/* EconoSublime student presentation. Proposed accessible palette; host font inherited. */
.est-student {
    --est-ink: #20324a; --est-muted: #52637a; --est-blue: #245caa; --est-blue-soft: #edf4ff;
    --est-accent: #1194f6; --est-line: #d9e2ee; --est-surface: #f4f7fb;
    --est-amber: #865009; --est-amber-soft: #fff4dc;
    --est-green: #17663b; --est-green-soft: #edf8f1; --est-red: #a12638; --est-red-soft: #fff0f2;
    box-sizing: border-box; max-width: 880px; margin-inline: auto; color: var(--est-ink);
    font-family: inherit; font-size: 1rem; line-height: 1.6; overflow-wrap: anywhere;
}
.est-student *, .est-student *::before, .est-student *::after { box-sizing: border-box; }
.est-student#est-student-root { padding: clamp(1rem, 3vw, 2rem); background: var(--est-surface); border: 1px solid var(--est-line); border-radius: 1.25rem; }
.est-student h1, .est-student h2, .est-student h3, .est-student h4 { color: var(--est-ink); line-height: 1.3; font-family: inherit; font-weight: 700; }
.est-student h1 { margin: 0 0 .5rem; font-size: clamp(1.7rem, 4vw, 2.3rem); letter-spacing: -.025em; }
.est-student h2 { margin: 0; font-size: 1.55rem; }
.est-student h3 { margin: 0 0 .75rem; font-size: 1.15rem; }
.est-student h4 { margin: 0 0 .75rem; font-size: 1.05rem; }
.est-student p { margin-block: .65rem; }
.est-student [hidden] { display: none !important; }
.est-student button, .est-student input { font: inherit; }
.est-student button {
    display: inline-flex; justify-content: center; align-items: center; gap: .35rem;
    min-width: 44px; min-height: 44px; max-width: 100%; padding: .7rem 1rem; border: 1px solid #a7bad4;
    border-radius: .65rem; color: var(--est-blue); background: #fff; font-size: .95rem;
    font-weight: 650; line-height: 1.4; cursor: pointer; text-align: center; white-space: normal;
    word-break: normal; overflow-wrap: normal; text-transform: none; box-shadow: none;
    transition: background-color .15s, border-color .15s;
}
/* Scope the complete action palette; external TEST pseudo rules must not repaint it.
   Number buttons set their own state tokens and never take the action hover. */
.est-student button {
    --est-button-ink: var(--est-blue); --est-button-surface: #fff; --est-button-border: var(--est-blue);
    color: var(--est-button-ink) !important; background-color: var(--est-button-surface) !important;
    border-color: var(--est-button-border) !important; background-image: none !important;
    --est-button-shadow: none; box-shadow: var(--est-button-shadow) !important;
}
.est-student button:not(.est-student-numbers button):is(:hover, :active):not(:disabled) {
    --est-button-ink: #fff; --est-button-surface: var(--est-blue); --est-button-border: var(--est-blue);
}
.est-student button.est-student-button-primary { --est-button-ink: #fff; --est-button-surface: var(--est-blue); }
.est-student button.est-student-button-primary:is(:hover, :active):not(:disabled) { --est-button-surface: #194a8e; --est-button-border: #194a8e; }
.est-student button:disabled { --est-button-ink: var(--est-muted); --est-button-surface: #e9eef5; --est-button-border: #cbd5e2; cursor: default; }
.est-student :focus-visible, .est-student h2:focus { outline: 3px solid var(--est-blue); outline-offset: 3px; }
.est-student :is(button, input, label, h2, a) { scroll-margin-block: 12rem; }
.est-student a { color: var(--est-blue); text-decoration: underline; text-underline-offset: .2em; }
.est-student a:hover { color: #194a8e; }
.est-student [data-est-status] { color: var(--est-muted); font-size: .9rem; }
.est-student [data-est-warning] { padding: .8rem 1rem; color: var(--est-amber); background: var(--est-amber-soft); border-left: 3px solid var(--est-amber); border-radius: .5rem; }
.est-student [data-est-retry-save], .est-student [data-est-retry-submission] { margin: .25rem .5rem .75rem 0; }
.est-student-screen-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: .75rem; margin-block: 1.25rem; }
/* White on the approved blue is 3.186:1: keep help text large and bold.
   Own all visual hover properties so the host theme cannot animate/repaint help. */
#est-student-root.est-student button.est-student-help,
#est-student-root.est-student button.est-student-help:is(:hover, :active) {
    --est-button-ink: #fff; --est-button-surface: #1194F6; --est-button-border: #1194F6;
    margin-block: .5rem; font-size: 19px !important; font-weight: 700 !important;
    color: #fff !important; background: #1194F6 !important; border: 1px solid #1194F6 !important;
    box-shadow: none !important; transform: none !important; transition: none !important;
}
#est-student-root.est-student button.est-student-help:focus-visible { outline: 3px solid var(--est-blue) !important; outline-offset: 3px !important; }
.est-student-intro { max-width: 40rem; color: var(--est-muted); }
.est-student-coverage-card, .est-student-pending-card, .est-student-card, .est-student-result-summary, .est-student-recommendation-card {
    padding: clamp(1rem, 3vw, 1.5rem); background: #fff; border: 1px solid var(--est-line); border-radius: 1rem;
    box-shadow: 0 4px 18px rgb(32 50 74 / 4%); margin-block: 1rem;
}
.est-student-coverage-count { color: var(--est-blue); font-size: 1.25rem; font-weight: 700; }
.est-student progress { display: block; width: 100%; height: .65rem; border: none; border-radius: 1rem; overflow: hidden; background: #e4edf9; accent-color: var(--est-blue); }
.est-student progress::-webkit-progress-bar { background: #e4edf9; border-radius: 1rem; }
.est-student progress::-webkit-progress-value { background: var(--est-blue); border-radius: 1rem; }
.est-student progress::-moz-progress-bar { background: var(--est-blue); border-radius: 1rem; }
.est-student-achievement { padding: .65rem .8rem; background: var(--est-blue-soft); border-radius: .5rem; color: var(--est-blue); font-size: .9rem; }
.est-student-metrics { margin-block: 1.25rem; }
.est-student-metric-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .75rem; margin-bottom: .75rem; }
.est-student p.est-student-metric { margin: 0; padding: 1rem; border: 1px solid var(--est-line); border-radius: .75rem; background: #fff; }
.est-student-coverage-card, .est-student p.est-student-metric, .est-student-result-summary, .est-student-recommendation-card { border-top: 3px solid var(--est-accent); }
.est-student-metric-label { display: block; color: var(--est-muted); font-size: .85rem; }
.est-student-metric strong { font-size: 1.8rem; line-height: 1.5; }
.est-student-actions { display: flex; flex-wrap: wrap; gap: .6rem; margin-block: 1.25rem; }
.est-student-pending-card { border-left: 4px solid var(--est-blue); }
.est-student-pending-card button { margin: .25rem .5rem .25rem 0; }
.est-student-numbers {
    display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: .5rem; position: sticky; top: 0;
    z-index: 1; padding: .65rem; border: 1px solid var(--est-line); border-radius: .85rem; background: var(--est-surface);
}
.est-student-numbers button { --est-button-ink: var(--est-muted); --est-button-surface: #fff; --est-button-border: #a7bad4; display: block; position: relative; padding: .55rem .2rem; background: #fff; border: 1px solid #a7bad4; color: var(--est-muted); }
.est-student-numbers [data-answer-state="answered"] { --est-button-ink: var(--est-blue); --est-button-surface: var(--est-blue-soft); --est-button-border: #7fa8dc; background: var(--est-blue-soft); border-color: #7fa8dc; color: var(--est-blue); }
.est-student-numbers [data-marked="true"] { --est-button-ink: var(--est-amber); --est-button-surface: var(--est-amber-soft); --est-button-border: var(--est-amber); background: var(--est-amber-soft); border-color: var(--est-amber); color: var(--est-amber); }
.est-student-numbers [aria-current] { --est-button-shadow: 0 0 0 2px #c5d9f5; --est-button-border: var(--est-blue); border: 2px solid var(--est-blue); box-shadow: 0 0 0 2px #c5d9f5; font-weight: 800; }
.est-student-answer-indicator { margin-left: .25rem; font-size: .85em; }
.est-student-mark-indicator { position: absolute; top: -.35rem; right: -.2rem; min-width: 1.3rem; border: 1px solid var(--est-amber); border-radius: .35rem; background: var(--est-amber-soft); color: var(--est-amber); font-size: .8rem; line-height: 1.4; }
.est-student-number-status { display: block; font-size: .75rem; font-weight: 500; line-height: 1.6; white-space: nowrap; word-break: normal; overflow-wrap: normal; }
.est-student p.est-student-legend { display: flex; flex-wrap: wrap; gap: .4rem 1rem; margin: .85rem .2rem; color: var(--est-muted); font-size: .8rem; }
.est-student-legend > span { white-space: nowrap; }
.est-student h2.est-student-question-heading { margin: 0 0 .85rem; font-size: .85rem; letter-spacing: .08em; color: var(--est-muted); }
.est-student-question-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: .85rem; }
.est-student .est-student-question-header h2 { margin: 0; }
.est-student-question-navigation { display: flex; gap: .6rem; flex: 0 0 auto; }
.est-student-prompt { margin-bottom: 1.5rem; font-size: clamp(1.4rem, 3vw, 1.85rem); line-height: 1.4; font-weight: 650; color: var(--est-ink); }
.est-student fieldset { min-inline-size: 0; padding: 0; margin: 0 0 .75rem; border: none; }
.est-student legend { margin-bottom: .5rem; padding: 0; font-weight: 700; font-size: .95rem; }
.est-student-option { display: flex; align-items: flex-start; gap: .25rem; margin-block: .75rem; border: 2px solid var(--est-line); border-radius: .8rem; background: #fff; }
.est-student-option:hover { border-color: #7fa8dc; }
.est-student-option:has(input:checked) { background: var(--est-blue-soft); border-color: var(--est-blue); }
.est-student-option input { flex: 0 0 auto; width: 22px; height: 22px; margin: 1.1rem .2rem 1rem .9rem; accent-color: var(--est-blue); }
.est-student-option label { flex: 1; min-width: 0; min-height: 52px; padding: .8rem .8rem .8rem .4rem; cursor: pointer; }
.est-student-option:has(input:disabled) label { cursor: default; }
.est-student-content { max-width: 100%; overflow-x: auto; }
.est-student-content img { display: block; max-width: 100%; height: auto; margin-block: .5rem; border-radius: .5rem; }
.est-student-content p { margin-block: .5rem; }
.est-student-prompt .est-student-content > :first-child { margin-top: 0; }
.est-student-prompt .est-student-content > :last-child { margin-bottom: 0; }
.est-student-formula { max-width: 100%; overflow-wrap: anywhere; }
.est-student-steps, .est-student-finish { display: flex; flex-wrap: wrap; align-items: center; gap: .65rem; padding: .85rem; background: #fff; border: 1px solid var(--est-line); border-radius: .75rem; margin-block: 1rem; }
.est-student-finish p { margin: 0; color: var(--est-muted); font-size: .9rem; }
.est-student-result-summary { display: grid; grid-template-columns: 1.2fr 1fr; gap: .25rem 1rem; align-items: center; }
.est-student-score span { display: block; color: var(--est-muted); font-size: .9rem; }
.est-student-score strong { display: block; color: var(--est-blue); font-size: clamp(2.8rem, 8vw, 4rem); line-height: 1.15; letter-spacing: -.04em; }
.est-student-percentage { color: var(--est-blue); font-weight: 700; font-size: 1.05rem; }
.est-student-result-summary progress, .est-student-result-totals { grid-column: 1 / -1; }
.est-student-result-totals { display: flex; flex-wrap: wrap; gap: .6rem; }
.est-student-result-totals p { padding: .5rem 1rem; border-radius: .6rem; font-weight: 700; }
.est-student [data-result="correct"] { --est-button-ink: var(--est-green); --est-button-surface: var(--est-green-soft); --est-button-border: var(--est-green); color: var(--est-green); background: var(--est-green-soft); border-color: var(--est-green); }
.est-student [data-result="incorrect"] { --est-button-ink: var(--est-red); --est-button-surface: var(--est-red-soft); --est-button-border: var(--est-red); color: var(--est-red); background: var(--est-red-soft); border-color: var(--est-red); }
.est-student-recommendations { margin-block: 2rem 1rem; }
.est-student-recommendation-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .85rem; }
.est-student-recommendation-card { margin: 0; }
.est-student-theory-link { display: inline-block; padding-block: .6rem; min-height: 44px; font-size: .95rem; font-weight: 650; }
.est-student-theory-absent { color: var(--est-muted); font-size: .9rem; }
.est-student-review-outcome { display: inline-block; padding: .4rem .75rem; border: 1px solid; border-radius: .5rem; font-weight: 700; }
.est-student-review-options { padding-left: 1.5rem; }
.est-student .est-student-review-option { padding: 0; margin-block: .85rem; border: 2px solid var(--est-line); border-radius: .8rem; color: var(--est-ink); background: #fff; }
.est-student .est-student-review-option[data-result="correct"] { border-color: var(--est-green); }
.est-student .est-student-review-option[data-result="incorrect"] { border-color: var(--est-red); }
.est-student-review-labels { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; padding: 1rem 1rem 0; }
.est-student-review-choice, .est-student-review-status { display: inline-flex; align-items: center; padding: .25rem .55rem; border-radius: .35rem; font-size: .8rem; line-height: 1.5; font-weight: 700; }
.est-student-review-choice { color: var(--est-blue); background: var(--est-blue-soft); }
.est-student-review-answer { padding: 1rem; }
.est-student-review-option[data-selected="true"] .est-student-review-answer,
.est-student-review-option[data-result="correct"] .est-student-review-answer { font-weight: 700; }
.est-student-review-option .est-student-content > :first-child { margin-top: 0; }
.est-student-review-option .est-student-content > :last-child { margin-bottom: 0; }
.est-student-explanation { margin-top: 1rem; padding-top: .75rem; border-top: 1px solid currentColor; font-size: .95rem; }
.est-student-explanation h3 { font-size: .95rem; color: inherit; }
.est-student-review-option .est-student-explanation { margin-top: 0; padding: 1rem; border-color: var(--est-line); border-radius: 0 0 calc(.8rem - 2px) calc(.8rem - 2px); color: var(--est-ink); background: var(--est-surface); font-weight: 400; }
.est-student-review-option[data-result="incorrect"] .est-student-explanation { background: var(--est-red-soft); }
.est-student-review-option[data-result="correct"] .est-student-explanation { background: var(--est-green-soft); }
.est-student-review-option .est-student-explanation h3 { margin: 0 0 .5rem; color: var(--est-muted); font-size: .8rem; line-height: 1.5; letter-spacing: .04em; text-transform: uppercase; }
.est-student-backdrop { position: fixed; z-index: 100; inset: 0; display: flex; align-items: center; justify-content: center; padding: 1rem; background: rgb(32 50 74 / 55%); }
.est-student-dialog, .est-student dialog { width: 100%; max-width: 40rem; max-height: calc(100dvh - 2rem); padding: 1.5rem; overflow: auto; border: 1px solid var(--est-line); border-radius: 1rem; color: var(--est-ink); background: #fff; box-shadow: 0 20px 80px rgb(32 50 74 / 20%); }
.est-student dialog { width: calc(100% - 2rem); }
.est-student dialog::backdrop { background: rgb(32 50 74 / 55%); }
.est-student-dialog button, .est-student dialog button { margin: .35rem; }
@media (min-width: 800px) {
    .est-student-numbers { grid-template-columns: repeat(10, minmax(0, 1fr)); gap: .4rem; }
    .est-student-number-status { font-size: .68rem; }
}
@media (max-width: 600px) {
    .est-student:has(> div > .est-student-finish) { padding-bottom: calc(16rem + env(safe-area-inset-bottom, 0px)); }
    .est-student#est-student-root { padding: .75rem; border-radius: .8rem; }
    .est-student-screen-header { margin-block: 1rem; }
    .est-student-numbers { gap: .35rem; padding: .5rem; }
    .est-student-numbers button { min-height: 48px; font-size: .85rem; padding: .5rem .15rem; }
    .est-student-number-status { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
    .est-student-finish { position: fixed; z-index: 2; inset-inline: 0; bottom: 0; margin: 0; max-height: 45dvh; overflow-y: auto; padding: .75rem .75rem calc(.75rem + env(safe-area-inset-bottom, 0px)); border-radius: .75rem .75rem 0 0; box-shadow: 0 -4px 20px rgb(32 50 74 / 8%); }
    .est-student-card { padding: 1rem; }
    .est-student-question-header { flex-direction: column; align-items: stretch; gap: .65rem; }
    .est-student-question-navigation button { flex: 1 1 0; padding-inline: .6rem; }
    .est-student-metric-grid, .est-student-recommendation-grid { grid-template-columns: 1fr; }
    .est-student p.est-student-metric { display: flex; justify-content: space-between; gap: .5rem; align-items: center; padding: .75rem 1rem; }
    .est-student-metric strong { font-size: 1.5rem; }
    .est-student-review-labels { padding: .75rem .75rem 0; }
    .est-student-review-answer, .est-student-review-option .est-student-explanation { padding: .75rem; }
    .est-student-steps button { flex: 1 1 auto; }
    .est-student-backdrop { padding: .5rem; }
    .est-student-dialog { padding: 1rem; max-height: calc(100dvh - 1rem); }
}
@media (prefers-reduced-motion: reduce) { .est-student *, .est-student *::before, .est-student *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }

/* Practice shares the established controls; action order stays readable on mobile. */
#est-student-root .est-student-failure-summary { margin-block: 1.25rem; }
#est-student-root .est-student-failures > button { margin: .35rem .5rem .35rem 0; }
#est-student-root .est-student-failures > p { overflow-wrap: anywhere; }
@media (max-width: 480px) {
    #est-student-root .est-student-failures > button { display: block; width: 100%; margin-inline: 0; }
}