/**
 * Elite responsive — desktop & tablet polish, card-like, content width
 * Makes the app feel premium on all devices.
 */

/* ----- Card-like utility (use on any content block) ----- */
.card-like {
  padding: var(--app-space-lg);
  border-radius: var(--app-radius-lg);
  border: 1px solid var(--app-border);
  background: var(--app-bg-elevated);
  box-shadow: var(--app-shadow-card);
  transition: box-shadow var(--app-duration) var(--app-ease), border-color var(--app-duration) var(--app-ease), transform var(--app-duration-fast) var(--app-ease);
}
.card-like:hover {
  box-shadow: var(--app-shadow-card-hover);
  border-color: rgba(99, 102, 241, 0.2);
}

/* ----- Content width & main area (all devices) ----- */
.app-main-inner {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-bottom: env(safe-area-inset-bottom, 24px);
}
.page-content {
  width: 100%;
}

/* ----- Tablet (768px+) — sidebar layout, wider content ----- */
@media (min-width: 768px) {
  .app-main-inner {
    max-width: 720px;
    padding-left: var(--app-space-xl);
    padding-right: var(--app-space-xl);
    padding-bottom: var(--app-space-xl);
  }
  .page-content {
    padding: var(--app-space-xl) 0 48px;
  }
  .page-title {
    font-size: clamp(1.35rem, 2.5vw, 1.75rem);
    margin-bottom: var(--app-space-md);
  }
  .page-subtitle {
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    margin-bottom: var(--app-space-lg);
    line-height: 1.6;
  }
  .feature-intro {
    font-size: 1rem;
    line-height: 1.65;
    margin-bottom: var(--app-space-xl);
  }
  .flow-card {
    padding: 20px 22px;
    border-radius: var(--app-radius-lg);
    margin-bottom: 14px;
  }
  .flow-card-text strong {
    font-size: 1rem;
  }
  .flow-card-text span {
    font-size: 0.875rem;
  }
  .explore-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    padding: var(--app-space-lg);
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
  }
  .explore-tile {
    padding: 28px 20px;
    min-width: 0;
    min-height: 130px;
    font-size: 0.9375rem;
    border-radius: var(--app-radius-lg);
  }
  .explore-tile-icon {
    width: 64px;
    height: 64px;
    font-size: 2.25rem;
  }
  .explore-tile-desc {
    display: block;
    font-size: 0.8125rem;
  }
  /* Games */
  .games-list-section .page-content {
    padding-top: var(--app-space-md);
  }
  .games-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
  }
  .game-card {
    padding: 24px 20px;
    border-radius: var(--app-radius-lg);
  }
  .game-card-title {
    font-size: 1.15rem;
  }
  .game-card-desc {
    font-size: 0.875rem;
  }
  /* Profile */
  .profile-header {
    padding: 36px 24px;
  }
  .profile-avatar {
    width: 100px;
    height: 100px;
    font-size: 2.5rem;
  }
  .profile-name {
    font-size: 1.5rem;
  }
  .profile-stats {
    gap: 20px;
    margin: var(--app-space-lg) 0;
  }
  .profile-stat {
    padding: 22px 14px;
    border-radius: var(--app-radius-lg);
  }
  .profile-stat-value {
    font-size: 1.35rem;
  }
  /* Tabbar sidebar polish (layout.css grid places it left) */
  .app-tabbar {
    padding: 20px 0;
    gap: 8px;
    box-shadow: none;
  }
  .app-tab {
    padding: 14px 8px;
    border-radius: var(--app-radius-md);
    transition: background var(--app-duration-fast) var(--app-ease), color var(--app-duration) var(--app-ease);
  }
  .app-tab:hover {
    background: var(--app-primary-soft);
  }
  .app-tab-icon {
    width: 32px;
    height: 32px;
  }
  .app-tab-icon svg {
    width: 26px;
    height: 26px;
  }
  .app-header {
    padding: 0 24px;
  }
  .app-header-logo img {
    width: 38px;
    height: 38px;
    object-fit: contain;
  }
  .app-header-badge {
    font-size: 0.875rem;
  }
}

/* ----- Desktop (1024px+) — elite width, 4-col grids ----- */
@media (min-width: 1024px) {
  .app-main-inner {
    max-width: 880px;
    padding-left: 40px;
    padding-right: 40px;
    padding-bottom: 48px;
  }
  .page-content {
    padding: 40px 0;
  }
  .page-title {
    font-size: 1.75rem;
    letter-spacing: -0.04em;
    margin-bottom: var(--app-space-md);
  }
  .page-subtitle {
    font-size: 1rem;
    margin-bottom: var(--app-space-lg);
    max-width: 56ch;
  }
  .explore-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    max-width: 900px;
    gap: 24px;
    padding: var(--app-space-xl);
  }
  .explore-tile {
    padding: 32px 24px;
    min-width: 0;
    min-height: 140px;
    font-size: 1rem;
  }
  .explore-tile:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--app-shadow-card-hover), 0 8px 32px -8px rgba(99, 102, 241, 0.25);
  }
  .explore-tile-icon {
    width: 72px;
    height: 72px;
    font-size: 2.5rem;
  }
  .games-grid {
    grid-template-columns: repeat(4, 1fr);
    max-width: 960px;
    gap: 24px;
  }
  .game-card {
    padding: 28px 24px;
  }
  .game-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--app-shadow-card-hover), 0 12px 36px -8px rgba(99, 102, 241, 0.2);
  }
  .game-card-title {
    font-size: 1.2rem;
  }
  .game-panel .page-content {
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
  }
  .flow-card {
    padding: 22px 24px;
    max-width: 100%;
  }
  .flow-card:hover {
    transform: translateY(-3px);
  }
  .btn-primary-block {
    padding: 18px 28px;
    font-size: 1.0625rem;
    border-radius: var(--app-radius-lg);
  }
  .btn-primary-block:hover {
    transform: translateY(-2px);
    box-shadow: var(--app-shadow-glow), 0 8px 24px rgba(99, 102, 241, 0.4);
  }
  .app-tabbar {
    width: 96px;
    padding: 24px 0;
  }
  .app-tab span:last-child {
    display: block;
    font-size: 0.6875rem;
    margin-top: 4px;
  }
  .app-header {
    padding: 0 32px;
  }
  .app-header-logo {
    font-size: 1.25rem;
  }
  .app-header-logo img {
    width: 42px;
    height: 42px;
    object-fit: contain;
  }
  /* Profile two-column feel on desktop */
  .profile-header {
    padding: 48px 32px;
  }
  .profile-avatar {
    width: 112px;
    height: 112px;
    font-size: 2.75rem;
  }
  .profile-name {
    font-size: 1.65rem;
  }
  .notifications-list,
  .flow-cards {
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
  }
}

/* ----- Large desktop (1280px+) — wider content, elegant gutters ----- */
@media (min-width: 1280px) {
  .app-main-inner {
    max-width: 1024px;
  }
  .explore-grid {
    max-width: 1024px;
  }
  .games-grid {
    max-width: 1100px;
  }
}

/* ----- Desktop: consistent gradient vibe — fixed mesh shows through entire scroll ----- */
@media (min-width: 768px) {
  .app-main {
    position: relative;
    background: transparent;
  }
  /* Gutter width = (100% - content max) / 2 so panels align with .app-main-inner edges */
  .app-main::before,
  .app-main::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: calc((100% - 720px) / 2);
    min-width: 0;
    pointer-events: none;
    z-index: 0;
  }
  .app-main::before {
    left: 0;
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.02) 25%, transparent 100%);
  }
  .app-main::after {
    right: 0;
    background: linear-gradient(270deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.02) 25%, transparent 100%);
  }
  /* Uniform frosted center so fixed mesh stays consistent at every scroll position */
  .app-main-inner {
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.8), 0 0 0 1px rgba(99, 102, 241, 0.06) inset;
    border-radius: 0;
    min-height: 100%;
  }
  .app-dark .app-main::before {
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.03) 25%, transparent 100%);
  }
  .app-dark .app-main::after {
    background: linear-gradient(270deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.03) 25%, transparent 100%);
  }
  .app-dark .app-main-inner {
    background: rgba(24, 24, 27, 0.78);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.04), 0 0 0 1px rgba(99, 102, 241, 0.08) inset;
  }
}
@media (min-width: 1024px) {
  .app-main::before,
  .app-main::after {
    width: calc((100% - 880px) / 2);
  }
}
@media (min-width: 1280px) {
  .app-main::before,
  .app-main::after {
    width: calc((100% - 1024px) / 2);
  }
}

/* ----- Content cards: metric grids (student profile, parent dashboard) ----- */
.profile-metric-grid,
.dashboard-metric-grid {
  display: grid;
  gap: var(--app-space-md);
  margin-bottom: var(--app-space-lg);
}
@media (min-width: 600px) {
  .profile-metric-grid,
  .dashboard-metric-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--app-space-lg);
  }
}
@media (min-width: 1024px) {
  .profile-metric-grid,
  .dashboard-metric-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}