/* Dedicated portrait layout. Load after styles.css. */
.mobile-appbar,
.mobile-progress {
  display: none;
}

@media (max-width: 650px) {
  html {
    -webkit-text-size-adjust: 100%;
    scroll-padding-top: calc(72px + env(safe-area-inset-top));
  }

  body {
    min-width: 280px;
    background: #f4f7f3;
  }

  .shell {
    display: block;
    min-height: 100vh;
    min-height: 100dvh;
  }

  .sidebar,
  .topbar,
  .quiz-aside,
  .view-quiz .quiz-heading,
  .view-quiz .footer {
    display: none;
  }

  .mobile-appbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    position: sticky;
    top: 0;
    z-index: 10;
    min-height: 62px;
    padding: calc(7px + env(safe-area-inset-top)) max(14px, env(safe-area-inset-right)) 7px max(14px, env(safe-area-inset-left));
    background: #ffffff;
    border-bottom: 1px solid #e3e9e0;
  }

  .mobile-appbar .brand-title,
  .mobile-appbar .mobile-brand,
  .mobile-appbar .brand {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    color: #254b35;
    font-size: 16px;
    font-weight: 650;
    letter-spacing: .02em;
  }

  .mobile-appbar .brand-icon {
    width: 31px;
    height: 33px;
    border-radius: 9px;
  }

  .mobile-appbar .brand small {
    display: none;
  }

  .mobile-appbar-actions,
  .mobile-tools {
    display: flex;
    align-items: center;
    gap: 3px;
    flex-shrink: 0;
  }

  .mobile-appbar button,
  .mobile-icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    min-width: 44px;
    min-height: 46px;
    padding: 9px 8px;
    border: 0;
    border-radius: 9px;
    background: transparent;
    color: #5d7663;
    font-size: 12px;
  }

  .mobile-appbar button:hover {
    background: #eff5ea;
  }

  .main {
    width: 100%;
    min-width: 0;
    margin: 0;
    padding: 0 max(16px, env(safe-area-inset-right)) calc(24px + env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  }

  .content,
  .home-grid,
  .home-grid > div,
  .quiz-layout,
  .question-card,
  .result-card {
    min-width: 0;
    max-width: 100%;
  }

  .hero {
    display: block;
    margin: 26px 0 20px;
  }

  .hero .eyebrow {
    margin-bottom: 8px;
    color: #6d876e;
    font-size: 11px;
    letter-spacing: .08em;
  }

  .hero h1 {
    margin-bottom: 7px;
    font-size: 28px;
    line-height: 1.4;
  }

  .hero p {
    font-size: 13px;
    line-height: 1.7;
  }

  .sample-badge,
  .bank-badge {
    display: inline-flex;
    margin-top: 12px;
    padding: 6px 10px;
    font-size: 11px;
  }

  .home-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .setup-card {
    padding: 20px;
    border-radius: 16px;
  }

  .card-kicker {
    margin-bottom: 18px;
  }

  .card-kicker h2 {
    font-size: 16px;
  }

  .step-label,
  .start-note {
    display: none;
  }

  .mode-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 11px;
  }

  .mode-card {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr);
    grid-template-rows: auto auto;
    align-content: center;
    column-gap: 12px;
    row-gap: 4px;
    min-height: 88px;
    padding: 15px 42px 15px 15px;
    border-radius: 11px;
  }

  .mode-icon {
    grid-column: 1;
    grid-row: 1 / 3;
    align-self: center;
    width: 38px;
    height: 40px;
    margin: 0;
  }

  .mode-card strong {
    grid-column: 2;
    margin: 0;
    font-size: 15px;
    line-height: 1.5;
  }

  .mode-card small {
    grid-column: 2;
    font-size: 11px;
    line-height: 1.5;
    overflow-wrap: anywhere;
  }

  .mode-card .radio-dot {
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
    width: 17px;
    height: 17px;
  }

  .selection-note {
    margin: 15px 0 18px;
    font-size: 11px;
    line-height: 1.65;
  }

  .primary,
  .secondary {
    min-height: 49px;
    padding: 12px 17px;
    font-size: 14px;
  }

  .setup-card > .primary {
    min-height: 53px;
    font-size: 16px;
  }

  .resume-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px;
    padding: 13px;
    margin-bottom: 18px;
  }

  .resume-card strong {
    font-size: 12px;
    line-height: 1.6;
  }

  .resume-card p {
    margin-top: 5px;
    font-size: 11px;
    line-height: 1.6;
  }

  .resume-card button {
    min-height: 46px;
    padding: 9px 11px;
    font-size: 12px;
  }

  .right-stack {
    display: block;
  }

  .summary-card {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px 8px;
    padding: 20px;
  }

  .summary-card .small-heading {
    grid-column: 1 / 3;
    align-self: center;
    margin: 0;
    font-size: 13px;
  }

  .summary-card .distribution {
    grid-column: 3;
    grid-row: 1;
    justify-content: flex-end;
    gap: 4px;
    float: none;
    margin: 0;
    transform: none;
  }

  .summary-card .distribution b {
    font-size: 28px;
  }

  .summary-card .distribution span {
    font-size: 11px;
  }

  .summary-card .type-bar {
    grid-column: 1 / -1;
    width: 100%;
    margin: 0;
  }

  .summary-card .type-row {
    display: grid;
    gap: 6px;
    margin: 0;
    font-size: 12px;
  }

  .summary-card .type-row strong {
    font-size: 15px;
  }

  .summary-card .bank-source {
    grid-column: 1 / -1;
    margin: 0;
    padding-top: 3px;
    color: #8a9882;
    font-size: 11px;
    line-height: 1.7;
  }

  .rule-card {
    display: none;
  }

  .info-strip {
    padding: 13px 15px;
    margin-top: 15px;
    font-size: 11px;
    line-height: 1.8;
  }

  .footer {
    display: block;
    margin-top: 22px;
    color: #93a08c;
    font-size: 10px;
  }

  .footer span + span {
    margin-top: 4px;
  }

  /* A compact progress strip replaces the desktop statistics card. */
  .mobile-progress {
    display: block;
    margin: 17px 1px 16px;
  }

  .mobile-progress-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px 12px;
    color: #7d8f77;
    font-size: 12px;
    line-height: 1.6;
    font-variant-numeric: tabular-nums;
  }

  .mobile-progress-label strong,
  .mobile-progress-label b {
    color: #355c3b;
    font-weight: 600;
  }

  .mobile-progress-label button {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    min-height: 44px;
    margin: -10px -4px -10px 0;
    padding: 10px 4px;
    border: 0;
    background: transparent;
    color: #7d8f77;
    font-size: 12px;
  }

  .mobile-progress .progress-track {
    height: 4px;
    margin: 9px 0 0;
  }

  .quiz-layout {
    display: block;
  }

  .question-card {
    padding: 20px 17px;
    border-radius: 15px;
  }

  .question-meta {
    gap: 7px;
    margin: 0 0 15px;
  }

  .pill {
    padding: 5px 8px;
    font-size: 11px;
    line-height: 1.3;
  }

  .question-number {
    font-size: 11px;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
  }

  .question-card h2 {
    font-size: 18px;
    line-height: 1.75;
    font-weight: 550;
    margin: 0 0 16px;
    overflow-wrap: anywhere;
    word-break: normal;
    scroll-margin-top: 78px;
  }

  .question-hint {
    margin: -4px 0 15px;
    font-size: 11px;
    line-height: 1.5;
  }

  .option-list {
    gap: 10px;
  }

  .option {
    position: relative;
    align-items: flex-start;
    gap: 11px;
    min-height: 60px;
    padding: 14px 35px 14px 12px;
    border-radius: 10px;
    font-size: 16px;
    line-height: 1.7;
    overflow-wrap: anywhere;
  }

  .option-label {
    width: 27px;
    min-width: 27px;
    height: 28px;
    margin-top: 0;
    font-size: 13px;
  }

  .option > span:nth-child(2) {
    min-width: 0;
    flex: 1;
    overflow-wrap: anywhere;
  }

  /* Always reserve this slot, so revealed answer icons never reflow options. */
  .answer-icon {
    position: absolute;
    top: 20px;
    right: 11px;
    width: 16px;
    height: 16px;
    margin: 0;
  }

  /* Submit and next share one stable position, before the feedback block. */
  .question-actions {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    position: static;
    margin: 17px 0 0;
    padding: 0;
    border: 0;
  }

  .question-actions .primary {
    order: 1;
    width: 100%;
    min-width: 0;
    min-height: 52px;
    padding: 13px 18px;
    font-size: 16px;
    line-height: 24px;
  }

  .question-actions .action-hint {
    order: 2;
    display: block;
    max-width: 100%;
    width: 100%;
    height: 18px;
    min-height: 18px;
    margin: 0;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 11px;
    line-height: 18px;
  }

  .feedback {
    margin-top: 14px;
    padding: 15px;
    border-radius: 10px;
    overflow-wrap: anywhere;
  }

  .feedback-title {
    gap: 7px;
    margin-bottom: 8px;
    font-size: 14px;
    line-height: 1.6;
  }

  .answer-text {
    margin: 0 0 4px;
    font-size: 14px;
    line-height: 1.7;
  }

  .feedback p:last-child {
    font-size: 14px;
    line-height: 1.7;
  }

  .feedback-mastery {
    display: inline-block;
    margin-left: 10px;
    font-size: 12px;
  }

  .tail-note {
    margin: 0 0 14px;
    padding: 10px 12px;
    font-size: 12px;
    line-height: 1.65;
  }

  .version-panel {
    margin-top: 15px;
    font-size: 13px;
    line-height: 1.8;
    overflow-wrap: anywhere;
  }

  .version-panel summary {
    min-height: 46px;
    padding: 12px 0;
    color: #6e7f66;
    cursor: pointer;
  }

  .version-panel p,
  .version-panel li {
    font-size: 13px;
    line-height: 1.8;
  }

  .version-panel ul,
  .version-panel ol {
    padding-left: 23px;
  }

  .result-card {
    margin: 24px auto 0;
    padding: 26px 19px;
    border-radius: 16px;
  }

  .result-card h1 {
    font-size: 24px;
    line-height: 1.5;
  }

  .result-card > p {
    font-size: 12px;
    line-height: 1.8;
  }

  .result-stats {
    gap: 6px;
    padding: 22px 0;
    margin-top: 22px;
  }

  .result-stat {
    min-width: 0;
  }

  .result-stat b {
    font-size: 23px;
    line-height: 1.35;
    overflow-wrap: anywhere;
  }

  .result-stat span {
    font-size: 11px;
    line-height: 1.6;
  }

  .result-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .result-item {
    min-width: 0;
    gap: 9px;
    padding: 12px;
    font-size: 12px;
  }

  .result-item span:last-child {
    font-size: 10px;
  }

  .result-actions {
    gap: 10px;
    margin-top: 22px;
  }

  .result-actions button {
    min-height: 50px;
  }

  .result-mistakes summary {
    min-height: 48px;
    padding: 13px 0;
    text-align: left;
    font-size: 13px;
  }

  dialog {
    width: calc(100% - 24px);
    max-width: 520px;
    max-height: calc(100vh - 32px);
    max-height: calc(100dvh - 32px - env(safe-area-inset-top) - env(safe-area-inset-bottom));
    padding: 22px 18px;
    border-radius: 16px;
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  dialog.progress-dialog {
    width: calc(100% - 24px);
    max-width: 520px;
  }

  dialog h2 {
    margin: 0 40px 17px 0;
    font-size: 18px;
  }

  dialog p,
  dialog li {
    font-size: 13px;
    line-height: 1.85;
    overflow-wrap: anywhere;
  }

  .modal-close {
    top: 10px;
    right: 8px;
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    padding: 0;
  }

  dialog .primary,
  dialog .secondary {
    min-height: 48px;
    font-size: 13px;
  }

  .progress-summary {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px 12px;
    margin-bottom: 17px;
    font-size: 12px;
    line-height: 1.7;
  }

  .progress-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 8px;
    max-width: 100%;
  }

  .progress-grid .q-dot {
    aspect-ratio: auto;
    height: 44px;
    min-height: 43px;
    font-size: 12px;
  }

  .pager {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-top: 19px;
    font-size: 12px;
  }

  .pager button {
    min-height: 46px;
    min-width: 66px;
    padding: 10px 12px;
    font-size: 12px;
  }
}

/* Keep both self-rating buttons visible together in portrait layouts. */
@media (max-width: 650px) {
  .practice-switch {
    margin-bottom: 20px;
  }

  .practice-choice {
    min-height: 47px;
    padding: 10px 8px;
    font-size: 15px;
  }

  .study-answer {
    margin-top: 20px;
    padding: 15px 14px;
  }

  .study-answer h3 {
    font-size: 12px;
  }

  .study-answer-list li {
    gap: 8px;
    font-size: 17px;
    line-height: 1.85;
  }

  .study-answer-list strong {
    font-size: 15px;
  }

  .question-actions.study-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 20px;
    min-height: 0;
  }

  .study-actions button {
    min-height: 54px;
    padding: 14px 10px;
    font-size: 17px;
  }
}

@media (max-width: 350px) {
  .mobile-appbar {
    gap: 4px;
    padding-left: 12px;
    padding-right: 10px;
  }

  .mobile-appbar .brand-title,
  .mobile-appbar .mobile-brand,
  .mobile-appbar .brand {
    font-size: 14px;
    gap: 6px;
  }

  .mobile-appbar button {
    gap: 3px;
    padding-left: 6px;
    padding-right: 6px;
    font-size: 11px;
  }

  .main {
    padding-left: 12px;
    padding-right: 12px;
  }

  .setup-card,
  .summary-card {
    padding: 17px;
  }

  .question-card {
    padding: 18px 14px;
  }

  .question-meta {
    gap: 5px;
  }

  .pill,
  .question-number {
    font-size: 10px;
  }

  .question-card h2 {
    font-size: 17px;
  }

  .option {
    gap: 9px;
    padding-left: 10px;
    padding-right: 31px;
    font-size: 15px;
  }

  .option-label {
    min-width: 25px;
    width: 25px;
  }

  .answer-icon {
    right: 9px;
  }

  .result-stat b {
    font-size: 20px;
  }

  .resume-card {
    padding: 11px;
    gap: 7px;
  }

  .resume-card button {
    padding-left: 9px;
    padding-right: 9px;
    font-size: 11px;
  }
}