/* Vui Học Tiếng Trung v2.5.11 - mobile writing studio redesign
   Goal: fluid mobile layout, no viewport-wide hard locks, no clipped content. */

@media (max-width: 860px) {
  /* Full-height app surface, but keep scrolling inside the modal body only. */
  #featureModal:has(.writing-studio-dialog) {
    align-items: stretch;
    overflow: hidden;
  }

  .writing-studio-dialog {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: none;
    height: 100dvh;
    max-height: 100dvh;
    margin: 0;
    border-radius: 0;
    overflow: hidden;
    background: #f4f7fb;
  }

  .writing-studio-dialog .modal-header {
    position: relative;
    top: auto;
    flex: 0 0 auto;
    min-height: 68px;
    padding: calc(10px + env(safe-area-inset-top)) 16px 10px;
    background: rgba(255,255,255,.98);
    border-bottom: 1px solid #e7edf5;
    backdrop-filter: blur(14px);
  }

  .writing-studio-dialog .modal-header > div {
    min-width: 0;
  }

  .writing-studio-dialog .modal-kicker {
    display: block;
    margin-bottom: 3px;
    font-size: 10px;
    line-height: 1.1;
    letter-spacing: .12em;
  }

  .writing-studio-dialog .modal-header h2 {
    margin: 0;
    font-size: clamp(21px, 5.7vw, 26px);
    line-height: 1.15;
    text-wrap: balance;
  }

  .writing-studio-dialog .modal-close {
    width: 44px;
    height: 44px;
    min-height: 44px;
    flex: 0 0 44px;
    font-size: 28px;
    background: #f0f4f8;
  }

  .writing-studio-dialog .modal-body {
    flex: 1 1 auto;
    min-height: 0;
    width: 100%;
    max-width: none;
    padding: 0 0 calc(22px + env(safe-area-inset-bottom)) !important;
    overflow-x: clip;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .writing-studio {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: none;
    overflow: visible;
  }

  /* Search becomes a compact native-like toolbar. */
  .writing-search-panel {
    width: 100%;
    max-width: none;
    padding: 10px 12px 7px;
    border: 0;
    border-bottom: 1px solid #e6edf5;
    border-radius: 0;
    background: #fff;
    overflow: visible;
    box-shadow: 0 4px 16px rgba(24,54,93,.04);
  }

  .writing-search-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 120px;
    gap: 8px;
    width: 100%;
  }

  .writing-search-box {
    height: 48px;
    border-radius: 14px;
    background: #f5f8fc;
  }

  .writing-search-box > span {
    padding-left: 12px;
    font-size: 18px;
  }

  .writing-search-box input {
    min-width: 0;
    height: 46px;
    padding: 0 38px 0 9px;
    font-size: 16px;
  }

  .writing-search-box button {
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
  }

  .writing-search-form select {
    width: 120px;
    height: 48px;
    padding: 0 9px;
    border-radius: 14px;
    background: #fff;
    font-size: 14px;
  }

  .writing-search-submit,
  .writing-search-help {
    display: none !important;
  }

  /* Only this strip scrolls horizontally. Nothing else is width-locked. */
  .writing-search-results {
    display: flex;
    flex-wrap: nowrap;
    align-items: stretch;
    gap: 8px;
    width: auto;
    max-width: none;
    min-height: 0;
    margin: 0 -12px;
    padding: 8px 12px 3px;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-padding-inline: 12px;
    scroll-snap-type: x proximity;
    overscroll-behavior-inline: contain;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .writing-search-results::-webkit-scrollbar {
    display: none;
  }

  .writing-search-result {
    position: relative;
    flex: 0 0 86px;
    width: 86px;
    min-width: 86px;
    max-width: 86px;
    height: 90px;
    padding: 8px 7px 6px;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto;
    grid-template-areas: "hanzi" "pinyin";
    place-items: center;
    gap: 2px;
    border-radius: 14px;
    overflow: hidden;
    scroll-snap-align: start;
    background: #fff;
  }

  .writing-search-result strong {
    grid-area: hanzi;
    max-width: 100%;
    font: 700 38px/1 "Noto Serif SC", "Songti SC", serif;
    color: #14233b;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: clip;
  }

  .writing-search-result span {
    grid-area: pinyin;
    width: 100%;
    font-size: 11px;
    line-height: 1.15;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .writing-search-result small {
    display: none;
  }

  .writing-search-result i {
    position: absolute;
    top: 5px;
    right: 5px;
    grid-area: auto;
    padding: 2px 5px;
    font-size: 9px;
    line-height: 1.2;
    background: rgba(237,245,255,.94);
  }

  .writing-search-result.active {
    border-color: #1672f6;
    background: #eef6ff;
    box-shadow: 0 0 0 2px rgba(22,114,246,.08) inset;
  }

  .writing-search-idle,
  .writing-no-results,
  .writing-search-results > .loading-state,
  .writing-search-results > .error-box {
    flex: 1 0 calc(100vw - 24px);
    min-width: 0;
    padding: 10px 2px 6px;
    font-size: 13px;
  }

  /* Let the useful controls flow naturally instead of keeping a desktop sidebar. */
  .writing-workbench {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    min-height: 0;
    padding: 0 10px;
    overflow: visible;
  }

  .writing-sidebar {
    display: contents;
  }

  /* The desktop word card duplicates the current-word header and wastes mobile height. */
  .writing-word-card {
    display: none !important;
  }

  .writing-sidebar-section {
    display: none !important;
  }

  /* Character switcher is shown only for multi-character words (JS adds data-char-count). */
  .writing-sidebar-section[data-char-count]:not([data-char-count="0"]):not([data-char-count="1"]) {
    order: 1;
    display: grid !important;
    gap: 8px;
    padding: 10px 12px;
    border: 1px solid #e2e9f2;
    border-radius: 15px;
    background: #fff;
  }

  .writing-sidebar-section[data-char-count]:not([data-char-count="0"]):not([data-char-count="1"]) .writing-section-title {
    min-width: 0;
  }

  .writing-sidebar-section[data-char-count]:not([data-char-count="0"]):not([data-char-count="1"]) .writing-section-title h3 {
    margin: 0;
    font-size: 14px;
  }

  .writing-char-tabs {
    display: flex;
    gap: 8px;
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 1px 1px 3px;
    scrollbar-width: none;
  }

  .writing-char-tabs::-webkit-scrollbar {
    display: none;
  }

  .writing-char-tabs button {
    flex: 0 0 54px;
    width: 54px;
    min-width: 54px;
    height: 54px;
    aspect-ratio: auto;
    border-radius: 13px;
  }

  .writing-char-tabs button strong {
    font-size: 30px;
  }

  .writing-main {
    order: 2;
    width: 100%;
    max-width: none;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    overflow: visible;
  }

  /* One compact current-word bar instead of a large card + duplicate header. */
  .writing-current-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 9px;
    width: 100%;
    padding: 11px 12px;
    border: 1px solid #e1e8f1;
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 5px 18px rgba(26,59,99,.04);
  }

  .writing-current-header > div:first-child {
    min-width: 0;
  }

  .writing-current-line {
    display: flex;
    align-items: center;
    gap: 9px;
    min-width: 0;
  }

  .writing-current-line strong {
    min-width: 0;
    max-width: 100%;
    font-size: clamp(36px, 10vw, 48px);
    line-height: 1.05;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .writing-current-line .badge {
    flex: 0 0 auto;
  }

  .writing-current-meta {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 3px 10px;
    min-width: 0;
    margin-top: 2px;
  }

  .writing-current-meta span:first-child {
    color: #1672f6;
    font-size: 15px;
    font-weight: 800;
  }

  .writing-current-meta span:last-child {
    min-width: 0;
    color: #536176;
    font-size: 13px;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .writing-header-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 7px;
    width: 100%;
  }

  .writing-header-actions button {
    min-width: 0;
    min-height: 40px;
    padding: 7px 6px;
    border-radius: 11px;
    font-size: 12px;
    line-height: 1.2;
    white-space: normal;
  }

  /* Mode switch stays compact. It is the only sticky control inside the scroll body. */
  .writing-mode-tabs {
    position: sticky;
    top: 0;
    z-index: 8;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 4px;
    width: 100%;
    margin: 8px 0;
    padding: 4px;
    border: 1px solid rgba(222,230,240,.9);
    border-radius: 14px;
    background: rgba(244,247,251,.94);
    backdrop-filter: blur(12px);
    box-shadow: 0 5px 14px rgba(22,49,85,.06);
  }

  .writing-mode-tabs button {
    min-width: 0;
    min-height: 44px;
    padding: 7px 4px;
    font-size: 11px;
    line-height: 1.15;
    overflow-wrap: normal;
  }

  .writing-mode-tabs button span {
    display: inline;
    margin: 0 3px 0 0;
  }

  .writing-mode-panel {
    width: 100%;
    max-width: none;
    padding: 10px;
    border: 1px solid #e1e8f1;
    border-radius: 17px;
    background: #fff;
    overflow: visible;
  }

  .writing-order-layout,
  .writing-quiz-layout,
  .writing-free-layout {
    width: 100%;
    min-width: 0;
    grid-template-columns: minmax(0, 1fr);
  }

  .writing-order-stage,
  .writing-quiz-stage,
  .writing-free-stage {
    width: 100%;
    min-width: 0;
  }

  .writing-stage-label {
    width: 100%;
    margin-bottom: 7px;
  }

  /* Fluid square: no 100vw math and no fixed min-width. */
  .writer-grid-shell,
  .free-canvas-shell {
    box-sizing: border-box;
    inline-size: 100%;
    max-inline-size: 520px;
    min-inline-size: 0;
    margin-inline: auto;
    aspect-ratio: 1;
  }

  .hanzi-writer-target,
  .hanzi-writer-target > svg,
  .free-canvas-shell canvas {
    display: block;
    width: 100% !important;
    max-width: 100% !important;
    height: 100% !important;
    max-height: 100% !important;
  }

  .writing-primary-tools {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 7px;
    width: 100%;
    margin-top: 9px;
  }

  .writing-primary-tools .primary {
    grid-column: 1 / -1;
  }

  .writing-primary-tools button {
    min-width: 0;
    min-height: 42px;
    padding: 8px;
    line-height: 1.2;
    white-space: normal;
  }

  .writing-settings-row {
    width: 100%;
    gap: 9px 14px;
    justify-content: space-between;
  }

  .stroke-step-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 7px;
  }

  .stroke-step-card {
    min-width: 0;
  }
}

@media (max-width: 520px) {
  .writing-search-form {
    grid-template-columns: minmax(0, 1fr) 112px;
  }

  .writing-search-form select {
    width: 112px;
  }

  .writing-current-line strong {
    font-size: clamp(34px, 11vw, 46px);
  }

  .writing-header-actions button {
    font-size: 11px;
  }
}

@media (max-width: 380px) {
  .writing-search-panel {
    padding-inline: 9px;
  }

  .writing-search-results {
    margin-inline: -9px;
    padding-inline: 9px;
  }

  .writing-search-form {
    grid-template-columns: minmax(0, 1fr) 92px;
    gap: 6px;
  }

  .writing-search-form select {
    width: 92px;
    font-size: 12px;
  }

  .writing-workbench {
    padding-inline: 7px;
  }

  .writing-header-actions {
    gap: 5px;
  }

  .writing-mode-tabs button {
    font-size: 10px;
  }

  .stroke-step-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}