/* Mobile-only overrides. Keep desktop/base styles in styles.css. */

@media (max-width: 640px) {
  .mobile-page-return-bar,
  .hsk-lesson-hero,
  .daily-course-header,
  .vocab-page-heading,
  .account-mobile-header {
    background: #16a34a !important;
    color: #ffffff;
  }

  .app-desktop-content:has(> .mobile-page-return-bar) {
    padding-top: 48px !important;
  }

  .mobile-page-return-bar {
    position: fixed !important;
    top: 0;
    left: 50%;
    z-index: 1000;
    width: min(100vw, 430px);
    transform: translateX(-50%);
  }

  .screen-account .account-layout {
    padding-top: 48px !important;
  }

  .screen-account .account-mobile-header {
    position: fixed !important;
    top: 0;
    left: 50%;
    z-index: 1000;
    width: min(100vw, 430px);
    transform: translateX(-50%);
  }

  .recent-activities-drawer {
    width: min(100vw, 430px);
  }

  .recent-activities-drawer-header {
    min-height: 72px;
    padding: 16px 18px;
  }

  .recent-activities-drawer-header h2 {
    font-size: 20px;
  }

  .recent-activities-drawer-body {
    padding: 8px 18px calc(22px + env(safe-area-inset-bottom));
  }

  .hsk-lesson-hero,
  .daily-course-header,
  .vocab-page-heading,
  .account-mobile-header,
  .home-mobile-topbar {
    position: sticky;
    top: 0;
    z-index: 90;
  }

  .hsk-lesson-hero,
  .daily-course-header,
  .vocab-page-heading {
    border-radius: 0;
  }

  .vocab-page-heading {
    display: none !important;
  }

  .hsk-lesson-hero {
    min-height: 48px !important;
    height: 48px;
    padding: 8px 16px !important;
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr) 34px !important;
    align-items: center;
    background: #16a34a !important;
    border: 0;
    box-shadow: none;
    color: #ffffff;
  }

  .hsk-lesson-hero::before {
    background: none;
    opacity: 1;
  }

  .hsk-lesson-hero::after,
  .hsk-lesson-hero-art {
    display: none !important;
  }

  .hsk-lesson-hero .hsk-lesson-back-btn {
    position: absolute !important;
    left: 16px !important;
    top: 50% !important;
    width: 28px;
    height: 28px;
    min-height: 28px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.9);
    background: rgba(0, 0, 0, 0.08);
    color: #ffffff;
    transform: translateY(-50%) !important;
    z-index: 3;
  }

  .hsk-lesson-hero .hsk-lesson-back-btn:hover {
    transform: translateY(-50%) !important;
  }

  .hsk-lesson-hero .hsk-lesson-back-btn svg {
    width: 15px;
    height: 15px;
  }

  .hsk-lesson-hero h1 {
    position: absolute;
    inset: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 58px;
    color: #ffffff;
    font-size: 0 !important;
    line-height: 1;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .hsk-lesson-hero h1::before {
    content: attr(data-mobile-title);
    color: #ffffff;
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 900;
    line-height: 1;
  }

  .vocab-page-heading h1,
  .vocab-page-heading p,
  .account-mobile-header h1,
  .vocab-page-heading h1,
  .vocab-page-heading p {
    color: #ffffff !important;
  }

  .daily-course-layout > .daily-course-hero {
    display: none;
  }

  .hsk-lesson-screen,
  .daily-course-layout,
  .vocab-layout,
  .account-layout {
    scroll-padding-top: 56px;
  }

  body:has(#practiceScreen:not(.hidden)) {
    background: #f1fbf7;
    overflow: auto;
  }

  #practiceScreen:not(.hidden) {
    grid-template-rows: auto auto auto auto;
    gap: 6px;
    height: auto;
    min-height: 100dvh;
    padding: 4px 5px calc(8px + env(safe-area-inset-bottom));
    background: #f1fbf7;
    overflow-y: auto;
    align-content: start;
  }

  #practiceScreen .practice-top,
  #practiceScreen .practice-meta,
  #practiceScreen .practice-layout,
  #practiceScreen .function-dock {
    width: 100%;
    max-width: 390px;
  }

  #practiceScreen .practice-top {
    display: grid;
    grid-template-columns: clamp(24px, 7vw, 32px) minmax(0, 1fr) auto;
    gap: 5px;
    align-items: center;
  }

  #practiceScreen .practice-close-btn {
    width: clamp(24px, 7vw, 32px);
    min-height: clamp(24px, 7vw, 32px);
    border-radius: 6px;
    font-size: clamp(14px, 3.8vw, 18px);
  }

  #practiceScreen .mode-switch {
    justify-self: end;
    gap: 4px;
    padding: 2px;
    border-radius: 999px;
  }

  #practiceScreen .mode-switch button {
    min-height: clamp(20px, 6vw, 28px);
    padding: 0 clamp(8px, 2.4vw, 12px);
    border-radius: 999px;
    font-size: clamp(8px, 2.25vw, 11px);
    font-weight: 850;
  }

  #practiceScreen .thin-progress {
    grid-column: 1 / -1;
    order: 4;
    height: 4px;
    margin-top: 0;
    border-radius: 999px;
  }

  #practiceScreen .practice-meta {
    grid-row: 2;
    align-self: end;
    justify-self: center;
    display: block;
    margin: 2px auto -2px;
    padding: 0 1px !important;
    position: relative;
    z-index: 2;
  }

  #practiceScreen .practice-meta strong,
  #practiceScreen .practice-meta span {
    display: block;
  }

  #practiceScreen .practice-meta strong {
    font-size: clamp(11px, 3.2vw, 14px);
    line-height: 1.2;
  }

  #practiceScreen .practice-meta span {
    margin-top: 1px;
    font-size: clamp(8px, 2.2vw, 11px);
    line-height: 1;
  }

  #practiceScreen .practice-layout {
    grid-row: 3;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
    gap: 6px;
    height: auto;
    min-height: 0;
    overflow: visible;
  }

  #practiceScreen .exercise-card {
    min-height: clamp(300px, 50dvh, 430px);
    height: auto;
    justify-content: start;
    border: 1px solid rgba(203, 213, 225, 0.9);
    border-radius: 9px;
    padding: 8px 7px 10px;
    box-shadow: 0 5px 14px rgba(15, 23, 42, 0.06);
  }

  #practiceScreen .exercise-card::before,
  #practiceScreen .exercise-card::after {
    display: none;
  }

  #practiceScreen .stage-pill {
    padding: clamp(4px, 1.2vw, 6px) clamp(9px, 2.6vw, 13px);
    border-radius: 999px;
    font-size: clamp(8px, 2.2vw, 11px);
    box-shadow: none;
  }

  #practiceScreen .exercise-card > p {
    margin: 7px 0 0;
    font-size: clamp(8px, 2.15vw, 11px);
    font-weight: 600;
    line-height: 1.25;
  }

  #practiceScreen .exercise-card h1,
  #practiceScreen .exercise-card h1.practice-prompt--compact,
  #practiceScreen .exercise-card h1.practice-prompt--small,
  #practiceScreen .exercise-card h1.practice-prompt--tiny {
    max-width: 100%;
    margin: 8px auto 9px;
    font-size: clamp(20px, 7.4vw, 32px);
    line-height: 1.08;
  }

  #practiceScreen .slot-row {
    width: 100%;
    max-width: min(78%, 300px);
    margin: 0 auto;
    gap: 4px;
  }

  #practiceScreen .answer-slot {
    width: 100%;
    min-width: 0;
  }

  #practiceScreen .slot-line {
    min-height: clamp(40px, 10vw, 58px);
    padding: 5px 7px 4px;
    border-bottom-width: 3px;
    border-radius: 5px 5px 0 0;
  }

  #practiceScreen .answer-slot input {
    width: 100%;
    font-size: clamp(10px, 3.1vw, 16px);
    font-weight: 800;
  }

  #practiceScreen .answer-slot input::placeholder {
    color: rgba(106, 114, 130, 0.56);
  }

  #practiceScreen .answer-slot strong {
    font-size: clamp(16px, 5vw, 24px);
  }

  #practiceScreen .answer-slot > span,
  #practiceScreen .slot-progress-text {
    margin-top: 3px;
    font-size: clamp(7px, 2vw, 10px) !important;
    line-height: 1;
  }

  #practiceScreen .memory-panel {
    display: block;
    min-height: clamp(118px, 28vw, 152px);
    height: auto;
    border: 1px solid rgba(203, 213, 225, 0.9);
    border-radius: 8px;
    padding: 8px 10px;
    background: #ffffff;
    box-shadow: 0 5px 14px rgba(15, 23, 42, 0.05);
    overflow: visible;
  }

  #practiceScreen .memory-panel::before {
    width: 5px;
  }

  #practiceScreen .memory-panel::after {
    display: none;
  }

  #practiceScreen .memory-panel .eyebrow {
    margin: 0 0 3px;
    color: #059669;
    font-size: clamp(7px, 2vw, 10px);
    font-weight: 950;
    text-transform: uppercase;
  }

  #practiceScreen .memory-panel strong {
    min-height: 0;
    font-size: clamp(19px, 6vw, 28px);
    line-height: 1;
  }

  #practiceScreen .memory-panel span {
    margin-top: 2px;
    font-size: clamp(8px, 2.25vw, 11px);
    font-weight: 900;
  }

  #practiceScreen .memory-panel p:not(.eyebrow) {
    margin: 5px 0 0;
    font-size: clamp(8px, 2.25vw, 11px);
    line-height: 1.35;
  }

  #practiceScreen .memory-panel div {
    display: none;
  }

  #practiceScreen .function-dock {
    width: 100%;
    max-width: 390px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 5px;
    margin: 0 auto;
    padding: 6px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.08);
  }

  #practiceScreen .function-dock button,
  #practiceScreen .function-dock button:not(.primary) {
    width: 100%;
    min-width: 0;
    min-height: clamp(24px, 10vw, 40px);
    height: clamp(24px, 10vw, 40px);
    padding: 0 6px;
    border-width: 1px;
    border-radius: 6px;
    font-size: clamp(8px, 2.7vw, 12px);
    font-weight: 850;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
  }

  #practiceScreen .function-dock span {
    margin-right: 0;
    font-size: clamp(8px, 2.7vw, 12px);
    line-height: 1;
  }

  #practiceScreen .function-dock #prevBtn {
    background: #f8fafc;
    border-color: #dbeafe;
    color: #94a3b8;
  }

  #practiceScreen .function-dock #playBtn {
    background: #eff8ff;
    border-color: #bfdbfe;
    color: #0f172a;
  }

  #practiceScreen .function-dock #slowBtn {
    background: #ecfdf5;
    border-color: #bbf7d0;
    color: #0f172a;
  }

  #practiceScreen .function-dock #saveBtn {
    background: #fff7ed;
    border-color: #fed7aa;
    color: #0f172a;
  }

  #practiceScreen .function-dock #answerBtn {
    background: #f5edff;
    border-color: #d8b4fe;
    color: #0f172a;
  }

  #practiceScreen .function-dock #nextBtn,
  #practiceScreen .function-dock button.primary {
    grid-column: 1 / -1;
    min-height: clamp(26px, 10.4vw, 42px);
    height: clamp(26px, 10.4vw, 42px);
    border-radius: 6px;
    background: #16c96f;
    border-color: #11b864;
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(22, 201, 111, 0.25);
  }
}

@media (max-width: 900px) {
  .account-side-nav,
  .account-help-card {
    display: none !important;
  }
}