@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

:root {
  --bg-color: #121212;
  --surface-color: #1e1e24;
  --surface-hover: #282930;
  --surface-border: rgba(255, 255, 255, 0.08);
  --text-primary: #f1f3f4;
  --text-secondary: #9aa0a6;
  --accent-color: #01875f;
  --accent-hover: #016c4c;
  --accent-glow: rgba(1, 135, 95, 0.3);
  --danger-color: #ff5252;
  --danger-bg: rgba(255, 82, 82, 0.15);
  --border-color: #2e3033;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-elevation: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* Base Resets & Layout Locks */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Roboto', sans-serif;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
  background-color: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Sticky Glass Top Header */
.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 2rem;
  background: rgba(18, 18, 18, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--surface-border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 1.3rem;
  font-weight: 500;
  color: #fff;
  cursor: pointer;
  user-select: none;
}

.play-icon {
  width: 32px;
  height: 32px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

.search-container {
  display: flex;
  align-items: center;
  background-color: var(--surface-color);
  border: 1px solid var(--surface-border);
  border-radius: 28px;
  padding: 0.6rem 1.2rem;
  width: 45%;
  max-width: 600px;
  transition: all 0.2s ease;
}

.search-container:focus-within {
  border-color: var(--accent-color);
  box-shadow: 0 0 12px var(--accent-glow);
  background-color: var(--surface-hover);
}

.search-container input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 0.95rem;
  width: 100%;
  outline: none;
  padding-left: 0.6rem;
}

.search-container .search-icon {
  color: var(--text-secondary);
}

.user-actions {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.icon-btn {
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.2s ease, transform 0.2s ease;
  user-select: none;
}

.icon-btn:hover {
  color: var(--text-primary);
  transform: scale(1.05);
}

.profile-avatar {
  width: 38px;
  height: 38px;
  background-color: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  transition: transform 0.2s ease;
}

.profile-avatar:hover {
  transform: scale(1.05);
}

/* Category Navigation Tabs */
.category-tabs {
  display: flex;
  gap: 2.5rem;
  padding: 0 2rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-color);
}

.tab {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 1rem 0;
  cursor: pointer;
  position: relative;
  transition: color 0.2s ease;
}

.tab:hover {
  color: var(--text-primary);
}

.tab.active {
  color: var(--accent-color);
}

.tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--accent-color);
  border-radius: 3px 3px 0 0;
  box-shadow: 0 -2px 8px var(--accent-glow);
}

/* Main Content & Grid Layouts */
.store-content {
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 1.2rem;
  color: var(--text-primary);
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 1.5rem;
}

/* App Cards */
.app-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  cursor: pointer;
  padding: 0.8rem;
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease, transform 0.2s ease;
  background: transparent;
}

.app-card:hover {
  background-color: var(--surface-hover);
  transform: translateY(-4px);
}

.app-icon {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  border: 1px solid var(--surface-border);
}

.app-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.app-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-developer {
  font-size: 0.8rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-meta {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

.star-icon {
  font-size: 0.85rem !important;
  color: #ffb703;
}

/* App Details Page Styling */
.detail-container {
  max-width: 850px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  width: 100%;
}

.detail-header {
  display: flex;
  gap: 1.8rem;
  align-items: center;
  margin-bottom: 2rem;
}

.detail-app-icon {
  width: 108px;
  height: 108px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  box-shadow: var(--shadow-elevation);
  border: 1px solid var(--surface-border);
}

.detail-meta {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.detail-title {
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.2;
}

.detail-developer {
  font-size: 1rem;
  color: var(--accent-color);
  font-weight: 500;
}

.verified-tag {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

.verified-tag span {
  font-size: 1rem;
  color: var(--accent-color);
}

/* Quick Stats Bar */
.stats-bar {
  display: flex;
  justify-content: space-around;
  align-items: center;
  background-color: var(--surface-color);
  border: 1px solid var(--surface-border);
  padding: 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

.stat-divider {
  width: 1px;
  height: 28px;
  background-color: var(--border-color);
}

/* Install & Action Buttons */
.action-section {
  margin-bottom: 2.5rem;
}

.install-btn {
  display: block;
  width: 100%;
  background-color: var(--accent-color);
  color: #fff;
  text-align: center;
  padding: 1rem;
  border-radius: 28px;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.install-btn:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 6px 20px var(--accent-glow);
}

/* Horizontal Screenshots Slider */
.screenshots-section {
  margin-bottom: 2.5rem;
}

.screenshots-scroll {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  padding-bottom: 1rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

.screenshot-img {
  height: 240px;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid var(--surface-border);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.app-description {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.95rem;
}

/* Unified Form Component (Upload, Auth, Admin) */
.upload-form {
  background-color: var(--surface-color);
  border: 1px solid var(--surface-border);
  padding: 2rem;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  box-shadow: var(--shadow-elevation);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input, 
.form-group select, 
.form-group textarea {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.8rem;
  color: #fff;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
  border-color: var(--accent-color);
}

.error-msg {
  color: var(--danger-color);
  font-size: 0.8rem;
}

/* Alert / Status Boxes */
.status-box {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  display: none;
}

.status-box.success {
  display: block;
  background-color: rgba(1, 135, 95, 0.15);
  border: 1px solid var(--accent-color);
  color: #81c784;
}

.status-box.error {
  display: block;
  background-color: var(--danger-bg);
  border: 1px solid var(--danger-color);
  color: #ff8a80;
}

/* =========================================
   BULLETPROOF MOBILE RESPONSIVENESS
   ========================================= */

@media (max-width: 768px) {
  .top-nav {
    padding: 0.8rem 1rem;
  }

  .search-container {
    display: none; /* Hidden on header, accessible via search view */
  }

  .category-tabs {
    padding: 0 1rem;
    gap: 1.5rem;
    justify-content: space-around;
  }

  .store-content {
    padding: 1.2rem 1rem;
  }

  .app-grid {
    grid-template-columns: repeat(auto-fill, minmax(105px, 1fr));
    gap: 0.8rem;
  }

  .app-card {
    padding: 0.4rem;
  }

  .app-icon {
    border-radius: 16px;
  }

  .app-title {
    font-size: 0.82rem;
  }

  .app-developer {
    font-size: 0.72rem;
  }

  /* Details Page Mobile Adjustments */
  .detail-container {
    padding: 1.5rem 1rem;
  }

  .detail-header {
    gap: 1rem;
  }

  .detail-app-icon {
    width: 80px;
    height: 80px;
  }

  .detail-title {
    font-size: 1.4rem;
  }

  .screenshot-img {
    height: 180px;
  }

  .upload-form {
    padding: 1.2rem;
  }
}

@media (max-width: 480px) {
  .app-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  }