/*
 * ============================================================================
 * 6502ish — Mobile Experience
 * ============================================================================
 *
 * Mobile-specific overrides. Loaded AFTER style.css so rules here cascade
 * over the desktop baseline at mobile breakpoints. Structured as:
 *
 *   1.  Mobile tokens + body class hooks
 *   2.  Typography + contrast
 *   3.  Touch targets
 *   4.  Layout primitives (container, grid, sidebar stack, footer)
 *   5.  Navigation (hamburger, slide-in panel, overlay, scroll-lock)
 *   6.  Forms
 *   7.  Mobile-intro modal
 *   8.  Inherently-desktop inline notice
 *   9.  Component translations (forums, messages, profile, stats, files…)
 *
 * Breakpoints match style.css:
 *   mobile  <= 767px
 *   tablet   768–991px
 *   desktop >= 992px
 *
 * Design: docs/superpowers/specs/2026-04-18-mobile-experience-design.md
 * ============================================================================
 */

/* ------------------------------------------------------------------ */
/* 1. Tokens + body hooks                                             */
/* ------------------------------------------------------------------ */

:root {
  --mobile-tap-min: 44px;
  --mobile-input-h: 48px;
  --mobile-nav-width: 85vw;
  --mobile-nav-max: 320px;
  --z-mobile-modal: 320;
  --z-mobile-overlay: 315;
}

/* Scroll-lock applied by JS when the hamburger panel or the intro modal opens. */
body.nav-open,
body.mobile-modal-open {
  overflow: hidden;
  touch-action: none;
}

/* ------------------------------------------------------------------ */
/* 2. Typography + contrast                                           */
/* ------------------------------------------------------------------ */

@media (max-width: 767px) {
  html {
    /* 16px keeps iOS Safari from auto-zooming input fields. */
    font-size: 16px;
  }

  body {
    line-height: 1.55;
  }

  h1 { font-size: var(--font-size-3xl); line-height: 1.2; }
  h2 { font-size: var(--font-size-2xl); line-height: 1.25; }
  h3 { font-size: var(--font-size-xl);  line-height: 1.3;  }
  h4 { font-size: var(--font-size-lg);  line-height: 1.35; }

  .page-header { padding-bottom: var(--space-4); }

  /* Restore link underlines on touch — hover doesn't exist here. */
  .main-content a:not(.btn):not(.nav-link):not(.dropdown-item):not(.nav-icon-link):not(.navbar-logo):not(.tab):not(.user-menu-trigger) {
    text-decoration: underline;
    text-underline-offset: 2px;
  }

  /* Bump muted text one tier brighter so 4.5:1 holds on CRT-black bg. */
  .text-muted {
    color: var(--color-text-secondary);
  }
}

/* ------------------------------------------------------------------ */
/* 3. Touch targets                                                   */
/* ------------------------------------------------------------------ */

@media (max-width: 767px) {
  .btn,
  .btn-sm {
    min-height: var(--mobile-tap-min);
    min-width: var(--mobile-tap-min);
    padding-left: var(--space-4);
    padding-right: var(--space-4);
    font-size: var(--font-size-base);
  }
  .btn-lg {
    min-height: 52px;
    font-size: var(--font-size-lg);
  }

  .nav-link,
  .dropdown-item {
    min-height: var(--mobile-tap-min);
    display: flex;
    align-items: center;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .nav-icon-link {
    min-height: var(--mobile-tap-min);
    min-width: var(--mobile-tap-min);
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .nav-icon { width: 20px; height: 20px; }

  .checkbox, .radio {
    width: 22px;
    height: 22px;
  }

  /* Breathing room around anything that looks clickable inline. */
  .inline-form button,
  .inline-form .btn {
    margin-top: var(--space-2);
    margin-bottom: var(--space-2);
  }
}

/* ------------------------------------------------------------------ */
/* 4. Layout primitives                                               */
/* ------------------------------------------------------------------ */

@media (max-width: 767px) {
  .container {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
    max-width: 100%;
  }

  /* Collapse every declared multi-col grid to a single column. */
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4,
  .grid-cols-5,
  .grid-cols-6 {
    grid-template-columns: 1fr !important;
  }

  /* Stack any sidebar layout, main content first. */
  .layout-sidebar,
  .dashboard-layout,
  .profile-layout,
  .settings-layout {
    display: block !important;
  }

  .layout-sidebar > .sidebar,
  .dashboard-layout > .sidebar,
  .profile-layout > .sidebar,
  .settings-layout > .sidebar {
    position: static !important;
    width: 100% !important;
    margin-top: var(--space-6);
    left: auto;
    transform: none;
  }

  .card {
    padding: var(--space-4);
    border-radius: var(--radius-md);
  }

  .card-body { padding: var(--space-4); }
  .card-header { padding: var(--space-4); }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .footer {
    padding-top: var(--space-6);
    padding-bottom: var(--space-8);
    font-size: var(--font-size-sm);
    text-align: center;
  }
  .footer .container { padding: 0 var(--space-4); }
  .footer a { display: inline-block; padding: var(--space-2) var(--space-3); }
}

/* ------------------------------------------------------------------ */
/* 5. Navigation — hamburger + slide-in panel                         */
/* ------------------------------------------------------------------ */

@media (max-width: 767px) {
  .navbar {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: var(--color-bg-body);
    border-bottom: 1px solid var(--color-border);
  }

  .navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    min-height: 56px;
  }

  .navbar-brand {
    position: static;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
  }

  .site-logo { max-height: 32px; }
  .navbar-logo { margin-right: auto; }

  /* Top-bar Log In / Register for guests on mobile. The drawer copy of
     these is suppressed below so there's only one place to tap. */
  .navbar-mobile-guest-actions {
    display: flex;
    gap: var(--space-2);
    flex-shrink: 0;
  }
  .navbar-mobile-guest-actions .btn {
    min-height: 40px;
    min-width: 0;
    padding: 0 var(--space-3);
    font-size: var(--font-size-sm);
  }

  /* Hide the in-drawer Log In / Register links on mobile for guests;
     they now live in the top bar next to the hamburger. */
  .navbar-menu .navbar-actions > a[href="/login"],
  .navbar-menu .navbar-actions > a[href="/register"] {
    display: none;
  }

  /* Hamburger icon morphs to X when open. */
  .navbar-toggle {
    display: flex;
    position: static;
    align-self: center;
  }
  .navbar-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .navbar-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
  }
  .navbar-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  /* Panel is a sheet sliding in from the left. */
  .navbar-menu {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--mobile-nav-width);
    max-width: var(--mobile-nav-max);
    height: 100vh;
    height: 100dvh;
    background: var(--color-bg-card);
    border-right: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: var(--space-6) var(--space-4);
    overflow-y: auto;
    transform: translateX(-105%);
    transition: transform var(--transition-base);
    z-index: var(--z-mobile-modal);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
  }

  .navbar-menu.open {
    transform: translateX(0);
    display: flex;
  }

  .navbar-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    width: 100%;
  }

  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-lg);
  }
  .nav-link:hover { background: var(--color-bg-hover); }

  /* Dropdowns become flat nested lists inside the drawer. */
  .nav-dropdown { width: 100%; position: static; display: block !important; }
  .nav-dropdown > button {
    width: 100%;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-lg);
  }
  .nav-dropdown .user-menu-dropdown {
    position: static !important;
    display: none;
    min-width: 0 !important;
    width: 100%;
    box-shadow: none;
    border: none;
    padding: 0 0 var(--space-2) var(--space-6);
    background: transparent;
  }
  .nav-dropdown .user-menu-dropdown.open { display: block; }
  .nav-dropdown .user-menu-dropdown .dropdown-item {
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
  }

  .navbar-actions {
    width: 100%;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
  }

  .navbar-search {
    order: -1;
    width: 100%;
    display: flex;
    gap: var(--space-2);
  }
  .navbar-search-input {
    flex: 1;
    min-height: var(--mobile-input-h);
    font-size: var(--font-size-base);
  }
  .navbar-search-btn { min-width: var(--mobile-tap-min); }

  .user-menu { width: 100%; position: static; }
  .user-menu-trigger {
    width: 100%;
    justify-content: flex-start;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
  }
  .user-menu-name { flex: 1; }
  .user-menu-dropdown { position: static !important; width: 100%; box-shadow: none; }
  .user-menu-dropdown.open {
    display: block !important;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-top: var(--space-2);
  }
  .user-menu-dropdown .dropdown-item {
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
  }

  /* Drawer overlay. Clicks dismiss the drawer (see app.js). */
  .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
    z-index: var(--z-mobile-overlay);
  }
  body.nav-open .nav-overlay {
    opacity: 1;
    pointer-events: auto;
  }
}

/* Hide the theme switcher on mobile — mobile is locked to the light theme
   (see base.php / auth.php head script). Switching would not persist and
   would fight the force-light script on the next page load. */
html.is-mobile-ua .theme-switcher-item,
html.is-mobile-ua #themeSwitcherGuest {
  display: none !important;
}

/* Default state for the desktop viewport: the mobile top-bar guest
   action strip is hidden; guests use the drawer copy. */
.navbar-mobile-guest-actions { display: none; }

/* ------------------------------------------------------------------ */
/* 6. Forms                                                           */
/* ------------------------------------------------------------------ */

@media (max-width: 767px) {
  .form-input,
  .form-select,
  textarea.form-input {
    width: 100%;
    min-height: var(--mobile-input-h);
    font-size: var(--font-size-base);
    padding: var(--space-3) var(--space-4);
  }
  textarea.form-input { min-height: 120px; }

  .form-row {
    flex-direction: column;
    gap: var(--space-4);
  }
  .form-col { flex: 1 1 100%; width: 100%; }

  .form-label {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-2);
  }
}

/* ------------------------------------------------------------------ */
/* 7. Mobile-intro modal                                              */
/* ------------------------------------------------------------------ */

.mobile-intro-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-bg-modal-overlay);
  z-index: var(--z-mobile-modal);
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}
.mobile-intro-modal.open { display: flex; }

.mobile-intro-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-primary);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-5);
  max-width: 480px;
  width: 100%;
  color: var(--color-text-primary);
  text-align: left;
}

.mobile-intro-logo {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-5);
}
.mobile-intro-logo img {
  max-height: 64px;
  max-width: 70%;
  height: auto;
  width: auto;
  object-fit: contain;
}

.mobile-intro-card h2 {
  margin-top: 0;
  margin-bottom: var(--space-4);
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
  text-align: center;
}

.mobile-intro-card p {
  margin-bottom: var(--space-5);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
}

.mobile-intro-actions {
  display: flex;
  justify-content: center;
}

.mobile-intro-actions .btn {
  min-height: 48px;
  min-width: 160px;
}

/* Full-screen on phones; centered card on tablets+. */
@media (max-width: 575px) {
  .mobile-intro-modal { padding: 0; align-items: stretch; }
  .mobile-intro-card {
    border-radius: 0;
    border: none;
    max-width: none;
    height: 100dvh;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
}

/* ------------------------------------------------------------------ */
/* 8. Inherently-desktop inline notice                                */
/* ------------------------------------------------------------------ */

.desktop-only-notice {
  display: none;
}

@media (max-width: 767px) {
  .desktop-only-notice {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    margin-bottom: var(--space-4);
    background: var(--color-toast-warning-bg);
    border: 1px solid var(--color-warning);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
  }
  .desktop-only-notice-icon {
    flex-shrink: 0;
    color: var(--color-warning);
    font-size: var(--font-size-xl);
  }
}

/* ------------------------------------------------------------------ */
/* 9. Component translations                                          */
/* ------------------------------------------------------------------ */

@media (max-width: 767px) {
  /* ── 9.1 Forums: list + thread ────────────────────────────────── */

  .forum-row,
  .forum-list-item,
  .category-forum {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
  }

  .forum-row .forum-stats,
  .forum-list-item .forum-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
  }

  /* Thread listings inside a forum */
  .thread-row,
  .thread-list-item {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
  }
  .thread-row .thread-meta,
  .thread-list-item .thread-meta {
    flex-wrap: wrap;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
  }

  /* Thread view — keep vote widget + post body side-by-side, just tighter.
     Threaded-depth indentation is flattened on mobile because a 120px
     left-margin on a 375px-wide phone leaves almost no body width. */
  .post-card,
  .forum-post {
    display: flex;
    flex-direction: row;
    gap: var(--space-2);
    padding: var(--space-3);
    margin-left: 0 !important;
  }
  .post-card[data-depth="1"] { border-left: 2px solid var(--color-border); padding-left: var(--space-4); }
  .post-card[data-depth="2"],
  .post-card[data-depth="3"],
  .post-card[data-depth="4"],
  .post-card[data-depth="5"] { border-left: 2px solid var(--color-border); padding-left: var(--space-5); }

  .post-card .vote-widget,
  .forum-post .vote-widget {
    flex-shrink: 0;
    min-width: 32px;
    margin-right: 0;
  }
  .post-card .vote-btn {
    min-height: 32px;
    min-width: 32px;
    font-size: var(--font-size-sm);
  }
  .post-card .vote-score {
    font-size: var(--font-size-sm);
  }

  .post-card .post-body,
  .forum-post .post-body {
    flex: 1;
    min-width: 0;
    width: 100%;
    max-width: 100%;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  .post-card .post-header,
  .forum-post .post-header {
    flex-wrap: wrap;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
  }

  .post-card img,
  .forum-post img,
  .post-body img,
  .post-content img {
    max-width: 100%;
    height: auto;
  }
  .post-body pre,
  .post-content pre {
    overflow-x: auto;
    max-width: 100%;
    font-size: var(--font-size-sm);
  }
  .post-actions,
  .post-meta,
  .post-awards,
  .reaction-bar {
    flex-wrap: wrap;
    gap: var(--space-2);
    opacity: 1 !important;  /* hover-reveal doesn't work on touch */
  }

  /* Compose / reply forms */
  .wysiwyg-editor,
  .wysiwyg,
  .post-editor,
  .thread-compose textarea {
    min-height: 200px;
  }
  .editor-toolbar {
    flex-wrap: wrap;
    gap: var(--space-1);
    padding: var(--space-2);
  }
  .editor-toolbar .btn,
  .editor-toolbar button {
    min-height: 40px;
    min-width: 40px;
    padding: var(--space-2);
  }

  /* ── 9.2 Messages ─────────────────────────────────────────────── */

  .msg-list-item,
  .conversation-row {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
  }
  .msg-list-item .avatar,
  .conversation-row .avatar { flex-shrink: 0; }

  .msg-conv-header {
    position: sticky;
    top: 56px;
    z-index: var(--z-sticky);
    background: var(--color-bg-body);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-3) var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
  }

  .msg-conv-messages {
    padding: var(--space-3);
    overflow-y: auto;
  }

  .msg-conv-composer,
  .message-compose {
    position: sticky;
    bottom: 0;
    background: var(--color-bg-body);
    border-top: 1px solid var(--color-border);
    padding: var(--space-3);
    display: flex;
    gap: var(--space-2);
    align-items: flex-end;
  }
  .msg-conv-composer textarea,
  .message-compose textarea {
    flex: 1;
    min-height: 48px;
    max-height: 30vh;
    resize: none;
  }

  /* ── 9.3 Profile ──────────────────────────────────────────────── */

  .profile-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-4);
  }
  .profile-header .avatar-xl {
    width: 96px;
    height: 96px;
  }

  /* Horizontally scrolling tab strip if tabs overflow. */
  .tab-list,
  .profile-tabs,
  .settings-tabs {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: var(--space-1);
    padding-bottom: var(--space-1);
    scrollbar-width: none;
  }
  .tab-list::-webkit-scrollbar,
  .profile-tabs::-webkit-scrollbar,
  .settings-tabs::-webkit-scrollbar { display: none; }
  .tab,
  .profile-tabs > a,
  .settings-tabs > a {
    flex-shrink: 0;
    min-height: var(--mobile-tap-min);
    padding: var(--space-3) var(--space-4);
    white-space: nowrap;
  }

  .friend-grid,
  .friends-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: var(--space-3);
  }
  .friend-card {
    padding: var(--space-3);
  }

  /* ── 9.4 Stats / online / leaderboards ────────────────────────── */

  .stats-totals,
  .stat-tiles {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }
  .stat-tile,
  .stat-card {
    padding: var(--space-3);
    text-align: center;
  }
  .stat-tile .stat-value,
  .stat-card .stat-value {
    font-size: var(--font-size-2xl);
  }

  .leaderboard,
  .top-list {
    display: flex;
    flex-direction: column;
    gap: 0;
  }
  .leaderboard-row,
  .top-list-row {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
    min-height: var(--mobile-tap-min);
  }
  .leaderboard-row .rank,
  .top-list-row .rank {
    flex-shrink: 0;
    min-width: 2rem;
    font-variant-numeric: tabular-nums;
  }
  .leaderboard-row .name,
  .top-list-row .name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .leaderboard-row .metric,
  .top-list-row .metric {
    flex-shrink: 0;
    font-variant-numeric: tabular-nums;
    font-weight: var(--font-weight-semibold);
  }

  /* Who's online / last callers */
  .online-list,
  .last-callers {
    display: flex;
    flex-direction: column;
  }
  .online-user,
  .last-caller-row {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
  }

  /* ── 9.5 Files / downloads ────────────────────────────────────── */

  .file-list,
  .file-grid,
  .files-table {
    display: flex !important;
    flex-direction: column;
    gap: 0;
  }
  .file-row,
  .file-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
  }
  .file-card .file-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
  }
  .file-card .file-actions {
    margin-top: var(--space-2);
  }

  /* If a table is still present, force it to behave as cards. */
  .files-table thead { display: none; }
  .files-table tbody,
  .files-table tr,
  .files-table td {
    display: block;
    width: 100%;
  }
  .files-table tr {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
  }
  .files-table td {
    padding: var(--space-1) 0;
  }

  /* ── 9.6 Events / achievements / BBS directory ────────────────── */

  .event-grid,
  .achievements-grid,
  .bbs-list,
  .bbs-grid {
    grid-template-columns: 1fr !important;
    display: grid;
    gap: var(--space-3);
  }
  .event-card,
  .achievement-card,
  .bbs-card {
    padding: var(--space-4);
  }
  .achievement-card .achievement-icon,
  .event-card .event-icon { font-size: 2rem; }

  /* ── 9.7 Breadcrumbs ──────────────────────────────────────────── */

  .breadcrumbs {
    flex-wrap: wrap;
    gap: var(--space-1);
    font-size: var(--font-size-sm);
    padding: var(--space-2) 0;
  }

  /* ── 9.8 Tables outside files: horizontal scroll guard ────────── */

  .table-scroll,
  .scroll-x {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* ── 9.9 Images + code inside any card body ───────────────────── */

  .card-body img,
  .card-body video { max-width: 100%; height: auto; }
  .card-body pre   { overflow-x: auto; max-width: 100%; }
  .card-body table { display: block; overflow-x: auto; max-width: 100%; }
}