/* ========================================
   Google Play App Page — Mobile Template
   Modern CSS with Custom Properties
   ======================================== */

:root {
  --color-primary: #0b57cf;
  --color-primary-light: #eaeefa;
  --color-text: rgba(0, 0, 0, 0.8);
  --color-text-secondary: rgba(0, 0, 0, 0.6);
  --color-text-tertiary: rgba(0, 0, 0, 0.4);
  --color-bg: #ffffff;
  --color-border: #e0e0e0;
  --color-surface: #f8f8f8;
  --color-star: #f4b400;
  --color-bar-track: #e8eaed;
  --color-bar-fill: #0b57cf;
  --color-icon-placeholder: #d9d9d9;

  --font-primary: 'Google Sans', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --radius-full: 100px;

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.4;
  overflow-x: hidden;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

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

/* App Page Container */
.app-page {
  max-width: 393px;
  margin: 0 auto;
  min-height: 100dvh;
  position: relative;
  background: var(--color-bg);
  overflow-x: hidden;
}

/* Top Navigation */
.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 20px;
  position: sticky;
  top: 0;
  z-index: 99;
  background: var(--color-bg);
}

.icon-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background-color 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.icon-btn:active {
  background-color: rgba(0, 0, 0, 0.08);
}

.icon-btn .material-icons-outlined {
  font-size: 24px;
}

/* Main Content */
.content {
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  padding-bottom: 40px;
}

/* App Header */
.app-header {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.app-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  flex-shrink: 0;
  overflow: hidden;
}

.app-icon-img {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.app-info {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.app-name {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: 0.66px;
  color: var(--color-text);
  line-height: 1;
}

.app-developer {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.28px;
  color: var(--color-primary);
  line-height: 1.14;
}

/* App Stats */
.app-stats {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.stat-value {
  display: flex;
  align-items: center;
  gap: 2px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.14;
}

.stat-icon-svg {
  width: 14px;
  height: 13px;
}

.stat-icon-lg {
  width: 24px;
  height: 24px;
}

.stat-label {
  font-size: 12px;
  color: var(--color-text-secondary);
  text-align: center;
  line-height: 1.33;
}

.stat-divider {
  width: 1px;
  height: 32px;
  background: var(--color-border);
  transform: rotate(0deg);
  flex-shrink: 0;
}

/* Screenshots Slider */
.screenshots-slider {
  margin: 0 -20px;
  padding: 0 20px;
}

.screenshots-swiper {
  overflow: visible;
  padding-bottom: 28px;
}

.screenshots-swiper .swiper-slide {
  width: auto;
}

.screenshot-card {
  width: 155px;
  height: 275px;
  background: var(--color-icon-placeholder);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.screenshot-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.screenshots-swiper .swiper-pagination {
  bottom: 0;
}

.screenshots-swiper .swiper-pagination-bullet {
  width: 6px;
  height: 6px;
  background: var(--color-text-tertiary);
  opacity: 1;
}

.screenshots-swiper .swiper-pagination-bullet-active {
  background: var(--color-primary);
  width: 18px;
  border-radius: 3px;
}

/* Install Button */
.install-btn {
  width: 100%;
  height: 48px;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.42px;
  text-decoration: none;
  transition: opacity 0.2s ease, transform 0.1s ease;
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
}

.install-btn:active {
  opacity: 0.85;
  transform: scale(0.99);
}

.install-btn.open-btn {
  background: #f8f8f8;
  color: var(--color-primary);
  border: 1px solid #dadce0;
}

.install-section {
  position: relative;
  min-height: 48px;
}

.download-progress {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
}

.download-text {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: 0.25px;
}

.progress-bar-track {
  width: 100%;
  height: 4px;
  background: #e0e0e0;
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-fill {
  width: 0%;
  height: 100%;
  background: var(--color-primary);
  border-radius: 2px;
  transition: width 0.3s linear;
}

/* Section Styles */
.section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.section-title {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.6px;
  line-height: 1;
}

.section-title-medium {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.42px;
}

.icon-btn-small {
  width: 30px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  transition: opacity 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.icon-btn-small:active {
  opacity: 0.7;
}

/* About Text */
.about-text {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.28px;
  line-height: 1.5;
  color: var(--color-text);
}

/* Tags */
.tags {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.tag {
  padding: 6px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.36px;
  color: var(--color-text);
  line-height: 1.33;
}

/* Data Safety Card */
.data-safety-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.safety-item {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
}

.safety-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.safety-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.safety-main {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.28px;
  line-height: 1.4;
}

.safety-sub {
  font-size: 12px;
  color: var(--color-text-secondary);
  letter-spacing: 0.36px;
  line-height: 1.33;
}

.see-details-link {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.42px;
  color: var(--color-primary);
  align-self: flex-start;
  padding-top: var(--spacing-xs);
}

/* Rate This App */
.rate-subtitle {
  font-size: 14px;
  color: var(--color-text-secondary);
  letter-spacing: 0.28px;
  margin-top: -8px;
}

.rate-stars {
  display: flex;
  justify-content: center;
  gap: 40px;
}

.rate-star {
  width: 36px;
  height: 36px;
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  opacity: 0.54;
}

.rate-star:active,
.rate-star.active {
  transform: scale(1.15);
  opacity: 1;
  filter: invert(27%) sepia(87%) saturate(2200%) hue-rotate(211deg) brightness(88%) contrast(95%);
}

.write-review-link {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.42px;
  color: var(--color-primary);
}

/* Ratings Overview */
.ratings-overview {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.rating-big {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.rating-number {
  font-size: 48px;
  font-weight: 400;
  line-height: 1;
}

.rating-stars-small {
  display: flex;
  gap: 1px;
}

.rating-stars-small .material-icons-outlined {
  font-size: 14px;
}

.filled-star {
  color: var(--color-primary) !important;
}

.half-star {
  color: var(--color-primary) !important;
}

.rating-count {
  font-size: 12px;
  color: var(--color-text-secondary);
  letter-spacing: 0.36px;
  white-space: nowrap;
}

/* Rating Bars */
.rating-bars {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.bar-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.bar-row > span {
  font-size: 12px;
  color: var(--color-text-secondary);
  width: 10px;
  text-align: right;
}

.bar-track {
  flex: 1;
  height: 8px;
  background: var(--color-bar-track);
  border-radius: 4px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: var(--color-bar-fill);
  border-radius: 4px;
  transition: width 0.6s ease;
}

/* Reviews */
.review {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-bar-track);
}

.review:first-of-type {
  border-top: none;
  padding-top: 0;
}

.review-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.review-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  flex-shrink: 0;
}

.review-name {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.28px;
  flex: 1;
}

.icon-btn-tiny {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  -webkit-tap-highlight-color: transparent;
}

.icon-btn-tiny .material-icons-outlined {
  font-size: 18px;
  color: var(--color-text-secondary);
}

.review-rating {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.review-stars {
  display: flex;
  gap: 1px;
}

.tiny-star {
  font-size: 14px !important;
  color: var(--color-text-tertiary);
}

.tiny-star.filled-star {
  color: var(--color-primary) !important;
}

.review-date {
  font-size: 12px;
  color: var(--color-text-secondary);
  letter-spacing: 0.36px;
}

.review-text {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.28px;
  line-height: 1.5;
}

.review-helpful-count {
  font-size: 12px;
  color: var(--color-text-secondary);
  letter-spacing: 0.36px;
}

.review-helpful {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 12px;
  color: var(--color-text-secondary);
  letter-spacing: 0.36px;
}

.helpful-btn {
  font-size: 12px;
  color: var(--color-text-secondary);
  padding: 4px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  letter-spacing: 0.36px;
  transition: background-color 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.helpful-btn:active {
  background-color: var(--color-primary-light);
}

/* App Support */
.support-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.support-item {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
}

.support-icon {
  font-size: 20px;
  color: var(--color-text);
  flex-shrink: 0;
  margin-top: 1px;
}

.support-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.support-main {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.42px;
}

.support-sub {
  font-size: 12px;
  color: var(--color-text);
  letter-spacing: 0.36px;
}

/* Developer Info */
.developer-info {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.28px;
  line-height: 1.6;
  color: var(--color-text);
}

.developer-info p {
  margin: 0;
}

/* Similar Apps */
.similar-apps {
  display: flex;
  gap: var(--spacing-md);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 4px;
}

.similar-apps::-webkit-scrollbar {
  display: none;
}

.similar-app {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  flex-shrink: 0;
  width: 102px;
  scroll-snap-align: start;
}

.similar-app-icon {
  width: 102px;
  height: 102px;
  border-radius: 22.7px;
  background: var(--color-icon-placeholder);
}

.similar-app-name {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.36px;
  line-height: 1.4;
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.similar-app-rating {
  display: inline-flex;
  align-items: center;
  gap: 1px;
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
  padding: 3px 6px;
  font-size: 12px;
  width: fit-content;
}

.mini-star {
  font-size: 12px !important;
}

/* Gesture Bar */
.gesture-bar {
  position: sticky;
  bottom: 0;
  height: 34px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 8px;
  background: var(--color-bg);
}

.gesture-pill {
  width: 64px;
  height: 3px;
  border-radius: 32px;
  background: #949494;
}

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

/* Safe area for notched devices */
@supports (padding: env(safe-area-inset-bottom)) {
  .gesture-bar {
    padding-bottom: calc(8px + env(safe-area-inset-bottom));
  }
}