10, 132, 255, 0.25), var(--install-shadow);
}

.platform-card__emoji {
  font-size: 28px;
  line-height: 1;
}

.platform-card__label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1px;
}

/* ── Stepper ── */
.install-guide-wrap {
  position: relative;
  min-height: 180px;
  margin-bottom: 20px;
  animation: installFadeUp 0.5s 0.12s cubic-bezier(0.32, 0.72, 0, 1) both;
}

.install-guide {
  display: none;
  flex-direction: column;
  gap: 0;
  border-radius: var(--install-radius-lg);
  background: var(--install-surface);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 0.5px solid var(--install-border);
  box-shadow: var(--install-shadow);
  overflow: hidden;
}

.install-guide.is-visible {
  display: flex;
  animation: installGuideIn 0.32s cubic-bezier(0.32, 0.72, 0, 1) both;
}

@keyframes installGuideIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.install-step {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  position: relative;
}

.install-step + .install-step {
  border-top: 0.5px solid rgba(84, 84, 88, 0.35);
}

.install-step__icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: rgba(120, 120, 128, 0.24);
  color: var(--install-accent);
}

.install-step__icon svg {
  width: 18px;
  height: 18px;
}

.install-step__num {
  position: absolute;
  left: 16px;
  top: 14px;
  width: 32px;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--install-tertiary);
  line-height: 32px;
  pointer-events: none;
}

.install-step__body {
  flex: 1;
  min-width: 0;
  padding-top: 2px;
}

.install-step__title {
  margin: 0 0 3px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.25;
}

.install-step__line {
  margin: 0;
  font-size: 13px;
  line-height: 1.35;
  color: var(--install-secondary);
}

/* connector dots between steps */
.install-step:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 31px;
  bottom: -1px;
  width: 2px;
  height: 1px;
  background: transparent;
}

/* ── Actions ── */
.install-actions {
  margin-bottom: 16px;
  animation: installFadeUp 0.5s 0.18s cubic-bezier(0.32, 0.72, 0, 1) both;
}

.install-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: 52px;
  padding: 14px 20px;
  border: 0;
  border-radius: var(--install-radius-md);
  background: var(--install-accent);
  color: #fff;
  font: 600 17px/1.2 var(--install-font);
  letter-spacing: -0.2px;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(10, 132, 255, 0.35);
  transition: transform 0.18s ease, opacity 0.18s ease;
  -webkit-tap-highlight-color: transparent;
}

.install-primary:active {
  transform: scale(0.98);
  opacity: 0.92;
}

.install-primary:disabled {
  opacity: 0.45;
  cursor: wait;
  box-shadow: none;
}

.install-primary svg {
  width: 20px;
  height: 20px;
}

.install-secondary {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px 0;
  margin-top: 14px;
  font-size: 14px;
  color: var(--install-secondary);
}

.install-secondary-btn {
  border: 0;
  background: none;
  padding: 6px 10px;
  color: var(--install-accent);
  font: 500 14px/1.2 var(--install-font);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.install-secondary-btn:active {
  opacity: 0.65;
}

.install-secondary-sep {
  color: var(--install-tertiary);
  user-select: none;
}

/* ── Status card ── */
.install-status {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  margin-bottom: 16px;
  border-radius: var(--install-radius-md);
  background: var(--install-surface-elevated);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border: 0.5px solid rgba(48, 209, 88, 0.28);
  box-shadow: var(--install-shadow);
  animation: installFadeUp 0.5s 0.24s cubic-bezier(0.32, 0.72, 0, 1) both;
}

.install-status.is-loading {
  border-color: var(--install-border);
}

.install-status.is-error {
  border-color: rgba(255, 69, 58, 0.35);
}

.install-status__badge {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(48, 209, 88, 0.16);
  color: var(--install-green);
  font-size: 18px;
}

.install-status.is-loading .install-status__badge {
  background: rgba(120, 120, 128, 0.2);
  color: var(--install-secondary);
}

.install-status.is-error .install-status__badge {
  background: rgba(255, 69, 58, 0.14);
  color: var(--install-red);
}

.install-status__text {
  flex: 1;
  min-width: 0;
}

.install-status__title {
  margin: 0 0 2px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.25;
}

.install-status__meta {
  margin: 0;
  font-size: 12px;
  line-height: 1.35;
  color: var(--install-secondary);
}

/* ── Alternative APK section ── */
.install-alt {
  margin-bottom: 20px;
  animation: installFadeUp 0.5s 0.3s cubic-bezier(0.32, 0.72, 0, 1) both;
}

.install-alt[hidden] {
  display: none !important;
}

.install-section-label {
  margin: 0 0 8px 4px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.2px;
  text-transform: uppercase;
  color: var(--install-tertiary);
}

.install-warning {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--install-radius-md);
  background: rgba(255, 159, 10, 0.1);
  border: 0.5px solid rgba(255, 159, 10, 0.32);
}

.install-warning__icon {
  flex-shrink: 0;
  font-size: 20px;
  line-height: 1.2;
}

.install-warning__body p {
  margin: 0;
  font-size: 13px;
  line-height: 1.45;
  color: rgba(255, 214, 10, 0.92);
}

.install-warning__body p + p {
  margin-top: 6px;
  color: var(--install-secondary);
}

/* ── FAQ ── */
.install-faq {
  animation: installFadeUp 0.5s 0.36s cubic-bezier(0.32, 0.72, 0, 1) both;
}

.install-faq-group {
  border-radius: var(--install-radius-lg);
  background: var(--install-surface);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 0.5px solid var(--install-border);
  box-shadow: var(--install-shadow);
  overflow: hidden;
}

.install-faq-item {
  border: 0;
  border-bottom: 0.5px solid rgba(84, 84, 88, 0.35);
}

.install-faq-item:last-child {
  border-bottom: 0;
}

.install-faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  border: 0;
  background: none;
  color: var(--install-label);
  font: 500 15px/1.3 var(--install-font);
  text-align: left;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.install-faq-q:active {
  background: rgba(120, 120, 128, 0.12);
}

.install-faq-chevron {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  color: var(--install-tertiary);
  transition: transform 0.28s cubic-bezier(0.32, 0.72, 0, 1);
}

.install-faq-item.is-open .install-faq-chevron {
  transform: rotate(90deg);
}

.install-faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.28s cubic-bezier(0.32, 0.72, 0, 1);
}

.install-faq-item.is-open .install-faq-a {
  grid-template-rows: 1fr;
}

.install-faq-a-inner {
  overflow: hidden;
}

.install-faq-a-inner p {
  margin: 0;
  padding: 0 16px 14px;
  font-size: 13px;
  line-height: 1.45;
  color: var(--install-secondary);
}

.install-footer-note {
  margin: 20px 4px 0;
  font-size: 12px;
  line-height: 1.4;
  color: var(--install-tertiary);
  text-align: center;
}

.install-footer-note a {
  color: var(--install-accent);
  text-decoration: none;
}

@keyframes installFadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 480px) {
  .install-page {
    padding-top: calc(32px + var(--install-safe-top));
  }
}

@media (prefers-reduced-motion: reduce) {
  .install-header,
  .install-platforms,
  .install-guide-wrap,
  .install-actions,
  .install-status,
  .install-alt,
  .install-faq {
    animation: none;
  }

  .install-guide.is-visible {
    animation: none;
  }

  .install-faq-a,
  .install-faq-chevron,
  .platform-card,
  .install-primary {
    transition: none;
  }
}