/* Structural — Responsive refinements
 * Handles mobile and tablet breakpoints across all pages.
 * Loaded last so it overrides component-level styles.
 */

/* === Tablet (≤1024px) === */
@media (max-width: 1024px) {
  .container-wide,
  .site-header__inner,
  .site-footer__inner {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .home__hero {
    padding: var(--space-7) var(--space-4) var(--space-6);
  }

  .ph-hero__name {
    font-size: clamp(32px, 5vw, 48px);
  }
}

/* === Small tablet / large phone (≤768px) === */
@media (max-width: 768px) {
  :root {
    --space-7: 32px;
    --space-8: 48px;
    --space-9: 64px;
    --space-10: 88px;
  }

  .site-header {
    height: 56px;
  }

  .site-header__nav {
    gap: var(--space-4);
  }

  .site-header__nav-link {
    font-size: var(--fs-13);
  }

  /* Hide GitHub link on very small screens to save space */
  .site-header__nav-link[href*="github"] {
    display: none;
  }

  /* === Home === */
  .home__eyebrow {
    font-size: var(--fs-11, 11px);
    padding: 4px 10px;
  }

  .home__brand {
    font-size: clamp(44px, 13vw, 64px);
  }

  .home__tagline {
    font-size: var(--fs-16);
    line-height: 1.55;
  }

  /* Stack the inline demo vertically on mobile */
  .demo-pair {
    grid-template-columns: 1fr !important;
    gap: var(--space-3);
    padding: var(--space-4);
  }

  .demo-pair__card,
  .demo-pair__card--right {
    text-align: left;
  }

  .demo-pair__connector {
    flex-direction: row;
    padding: var(--space-2) 0;
    justify-content: center;
    gap: var(--space-3);
  }

  .demo-pair__symbol {
    width: 36px;
    height: 36px;
    font-size: 22px;
  }

  .home__demo-caption {
    font-size: var(--fs-13);
  }

  .searchbox__input {
    height: 52px;
    font-size: var(--fs-14);
  }

  .searchbox__submit {
    width: 44px;
    height: 44px;
  }

  .home__daily-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .home__daily-grid {
    grid-template-columns: 1fr !important;
    gap: var(--space-3);
  }

  .home__stats-inner {
    gap: var(--space-4);
  }

  .home__stats-num {
    font-size: var(--fs-20);
  }

  /* === Search page === */
  .search-summary__query {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .search-summary__term {
    font-size: var(--fs-24);
    line-height: 1.3;
  }

  .search-stats {
    grid-template-columns: 1fr !important;
    gap: var(--space-3);
  }

  .result-card {
    grid-template-columns: 1fr !important;
    padding: var(--space-4);
  }

  .result-card__aside {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    min-width: 0;
  }

  .result-card__score-num {
    font-size: var(--fs-20);
  }

  /* === Phenomenon page === */
  .ph-hero {
    padding: var(--space-4) 0 var(--space-5);
  }

  .ph-hero__name {
    font-size: clamp(28px, 7vw, 40px) !important;
  }

  .ph-hero__description {
    font-size: var(--fs-14);
  }

  .ph-section__header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .ph-section__caption {
    text-align: left;
    max-width: 100%;
  }

  .ph-section__title {
    font-size: var(--fs-20);
  }

  .ph-cross {
    grid-template-columns: 1fr !important;
  }

  .mapping-pair {
    padding: var(--space-4);
  }

  .mapping-pair__heads {
    grid-template-columns: 1fr !important;
    gap: var(--space-3);
  }

  .mapping-pair__head,
  .mapping-pair__head--right {
    text-align: left !important;
  }

  .mapping-pair__head-name {
    font-size: var(--fs-20);
  }

  .mapping-pair__connector {
    flex-direction: row;
    padding: var(--space-2) 0;
    justify-content: center;
  }

  .mapping-pair__symbol {
    width: 44px;
    height: 44px;
    font-size: 24px;
  }

  .mapping-pair__formula {
    font-size: var(--fs-12);
    padding: var(--space-2) var(--space-3);
  }

  .param-mapping {
    padding: var(--space-4);
  }

  .param-mapping__grid {
    grid-template-columns: 1fr !important;
    gap: var(--space-2);
  }

  .param-mapping__head,
  .param-mapping__head--right {
    display: none;
  }

  .param-mapping__row-a,
  .param-mapping__row-b {
    text-align: left !important;
    padding: var(--space-2);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
  }

  .param-mapping__row-b {
    border-left: 2px solid var(--text-primary);
    margin-left: var(--space-4);
    background: var(--bg-tertiary);
  }

  .param-mapping__connector {
    display: none;
  }

  .ph-actions {
    padding: var(--space-4);
  }

  .ph-action {
    grid-template-columns: 20px 1fr;
    gap: var(--space-3);
  }

  .ph-action__number {
    width: 20px;
    height: 20px;
    font-size: var(--fs-11, 11px);
  }

  .ph-why {
    padding: var(--space-4);
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  /* === Discoveries page === */
  .disc-hero__title {
    font-size: clamp(36px, 10vw, 56px);
  }

  .disc-hero__lede {
    font-size: var(--fs-16);
  }

  .disc-filter {
    gap: var(--space-1);
    margin-bottom: var(--space-4);
  }

  .disc-filter__label {
    width: 100%;
    margin-bottom: var(--space-2);
    margin-right: 0;
  }

  .disc-filter__btn {
    padding: 5px 10px;
    font-size: var(--fs-12);
  }

  .disc-item__header {
    grid-template-columns: 1fr !important;
    gap: var(--space-3);
    padding: var(--space-4);
  }

  .disc-item__rank {
    display: none;
  }

  .disc-item__pair {
    grid-template-columns: 1fr !important;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
  }

  .disc-item__side--right {
    text-align: left !important;
  }

  .disc-item__name {
    font-size: var(--fs-16);
  }

  .disc-item__connector {
    padding: var(--space-1) 0;
    justify-content: flex-start;
  }

  .disc-item__symbol {
    width: 24px;
    height: 24px;
    font-size: 14px;
  }

  .disc-item__aside {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .disc-item__score-num {
    font-size: var(--fs-24);
  }

  .disc-item__detail {
    padding: 0 var(--space-4) var(--space-4);
  }

  .disc-item__detail-grid {
    grid-template-columns: 1fr !important;
    gap: var(--space-3);
  }

  /* === About page === */
  .about-page {
    padding: var(--space-7) var(--space-4) var(--space-8);
  }

  .about-page__title {
    font-size: clamp(40px, 10vw, 56px);
  }

  .about-page__lede {
    font-size: var(--fs-16);
  }

  .about-page__section-title {
    font-size: var(--fs-24);
  }

  .about-page__section p {
    font-size: var(--fs-14);
  }

  .about-stats {
    grid-template-columns: 1fr !important;
    padding: var(--space-4);
  }

  .about-team {
    padding: var(--space-4);
    gap: var(--space-3);
  }

  .about-team__avatar {
    width: 44px;
    height: 44px;
    font-size: var(--fs-20);
  }
}

/* === Very small phone (≤480px) === */
@media (max-width: 480px) {
  .home__brand {
    font-size: 40px;
  }

  .ph-hero__meta {
    font-size: var(--fs-11, 11px);
  }

  .site-header__nav {
    gap: var(--space-3);
  }

  .searchbox__wrapper {
    padding: 4px 4px 4px var(--space-3);
  }

  .home__daily-title {
    font-size: var(--fs-20);
  }

  .home__daily-badge {
    display: none;
  }
}

/* === Tap target (iOS) === */
@media (hover: none) and (pointer: coarse) {
  .btn,
  .chip,
  .searchbox__submit,
  .result-card,
  .disc-card,
  .ph-cross__card,
  .disc-item__header {
    -webkit-tap-highlight-color: transparent;
  }

  /* Disable hover-based transforms on touch devices */
  .result-card:hover,
  .disc-card:hover,
  .ph-cross__card:hover,
  .disc-item:hover {
    transform: none;
  }
}

/* === Reduced motion === */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}