/* ===== Trainer (train/) ===== */
/* The shell, bar, side list, stage, dialogs and empty state are the web
   app's, from app.css; this file adds what only the trainer needs. */

.trainer-shell:not([data-view="study"]):not([data-view="done"]) .trainer-bar__study,
.trainer-shell[data-view="study"] .trainer-bar__home,
.trainer-shell[data-view="done"] .trainer-bar__home,
.trainer-shell[data-view="done"] .study-bar__left {
    display: none;
}

.trainer-shell[data-view="study"],
.trainer-shell[data-view="done"] {
    grid-template-columns: minmax(0, 1fr);
}

.trainer-shell[data-view="study"] .app-side,
.trainer-shell[data-view="done"] .app-side {
    display: none;
}

.trainer-stage {
    overflow-y: auto;
}

.trainer-h2 {
    font-size: 1.2rem;
    margin: var(--space-xl) 0 var(--space-md);
}

.trainer-h3 {
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
    font-weight: 600;
}

/* The site's .btn-sm is about 27px tall; the web app's bar buttons are
   36px, and the trainer's match them, dialogs included. */
.trainer .btn-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 36px;
    padding: 0 16px;
    font-size: 0.9rem;
}

.trainer .trainer-drill .btn {
    min-height: 42px;
    padding: 0 22px;
    font-size: 0.95rem;
}

.trainer-deck__actions .btn {
    min-width: 84px;
}

.btn:disabled,
.btn:disabled:hover {
    opacity: 0.45;
    cursor: default;
    transform: none;
    box-shadow: none;
}

/* Notice: app.css's banner, in the trainer's three tones */
.trainer-notice {
    border-left-color: var(--accent-primary);
}

.trainer-notice .app-banner__message {
    color: var(--text-secondary);
}

.trainer-notice[data-kind="ok"] {
    border-left-color: var(--accent-success);
}

.trainer-notice[data-kind="ok"] .app-banner__message {
    color: var(--text-primary);
}

.trainer-notice[data-kind="error"] {
    border-left-color: var(--accent-warning);
}

.trainer-notice[data-kind="error"] .app-banner__message {
    color: var(--accent-warning);
}

/* Side: the decks on this device */
.trainer-side {
    overflow-y: auto;
}

.trainer-side__title {
    margin: var(--space-md) var(--space-lg) var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.trainer-side__add {
    align-self: flex-start;
    margin: var(--space-md) var(--space-lg) var(--space-lg);
    font-size: 0.9rem;
}

.trainer-decks,
.trainer-community {
    list-style: none;
    margin: 0;
    padding: 0;
}

.trainer-deck {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--border);
}

.trainer-deck:last-child {
    border-bottom: 1px solid var(--border);
}

.trainer-deck__main {
    min-width: 0;
}

.trainer-deck__title {
    font-size: 1rem;
    margin: 0 0 2px;
    overflow-wrap: anywhere;
}

.trainer-deck__meta {
    margin: 0;
    color: var(--text-dim);
    font-size: 0.8rem;
}

.trainer-deck__counts {
    display: flex;
    gap: var(--space-md);
    margin: var(--space-xs) 0 0;
    font-size: 0.85rem;
}

.trainer-count--due {
    color: var(--accent-success);
}

.trainer-count--new {
    color: var(--accent-primary);
}

.trainer-deck__actions {
    display: flex;
    flex: none;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-xs);
}

.trainer-deck__remove {
    color: var(--text-dim);
    font-size: 0.8rem;
}

/* Stage: home */
.trainer-home {
    display: flex;
    flex: 1 0 auto;
    flex-direction: column;
    padding: var(--space-lg) var(--space-xl) var(--space-2xl);
}

.trainer-dash {
    width: 100%;
    max-width: 880px;
    margin: 0 auto;
}

.trainer-install {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-md);
    width: 100%;
    max-width: 880px;
    margin: 0 auto var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    border: 1px solid var(--accent-primary);
    border-radius: 8px;
    background: var(--bg-elevated);
}

.trainer-install p {
    margin: 0;
    flex: 1 1 280px;
    color: var(--text-secondary);
}

.trainer-install strong {
    color: var(--text-primary);
}

.trainer-today {
    padding: var(--space-lg);
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-elevated);
}

.trainer-today__summary {
    margin: 0;
    font-size: 1.05rem;
}

/* Drills */
.trainer-drills {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-lg);
}

.trainer-drill {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-lg);
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-elevated);
}

.trainer-drill__title {
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
}

.trainer-drill__text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    flex: 1;
}

.trainer-drill__best {
    color: var(--accent-success);
    font-size: 0.9rem;
}

.trainer-drill__best:empty {
    display: none;
}

.trainer-drill-options {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: var(--space-sm) var(--space-lg);
    margin-top: var(--space-md);
}

.trainer-drill-options .app-field {
    min-width: 220px;
}

.trainer-drill-options__note {
    margin: 0 0 var(--space-sm);
    color: var(--text-dim);
    font-size: 0.85rem;
}

/* Add a deck dialog */
.trainer-community {
    max-height: 260px;
    overflow-y: auto;
}

.trainer-community__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border);
}

.trainer-community__row:last-child {
    border-bottom: none;
}

.trainer-community__text {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.trainer-community__title {
    overflow-wrap: anywhere;
}

.trainer-community__meta,
.trainer-community__empty {
    color: var(--text-dim);
    font-size: 0.85rem;
}

.app-dialog__note a,
.app-empty__sample a {
    color: var(--accent-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.trainer-backup__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

/* ===== Study view ===== */

.study-bar__deck {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-secondary);
}

.study-bar__left {
    flex: none;
    color: var(--text-dim);
}

/* The board takes all the width it can while staying fully in view: its
   height is capped at the window height minus the nav, the app bar (57px)
   and padding, and 880/600 is the board SVG's aspect ratio. */
.study-layout {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: var(--space-xl);
    padding: var(--space-lg) var(--space-xl);
}

.study-board {
    position: sticky;
    top: var(--space-lg);
    flex: 1 1 0;
    min-width: 0;
    max-width: calc((100vh - var(--app-nav, 73px) - 57px - 3rem) * 880 / 600);
    max-width: calc((100dvh - var(--app-nav, 73px) - 57px - 3rem) * 880 / 600);
}

.study-panel {
    flex: 0 0 clamp(300px, 28vw, 560px);
    min-width: 0;
    font-size: clamp(1rem, 0.55rem + 0.45vw, 1.3rem);
}

.study-board svg {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 6px;
}

.study-context {
    margin: 0 0 var(--space-xs);
    color: var(--text-dim);
    font-size: 0.85em;
}

.study-prompt {
    font-size: 1.25em;
    margin-bottom: var(--space-md);
}

.study-choices {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.study-choice {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    width: 100%;
    min-height: 48px;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font: inherit;
    font-family: var(--font-code);
    font-size: 1em;
    text-align: left;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}

/* Touch screens keep :hover on the last tapped spot, which in a drill is
   where the next position's button appears. */
@media (hover: hover) {
    .study-choice:hover:not(:disabled) {
        border-color: var(--accent-primary);
    }
}

.study-choice:disabled {
    cursor: default;
    color: var(--text-secondary);
}

.study-choice__key {
    flex: none;
    width: 1.75em;
    height: 1.75em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    background: var(--bg-surface);
    font-family: var(--font-primary);
    font-size: 0.8em;
    font-weight: 600;
    color: var(--text-secondary);
}

.study-choice.is-answer {
    border-color: var(--accent-success);
    color: var(--text-primary);
    background: rgba(95, 184, 120, 0.12);
}

.study-choice.is-close {
    border-color: var(--accent-warning);
    color: var(--text-primary);
}

.study-choice.is-wrong {
    border-color: var(--accent-danger);
    color: var(--text-primary);
}

.study-play {
    padding: var(--space-md);
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-elevated);
}

.study-play__hint {
    margin: 0 0 var(--space-xs);
    color: var(--text-secondary);
    font-size: 0.9em;
}

.study-play__move {
    min-height: 1.5em;
    margin: var(--space-xs) 0 0;
    font-family: var(--font-code);
    font-size: 1.05em;
}

.study-views {
    margin-bottom: var(--space-md);
}

.study-board svg {
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
}

.study-skip {
    margin-top: var(--space-md);
    color: var(--text-dim);
    font-size: 0.9em;
}

.study-answer {
    margin-top: var(--space-lg);
}

.study-verdict {
    padding: var(--space-md);
    border-left: 3px solid var(--accent-danger);
    background: var(--bg-elevated);
    border-radius: 4px;
    font-weight: 500;
}

.study-verdict[data-verdict="best"] {
    border-left-color: var(--accent-success);
}

.study-verdict[data-verdict="close"] {
    border-left-color: var(--accent-warning);
}

.study-analysis {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9em;
}

.study-analysis th {
    padding: var(--space-xs) var(--space-sm);
    color: var(--text-dim);
    font-weight: 500;
    font-size: 0.9em;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.study-analysis th + th {
    text-align: right;
}

.study-analysis td {
    padding: var(--space-sm);
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

.study-analysis__move {
    font-family: var(--font-code);
}

.study-analysis__num {
    text-align: right;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.study-analysis tr.is-best td:first-child {
    box-shadow: inset 3px 0 0 var(--accent-success);
}

.study-analysis tr.is-picked {
    background: var(--bg-surface);
}

.study-analysis tr[data-severity="small"] td:last-child {
    color: var(--text-secondary);
}

.study-analysis tr[data-severity="mid"] td:last-child {
    color: var(--accent-warning);
}

.study-analysis tr[data-severity="big"] td:last-child {
    color: var(--accent-danger);
}

.study-tag,
.study-level {
    display: inline-block;
    margin-left: var(--space-sm);
    padding: 0 6px;
    border-radius: 4px;
    font-family: var(--font-primary);
    font-size: 0.78em;
    line-height: 1.6;
    vertical-align: 1px;
}

.study-tag {
    background: var(--bg-surface);
    color: var(--text-primary);
}

.study-level {
    color: var(--text-dim);
    border: 1px solid var(--border);
}

.study-more {
    margin-top: var(--space-sm);
    font-size: 0.85em;
}

.study-chances {
    margin-top: var(--space-lg);
}

.study-chances__label {
    margin-bottom: var(--space-xs);
    color: var(--text-dim);
    font-size: 0.8em;
}

.study-chances__table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85em;
    font-variant-numeric: tabular-nums;
}

.study-chances__table th,
.study-chances__table td {
    padding: 2px var(--space-sm);
    text-align: right;
}

.study-chances__table th {
    color: var(--text-dim);
    font-weight: 500;
}

.study-chances__table tr > th:first-child {
    text-align: left;
}

.study-note {
    margin-top: var(--space-lg);
    padding: var(--space-md);
    border-radius: 6px;
    background: var(--bg-elevated);
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    font-size: 0.9em;
}

.study-note a {
    text-decoration: underline;
    text-underline-offset: 2px;
}

.study-source {
    margin-top: var(--space-md);
    color: var(--text-dim);
    font-size: 0.8em;
}

.study-grades {
    position: sticky;
    bottom: 0;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    padding: var(--space-sm) 0;
    padding-bottom: max(var(--space-sm), env(safe-area-inset-bottom));
    background: var(--bg-secondary);
}

.study-grade {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    min-height: 52px;
    padding: var(--space-sm) var(--space-xs);
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font: inherit;
    cursor: pointer;
}

.study-grade__name {
    font-weight: 600;
    font-size: 0.95em;
}

.study-grade__when {
    color: var(--text-dim);
    font-size: 0.75em;
}

.study-grade:hover {
    border-color: var(--text-dim);
}

.study-grade.is-suggested {
    border-width: 2px;
}

.study-grade--again.is-suggested { border-color: var(--accent-danger); }
.study-grade--hard.is-suggested { border-color: var(--accent-warning); }
.study-grade--good.is-suggested { border-color: var(--accent-success); }
.study-grade--easy.is-suggested { border-color: var(--accent-primary); }

.study-grade:focus-visible,
.study-choice:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.trainer-done {
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
    text-align: center;
}

.trainer-done__next {
    color: var(--text-secondary);
}

.trainer-done__missed {
    margin: var(--space-xl) auto 0;
    text-align: left;
}

.trainer-done__missed-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm) var(--space-md);
}

.trainer-done__missed-head .trainer-h3 {
    margin: 0;
}

.trainer-done__hint {
    margin: var(--space-xs) 0 var(--space-md);
    color: var(--text-dim);
    font-size: 0.85rem;
}

.missed-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-md);
}

.missed-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    padding: var(--space-sm);
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-elevated);
    color: var(--text-primary);
    font: inherit;
    text-align: left;
    cursor: pointer;
}

@media (hover: hover) {
    .missed-card:hover {
        border-color: var(--accent-primary);
    }
}

.missed-card:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.missed-card__board svg {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 4px;
}

.missed-card__text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 0 var(--space-xs) var(--space-xs);
    font-size: 0.85rem;
}

.missed-card__kind {
    color: var(--text-dim);
    font-size: 0.75rem;
}

.missed-card__line {
    font-family: var(--font-code);
    overflow-wrap: anywhere;
}

.missed-card__line--you {
    color: var(--accent-danger);
}

.missed-card__lost {
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.study-miss-nav {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.trainer-done__more {
    margin-top: var(--space-sm);
    color: var(--text-dim);
    font-size: 0.85rem;
}

.trainer-done__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
}

.study-drill-end {
    margin-top: var(--space-lg);
    width: 100%;
}

.study-bar__left[data-drill] {
    color: var(--text-primary);
    font-size: 1.05rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

/* Storm: a clock readable at a glance, and a bar that empties with it */
.study-bar__left[data-drill="storm"] {
    display: flex;
    align-items: baseline;
    gap: var(--space-md);
}

.drill-clock {
    font-size: 1.9rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.02em;
}

.drill-score {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
}

.study-bar__left[data-urgent="soon"] .drill-clock {
    color: var(--accent-warning);
}

.study-bar__left[data-urgent="final"] .drill-clock {
    color: var(--accent-danger);
}

.trainer-shell[data-view="study"] .app-bar {
    position: relative;
}

.storm-meter {
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 5px;
    background: var(--bg-surface);
}

.storm-meter span {
    display: block;
    height: 100%;
    background: var(--accent-success);
    transition: width 0.25s linear;
}

.storm-meter[data-urgent="soon"] span {
    background: var(--accent-warning);
}

.storm-meter[data-urgent="final"] span {
    background: var(--accent-danger);
}

@media (prefers-reduced-motion: reduce) {
    .storm-meter span {
        transition: none;
    }
}


/* Installed app: the site's navigation would leave the app */
@media (display-mode: standalone) {
    .nav,
    .footer,
    .tool-info {
        display: none;
    }
}

/* Tablets and phones: app.css stacks the shell into one scrolling column */
@media (max-width: 900px) {
    .trainer-stage,
    .trainer-side {
        overflow: visible;
    }

    .trainer-shell .app-bar__actions {
        width: auto;
        margin-left: auto;
    }

    /* Touch targets */
    .trainer .btn-sm,
    .trainer .trainer-drill .btn,
    .trainer-shell .app-icon-btn {
        min-height: 44px;
    }

    /* Studying on a phone: the whole screen for the position */
    body.is-studying .nav,
    body.is-studying .footer {
        display: none;
    }

    .trainer-shell[data-view="study"] .app-bar,
    .trainer-shell[data-view="done"] .app-bar {
        position: sticky;
        top: 0;
        z-index: 10;
        flex-wrap: nowrap;
        padding-top: max(var(--space-sm), env(safe-area-inset-top));
    }

    .trainer-shell[data-view="study"] .app-bar__status,
    .trainer-shell[data-view="done"] .app-bar__status {
        order: 0;
        flex-basis: auto;
    }

    .trainer-home {
        padding: var(--space-md);
    }

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

    .study-layout {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-md);
        padding: var(--space-sm) var(--space-md);
    }

    .study-board {
        position: static;
        flex: none;
        max-width: none;
    }

    .study-panel {
        flex: none;
    }

    .study-prompt {
        font-size: 1.1em;
    }
}