/*
 * Shared responsive foundation.
 * Loaded after page-specific styles so every screen size follows the same
 * spacing, overflow and interaction rules.
 */

:root {
  --layout-gutter: clamp(12px, 2.5vw, 40px);
  --layout-gutter-small: clamp(10px, 3vw, 18px);
  --tap-target: 44px;
}

html {
  width: 100%;
  min-width: 0;
  overflow-x: clip;
}

body {
  width: 100%;
  min-width: 0;
  overflow-x: clip;
}

:where(main, section, article, aside, header, footer, nav, div, form, fieldset) {
  min-width: 0;
}

:where(img, video, canvas, iframe) {
  max-width: 100%;
}

:where(input, select, textarea, button) {
  max-width: 100%;
}

:where(p, h1, h2, h3, h4, a, button, label, strong, span) {
  overflow-wrap: break-word;
}

.container {
  width: min(var(--container), calc(100% - var(--layout-gutter) - var(--layout-gutter))) !important;
  max-width: none;
}

.page-title h1,
.photos-page-title h1 {
  text-wrap: balance;
}

.card,
.submit-card,
.login-card,
.settings-card,
.messages-sidebar,
.messages-panel,
.topics-list-panel,
.topics-detail-panel {
  max-width: 100%;
}

.login-form,
.settings-form-stack,
.message-compose,
.submit-train-rows,
.submit-train-primary {
  min-width: 0;
}

.login-form :where(input, select, textarea),
.settings-form-stack :where(input, select, textarea),
.submit-card :where(input, select, textarea) {
  width: 100%;
  min-width: 0;
}

[role="dialog"] {
  max-width: calc(100dvw - var(--layout-gutter) - var(--layout-gutter)) !important;
  max-height: calc(100dvh - var(--layout-gutter) - var(--layout-gutter)) !important;
  overflow: auto;
  overscroll-behavior: contain;
}

/* Keep navigation comfortable on iPads and folding devices in landscape. */
.nav-inner {
  padding-right: max(var(--layout-gutter), env(safe-area-inset-right)) !important;
  padding-left: max(var(--layout-gutter), env(safe-area-inset-left)) !important;
}

@media (max-width: 1200px) {
  body .navbar .menu-btn {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
  }

  .nav-utility .nav-settings-link,
  .nav-utility .nav-profile-link {
    display: none !important;
  }

  .nav-mobile-item {
    display: list-item;
  }

  body .navbar .nav-links {
    position: fixed !important;
    top: 0;
    right: -110%;
    width: min(88vw, 360px) !important;
    height: 100dvh !important;
    margin: 0 !important;
    padding: max(16px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) max(20px, env(safe-area-inset-bottom)) 16px !important;
    overflow-y: auto;
    overscroll-behavior: contain;
    border-left: 1px solid rgba(255, 255, 255, 0.12);
    background: linear-gradient(165deg, #111 0%, #17191e 100%) !important;
    box-shadow: -20px 0 50px rgba(0, 0, 0, 0.35);
    transition: right 0.24s ease;
  }

  body .navbar .nav-links.active {
    right: 0 !important;
  }

  body .navbar .close-btn {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    width: var(--tap-target);
    height: var(--tap-target);
    margin-left: auto;
    color: #fff;
  }

  body .navbar .nav-links ul {
    width: 100%;
    margin-top: 18px !important;
    flex-direction: column;
    align-items: stretch !important;
    gap: 4px !important;
    padding: 0 !important;
    border: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  body .navbar .nav-links li,
  body .navbar .nav-links a {
    width: 100%;
  }

  body .navbar .nav-links a,
  body .navbar.scrolled .nav-links a {
    padding: 12px 8px !important;
    border: 0 !important;
    border-radius: 10px !important;
    background: transparent !important;
    box-shadow: none !important;
    color: #fff !important;
  }

  body .navbar .nav-links a.active,
  body .navbar.scrolled .nav-links a.active {
    background: rgba(77, 163, 255, 0.14) !important;
    color: #73b7ff !important;
  }

  .nav-inner:has(.nav-links.active) .nav-utility {
    opacity: 0;
    pointer-events: none;
  }

  .nav-notifications-panel {
    width: min(380px, calc(100dvw - var(--layout-gutter) - var(--layout-gutter))) !important;
  }
}

/* Tablets and foldables. */
@media (max-width: 900px) {
  .page-title {
    padding-top: calc(88px + env(safe-area-inset-top)) !important;
    padding-bottom: clamp(10px, 2vw, 20px) !important;
  }

  .page-title h1,
  .photos-page-title h1 {
    font-size: clamp(2rem, 7vw, 3.5rem) !important;
    line-height: 1.02 !important;
  }

  .section {
    padding-top: clamp(24px, 5vw, 42px);
    padding-bottom: clamp(32px, 7vw, 56px);
  }

  .settings-grid,
  .profile-grid,
  .messages-layout,
  .community-command-grid,
  .community-feature-layout,
  .community-tools-layout,
  .community-activity-grid {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  body.settings-page .settings-summary-card {
    position: static !important;
    top: auto !important;
  }

  body.settings-page .settings-nav {
    display: flex !important;
    gap: 8px;
    width: 100%;
    padding-bottom: 4px;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scrollbar-width: thin;
    scroll-snap-type: inline proximity;
  }

  body.settings-page .settings-nav-btn {
    flex: 0 0 auto;
    width: auto !important;
    min-width: max-content;
    scroll-snap-align: start;
  }

  .messages-page .messages-sidebar,
  .messages-page .messages-panel {
    min-height: 0 !important;
  }

  .station-action-row,
  .live-map-actions,
  .submit-row,
  .profile-public-actions,
  .topic-create-actions {
    flex-wrap: wrap !important;
  }
}

/* Phones and narrow foldable panes. */
@media (max-width: 620px) {
  :root {
    --layout-gutter: var(--layout-gutter-small);
  }

  .nav-inner {
    min-height: 62px;
    gap: 8px;
    padding-block: 8px !important;
  }

  .brand {
    gap: 7px;
  }

  .brand-logo {
    width: 34px !important;
    height: 34px !important;
    flex-basis: 34px;
  }

  .brand-title {
    font-size: 15px !important;
    line-height: 1.05;
  }

  .brand-sub {
    font-size: 9px !important;
  }

  .nav-utility {
    gap: 7px !important;
    margin-left: auto !important;
  }

  .navbar #menuBtn,
  .navbar .nav-icon-btn,
  .navbar .nav-profile-link {
    width: var(--tap-target) !important;
    height: var(--tap-target) !important;
    min-width: var(--tap-target) !important;
    min-height: var(--tap-target) !important;
  }

  .nav-notifications-panel,
  .nav-global-search-panel {
    position: fixed !important;
    top: calc(66px + env(safe-area-inset-top)) !important;
    right: var(--layout-gutter) !important;
    left: var(--layout-gutter) !important;
    width: auto !important;
    max-height: calc(100dvh - 82px - env(safe-area-inset-top)) !important;
  }

  .card,
  .submit-card,
  .login-card,
  .settings-card {
    padding: clamp(16px, 5vw, 24px) !important;
    border-radius: 18px !important;
  }

  .btn,
  button,
  [role="button"] {
    min-height: var(--tap-target);
  }

  input,
  select,
  textarea {
    font-size: 16px !important;
  }

  .login-tabs,
  .login-actions,
  .submit-date-row,
  .submit-date-picker-actions,
  .settings-toggle-grid,
  .settings-notification-grid {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .submit-date-row,
  .submit-image-preview {
    gap: 12px !important;
  }

  .moderation-item,
  .moderation-row,
  .operator-logo-row {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .profile-public-hero,
  .profile-public-dashboard {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .profile-public-actions .btn,
  .station-action-row .btn,
  .live-map-actions .btn {
    flex: 1 1 160px;
  }

  .footer-inner {
    padding-right: max(16px, env(safe-area-inset-right)) !important;
    padding-bottom: max(18px, env(safe-area-inset-bottom)) !important;
    padding-left: max(16px, env(safe-area-inset-left)) !important;
  }

  .footer-top {
    align-items: flex-start !important;
  }

  .footer-left,
  .footer-bottom {
    padding-left: 0 !important;
  }

  .icons {
    display: flex !important;
    flex-wrap: wrap !important;
    gap: 8px !important;
  }

  .icons a {
    width: 42px !important;
    height: 42px !important;
  }

  table {
    display: block;
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
  }
}

/* Photo controls get an intentional layout instead of accidental wrapping. */
@media (min-width: 521px) and (max-width: 840px) {
  .photos-command {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .photos-command-actions {
    display: grid !important;
    grid-template-columns: repeat(3, minmax(0, 1fr)) 52px 52px !important;
  }

  .photos-submit-link,
  .photos-cache-refresh {
    width: 52px !important;
    min-width: 52px !important;
  }
}

@media (max-width: 520px) {
  .photos-page-title {
    padding-inline: var(--layout-gutter) !important;
  }

  .photos-command,
  .photos-layout {
    width: calc(100% - var(--layout-gutter) - var(--layout-gutter)) !important;
  }

  .photos-command-actions {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 9px !important;
  }

  .photos-command-actions .photos-reset-btn,
  .photos-command-actions .photos-cache-refresh {
    width: 100% !important;
    min-width: 0 !important;
    min-height: 48px !important;
    height: 48px !important;
    padding-inline: 10px !important;
    white-space: nowrap;
  }

  .photos-command-actions #photoSortPlace {
    grid-column: 1;
    grid-row: 1;
  }

  .photos-command-actions #photoSortCompany {
    grid-column: 2;
    grid-row: 1;
  }

  .photos-command-actions #photoSortTrain {
    grid-column: 1;
    grid-row: 2;
  }

  .photos-command-actions .photos-cache-refresh {
    grid-column: 2 !important;
    grid-row: 2 !important;
  }

  .photos-command-actions .photos-submit-link {
    display: none !important;
  }

  .photos-gallery-shell .photo-grid,
  .photos-gallery-shell .photo-grid:has(.station-photo-card-detailed) {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .community-hero-actions,
  .community-final-actions {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .archive-tabs {
    justify-content: flex-start !important;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scrollbar-width: thin;
  }

  .archive-tabs button {
    flex: 0 0 auto !important;
  }
}

@media (max-width: 360px) {
  .brand-sub {
    display: none !important;
  }

  .brand-title {
    font-size: 14px !important;
  }

  .nav-inner {
    padding-inline: 9px !important;
  }

  .nav-utility {
    gap: 5px !important;
  }

  .navbar #menuBtn,
  .navbar .nav-icon-btn,
  .navbar .nav-profile-link {
    --tap-target: 42px;
  }

  .page-title h1,
  .photos-page-title h1 {
    font-size: clamp(1.9rem, 11vw, 2.5rem) !important;
  }
}

@media (max-width: 300px) {
  :root {
    --layout-gutter: 8px;
    --tap-target: 40px;
  }

  .brand-text {
    display: none !important;
  }

  .brand-logo {
    width: 32px !important;
    height: 32px !important;
    flex-basis: 32px;
  }
}

/* Landscape phones and short foldable panes should not waste half the height. */
@media (max-height: 560px) and (min-width: 560px) {
  .page-title {
    padding-top: calc(74px + env(safe-area-inset-top)) !important;
  }

  .hero,
  .community-hero {
    min-height: 100dvh !important;
    height: auto !important;
  }

  .community-hero-inner {
    min-height: 100dvh !important;
    padding-top: calc(76px + env(safe-area-inset-top)) !important;
    padding-bottom: max(24px, env(safe-area-inset-bottom)) !important;
  }

  .community-hero-copy h1 {
    max-width: 14ch;
    margin-block: 10px !important;
    font-size: clamp(2rem, 5vw, 2.85rem) !important;
  }

  .community-hero-copy p {
    font-size: 14px !important;
    line-height: 1.45 !important;
  }

  .community-hero-actions {
    margin-top: 14px !important;
    gap: 8px !important;
  }

  .community-hero-actions .btn {
    min-height: 40px !important;
    padding-block: 8px !important;
  }

  body.topics-page,
  body.topics-page .topic-hub-main {
    height: auto !important;
    min-height: 100dvh;
    overflow: auto !important;
  }
}

/* Very wide CSS viewports occur on ultrawide monitors and during zoom-out. */
@media (min-width: 1800px) {
  :root {
    --container: min(82vw, 5600px);
  }

  body.topics-page .topic-hub-shell,
  .archive-hub,
  .messages-page .messages-page-content,
  body.profile-page main > .section {
    width: min(82vw, 5600px) !important;
    max-width: none !important;
  }

  body.topics-page .topic-hub-layout {
    grid-template-columns: minmax(360px, 26%) minmax(0, 1fr);
  }

  .messages-page .messages-layout {
    grid-template-columns: minmax(360px, 24%) minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}