:root {
    --navy-950: #050d14;
    --navy-900: #07131d;
    --navy-850: #0a1b27;
    --navy-800: #0e2634;
    --navy-700: #173646;
    --gold-500: #d9bb55;
    --gold-400: #ead372;
    --gold-300: #f1df96;
    --olive-700: #38422a;
    --olive-600: #4b5935;
    --green-500: #27a66c;
    --green-300: #79d7aa;
    --red-500: #d6574f;
    --red-300: #ef9c96;
    --amber-400: #e7a944;
    --ink-100: #f5f1e8;
    --ink-200: #d8dde0;
    --ink-300: #9dacb5;
    --border: rgba(217, 187, 85, 0.32);
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --content: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    color: var(--ink-100);
    background:
        linear-gradient(118deg, transparent 0 69%, rgba(161, 150, 76, 0.08) 69% 73%, transparent 73%),
        linear-gradient(118deg, transparent 0 78%, rgba(161, 150, 76, 0.11) 78% 84%, transparent 84%),
        radial-gradient(circle at 72% 12%, rgba(43, 83, 63, 0.23), transparent 25rem),
        var(--navy-950);
    font-family: "Segoe UI", Arial, sans-serif;
    line-height: 1.5;
}

body::before {
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image: radial-gradient(rgba(217, 187, 85, 0.18) 1px, transparent 1px);
    background-size: 28px 28px;
    opacity: 0.12;
    content: "";
    pointer-events: none;
}

a {
    color: inherit;
}

button,
input {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible {
    outline: 3px solid var(--gold-300);
    outline-offset: 4px;
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 100;
    padding: 10px 14px;
    color: var(--navy-950);
    background: var(--gold-400);
    border-radius: 8px;
    transform: translateY(-150%);
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(calc(100% - 40px), var(--content));
    min-height: 88px;
    margin: 0 auto;
    border-bottom: 1px solid var(--border);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
}

.brand img,
.command-logo {
    width: 58px;
    height: 58px;
    object-fit: contain;
}

.brand span {
    display: grid;
    gap: 1px;
}

.brand strong {
    font-size: 0.85rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.brand small {
    color: var(--ink-300);
    font-size: 0.72rem;
}

.mission-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(calc(100% - 40px), var(--content));
    margin: 14px auto 0;
    padding: 10px 12px;
    color: var(--ink-200);
    background: rgba(8, 25, 36, 0.86);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 12px;
    backdrop-filter: blur(12px);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 8px;
    font-size: 0.84rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-decoration: none;
    text-transform: uppercase;
}

.nav-link:hover,
.nav-link.is-active {
    color: var(--gold-300);
    background: rgba(217, 187, 85, 0.09);
}

.nav-progress {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.82rem;
    font-weight: 700;
}

progress {
    overflow: hidden;
    width: 180px;
    height: 7px;
    appearance: none;
    background: rgba(255, 255, 255, 0.1);
    border: 0;
    border-radius: 999px;
}

progress::-webkit-progress-bar {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 999px;
}

progress::-webkit-progress-value {
    background: linear-gradient(90deg, var(--gold-500), var(--gold-300));
    border-radius: 999px;
}

progress::-moz-progress-bar {
    background: linear-gradient(90deg, var(--gold-500), var(--gold-300));
    border-radius: 999px;
}

.main-shell {
    width: min(calc(100% - 40px), var(--content));
    margin: 0 auto;
}

.flash-message {
    margin: 24px 0 0;
    padding: 14px 18px;
    color: var(--gold-300);
    background: rgba(217, 187, 85, 0.09);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.alert-stack {
    position: fixed;
    top: 102px;
    right: max(18px, calc((100vw - var(--content)) / 2));
    z-index: 80;
    display: grid;
    gap: 12px;
    width: min(470px, calc(100vw - 36px));
    pointer-events: none;
}

.app-alert {
    display: grid;
    align-items: center;
    grid-template-columns: 42px 1fr auto 36px;
    gap: 12px;
    padding: 15px 14px;
    color: var(--ink-100);
    background: rgba(8, 25, 36, 0.97);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-left: 4px solid #5ca6d9;
    border-radius: 13px;
    box-shadow: 0 20px 55px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(16px);
    pointer-events: auto;
    animation: alert-enter 280ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.app-alert.is-closing {
    animation: alert-leave 220ms ease both;
}

.app-alert-error {
    border-left-color: var(--red-500);
}

.app-alert-warning {
    border-left-color: var(--amber-400);
}

.app-alert-success {
    border-left-color: var(--green-500);
}

.app-alert-icon {
    display: grid;
    width: 38px;
    height: 38px;
    color: #dceeff;
    background: rgba(92, 166, 217, 0.14);
    border: 1px solid rgba(92, 166, 217, 0.35);
    border-radius: 50%;
    font-weight: 900;
    place-items: center;
}

.app-alert-error .app-alert-icon {
    color: #ffe0dc;
    background: rgba(214, 87, 79, 0.14);
    border-color: rgba(214, 87, 79, 0.38);
}

.app-alert-warning .app-alert-icon {
    color: #ffebbb;
    background: rgba(231, 169, 68, 0.14);
    border-color: rgba(231, 169, 68, 0.38);
}

.app-alert-success .app-alert-icon {
    color: #dffcef;
    background: rgba(39, 166, 108, 0.14);
    border-color: rgba(39, 166, 108, 0.38);
}

.app-alert-copy strong {
    display: block;
    font-size: 0.9rem;
}

.app-alert-copy p {
    margin: 3px 0 0;
    color: var(--ink-200);
    font-size: 0.83rem;
    line-height: 1.45;
}

.app-alert-action {
    color: var(--gold-300);
    font-size: 0.72rem;
    font-weight: 800;
    text-decoration: none;
    text-transform: uppercase;
}

.app-alert-action:hover {
    text-decoration: underline;
}

.app-alert-close {
    display: grid;
    width: 32px;
    height: 32px;
    padding: 0;
    color: var(--ink-200);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.25rem;
    line-height: 1;
    place-items: center;
}

.app-alert-close:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

@keyframes alert-enter {
    from {
        opacity: 0;
        transform: translate3d(28px, -8px, 0) scale(0.97);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0) scale(1);
    }
}

@keyframes alert-leave {
    to {
        opacity: 0;
        transform: translate3d(30px, 0, 0) scale(0.96);
    }
}

.eyebrow {
    display: inline-block;
    color: var(--gold-400);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.17em;
    text-transform: uppercase;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1,
h2,
h3 {
    line-height: 1.08;
}

.button {
    display: inline-flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 0 22px;
    border: 1px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 800;
    letter-spacing: 0.045em;
    text-decoration: none;
    text-transform: uppercase;
    transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover {
    transform: translateY(-2px);
}

.button-primary {
    color: #182116;
    background: linear-gradient(135deg, var(--gold-300), var(--gold-500));
    box-shadow: 0 12px 28px rgba(217, 187, 85, 0.16);
}

.button-primary:hover {
    background: linear-gradient(135deg, #fff1a7, var(--gold-400));
}

.button-ghost {
    color: var(--ink-100);
    background: rgba(255, 255, 255, 0.035);
    border-color: rgba(255, 255, 255, 0.14);
}

.button-ghost:hover {
    border-color: var(--border);
    background: rgba(217, 187, 85, 0.07);
}

.button-large {
    min-height: 56px;
    padding-inline: 28px;
}

.hero {
    position: relative;
    display: grid;
    min-height: 620px;
    align-items: center;
    grid-template-columns: 1.12fr 0.88fr;
    gap: 52px;
    padding: 60px 0 70px;
}

.hero::after {
    position: absolute;
    right: 38%;
    bottom: 0;
    left: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--gold-500), transparent);
    content: "";
}

.hero h1 {
    max-width: 730px;
    margin: 18px 0 22px;
    font-size: clamp(3rem, 7vw, 5.8rem);
    letter-spacing: -0.055em;
    text-transform: uppercase;
}

.hero h1 span {
    color: var(--gold-500);
}

.hero-lead {
    max-width: 650px;
    margin-bottom: 30px;
    color: var(--ink-200);
    font-size: clamp(1.05rem, 2vw, 1.28rem);
}

.hero-actions,
.menu-actions,
.feedback-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}

.hero-actions form,
.menu-actions form,
.feedback-actions form {
    margin: 0;
}

.feature-list {
    display: flex;
    gap: 0;
    margin: 38px 0 0;
    padding: 0;
    list-style: none;
}

.feature-list li {
    display: grid;
    min-width: 135px;
    padding: 0 24px;
    border-left: 1px solid var(--border);
}

.feature-list li:first-child {
    padding-left: 0;
    border-left: 0;
}

.feature-list strong {
    color: var(--gold-300);
    font-size: 1.65rem;
    line-height: 1;
}

.feature-list span {
    margin-top: 6px;
    color: var(--ink-300);
    font-size: 0.78rem;
    text-transform: uppercase;
}

.hero-emblem {
    position: relative;
    display: grid;
    min-height: 390px;
    place-items: center;
    align-content: center;
    text-align: center;
}

.hero-emblem::before,
.hero-emblem::after {
    position: absolute;
    width: 86%;
    height: 86%;
    border: 1px solid rgba(217, 187, 85, 0.22);
    content: "";
    transform: rotate(45deg);
}

.hero-emblem::after {
    width: 66%;
    height: 66%;
    border-color: rgba(217, 187, 85, 0.1);
}

.hero-emblem img {
    position: relative;
    z-index: 1;
    width: min(100%, 500px);
    height: auto;
    filter: drop-shadow(0 20px 28px rgba(0, 0, 0, 0.52));
}

.hero-emblem p,
.hero-emblem span {
    position: relative;
    z-index: 2;
    margin: 14px 0 0;
    text-transform: uppercase;
}

.hero-emblem p {
    color: var(--gold-400);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.2em;
}

.hero-emblem span {
    margin-top: 4px;
    color: var(--ink-300);
    font-size: 0.72rem;
}

.instructions {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 70px;
    padding: 84px 0 94px;
}

.instructions h2,
.section-heading h1,
.mission-heading h1,
.review-heading h2 {
    margin: 12px 0 16px;
    font-size: clamp(2.1rem, 5vw, 3.5rem);
    text-transform: uppercase;
}

.instructions p,
.section-heading p,
.results-copy > p {
    color: var(--ink-300);
}

.steps {
    display: grid;
    gap: 0;
    margin: 0;
    padding: 0;
    list-style: none;
}

.steps li {
    display: grid;
    grid-template-columns: 58px 1fr;
    gap: 16px;
    align-items: center;
    padding: 18px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.steps li:last-child {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.steps span {
    color: var(--gold-400);
    font-size: 0.8rem;
    font-weight: 900;
    letter-spacing: 0.12em;
}

.steps p {
    margin: 0;
    color: var(--ink-200);
}

.section-heading,
.mission-heading,
.review-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 30px;
}

.section-heading {
    padding: 54px 0 30px;
}

.section-heading p,
.review-heading p {
    margin-bottom: 0;
}

.score-preview {
    display: grid;
    min-width: 190px;
    justify-items: end;
    padding: 14px 0 14px 28px;
    border-left: 1px solid var(--border);
}

.score-preview strong {
    color: var(--gold-300);
    font-size: 3rem;
    line-height: 1;
}

.score-preview span {
    color: var(--ink-300);
    font-size: 0.8rem;
    text-transform: uppercase;
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.mission-card {
    position: relative;
    display: grid;
    min-height: 104px;
    align-items: center;
    grid-template-columns: 68px 1fr auto 26px;
    gap: 18px;
    padding: 16px 20px;
    overflow: hidden;
    background: linear-gradient(115deg, rgba(14, 38, 52, 0.98), rgba(7, 19, 29, 0.92));
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.mission-card::before {
    position: absolute;
    inset: 0 auto 0 0;
    width: 4px;
    background: var(--gold-500);
    content: "";
}

.mission-card:hover {
    border-color: var(--border);
    background: linear-gradient(115deg, rgba(18, 50, 64, 0.98), rgba(10, 28, 39, 0.96));
    transform: translateY(-2px);
}

.mission-card.status-correct::before {
    background: var(--green-500);
}

.mission-card.status-reviewed::before {
    background: var(--amber-400);
}

.mission-card.status-incorrect::before {
    background: var(--red-500);
}

.mission-number {
    color: var(--gold-300);
    font-size: 1.45rem;
    font-weight: 900;
    letter-spacing: 0.08em;
}

.mission-copy {
    display: grid;
}

.mission-copy small {
    color: var(--ink-300);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.mission-copy strong {
    margin-top: 4px;
    font-size: 1rem;
    text-transform: uppercase;
}

.mission-status {
    padding: 5px 9px;
    color: var(--ink-300);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.status-correct .mission-status {
    color: var(--green-300);
    border-color: rgba(39, 166, 108, 0.35);
}

.status-reviewed .mission-status {
    color: #ffd485;
    border-color: rgba(231, 169, 68, 0.35);
}

.status-incorrect .mission-status {
    color: var(--red-300);
    border-color: rgba(214, 87, 79, 0.35);
}

.mission-arrow {
    color: var(--gold-400);
    font-size: 1.25rem;
}

.menu-actions {
    justify-content: space-between;
    padding: 28px 0 70px;
}

.mission-heading {
    padding: 52px 0 26px;
}

.mission-heading h1 {
    margin-bottom: 0;
    font-size: clamp(2rem, 4vw, 3.1rem);
}

.mission-counter {
    color: var(--gold-300);
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1;
}

.mission-counter small {
    color: var(--ink-300);
    font-size: 1rem;
}

.question-panel,
.feedback-panel {
    position: relative;
    margin-bottom: 80px;
    padding: clamp(24px, 5vw, 56px);
    overflow: hidden;
    background: linear-gradient(120deg, rgba(10, 30, 42, 0.98), rgba(6, 17, 26, 0.95));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.question-panel::after,
.feedback-panel::after {
    position: absolute;
    top: -100px;
    right: -130px;
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, transparent 38%, rgba(180, 159, 75, 0.08) 38% 50%, transparent 50% 61%, rgba(180, 159, 75, 0.06) 61% 72%, transparent 72%);
    content: "";
    pointer-events: none;
    transform: rotate(9deg);
}

.question-kicker {
    color: var(--ink-300);
    font-size: 0.77rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.question-panel h2 {
    position: relative;
    z-index: 1;
    max-width: 920px;
    margin: 16px 0 34px;
    font-size: clamp(1.65rem, 3.6vw, 2.7rem);
}

.answer-form,
.answer-form fieldset {
    margin: 0;
}

.answer-form fieldset {
    display: grid;
    gap: 12px;
    padding: 0;
    border: 0;
}

.answer-option {
    position: relative;
    z-index: 1;
    display: grid;
    min-height: 74px;
    align-items: center;
    grid-template-columns: 46px 1fr 20px;
    gap: 15px;
    width: 100%;
    padding: 12px 18px;
    color: var(--ink-100);
    text-align: left;
    background: rgba(20, 54, 69, 0.62);
    border: 1px solid rgba(255, 255, 255, 0.11);
    border-radius: 11px;
    cursor: pointer;
    transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.answer-option:hover {
    background: rgba(35, 72, 84, 0.76);
    border-color: var(--border);
    transform: translateX(5px);
}

.answer-option:disabled {
    cursor: wait;
    opacity: 0.65;
}

.answer-letter {
    display: grid;
    width: 36px;
    height: 36px;
    color: #172116;
    background: linear-gradient(135deg, var(--gold-300), var(--gold-500));
    border-radius: 50%;
    font-weight: 900;
    place-items: center;
}

.answer-chevron {
    color: var(--gold-400);
    font-size: 1.6rem;
}

.keyboard-hint {
    margin: 18px 0 0;
    color: var(--ink-300);
    font-size: 0.76rem;
}

.feedback-panel {
    border-color: rgba(39, 166, 108, 0.45);
}

.feedback-panel.feedback-incorrect {
    border-color: rgba(214, 87, 79, 0.48);
}

.feedback-status {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 28px;
}

.feedback-icon {
    display: grid;
    width: 68px;
    height: 68px;
    color: #dffcef;
    background: rgba(39, 166, 108, 0.2);
    border: 1px solid rgba(39, 166, 108, 0.55);
    border-radius: 14px;
    font-size: 2.2rem;
    font-weight: 400;
    place-items: center;
}

.feedback-incorrect .feedback-icon {
    color: #ffe2df;
    background: rgba(214, 87, 79, 0.18);
    border-color: rgba(214, 87, 79, 0.55);
}

.feedback-status small {
    color: var(--ink-300);
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.feedback-status h2 {
    margin: 4px 0 0;
    color: var(--green-300);
    font-size: clamp(1.7rem, 4vw, 2.8rem);
    text-transform: uppercase;
}

.feedback-incorrect .feedback-status h2 {
    color: var(--red-300);
}

.selected-answer,
.correct-answer,
.explanation {
    position: relative;
    z-index: 1;
    margin-top: 14px;
    padding: 18px 20px;
    background: rgba(255, 255, 255, 0.035);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
}

.selected-answer span,
.correct-answer span,
.explanation h3 {
    display: block;
    margin: 0 0 7px;
    color: var(--gold-400);
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.selected-answer p,
.correct-answer p,
.explanation p {
    margin: 0;
    color: var(--ink-200);
}

.explanation {
    padding: 23px;
    border-color: var(--border);
}

.explanation p {
    font-size: 1.03rem;
    line-height: 1.7;
}

.key-idea {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 16px;
    margin-top: 18px;
    padding: 15px 18px;
    color: var(--ink-200);
    background: rgba(95, 111, 53, 0.22);
    border-left: 3px solid var(--gold-500);
}

.key-idea strong {
    color: var(--gold-300);
    font-size: 0.72rem;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.feedback-actions {
    position: relative;
    z-index: 1;
    justify-content: flex-end;
    margin-top: 28px;
}

body.has-active-dialog {
    overflow: hidden;
}

.response-alert {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: grid;
    padding: 22px;
    place-items: center;
}

.response-alert.is-closing {
    pointer-events: none;
}

.response-alert-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(1, 8, 13, 0.78);
    backdrop-filter: blur(9px);
    animation: response-backdrop-enter 240ms ease both;
}

.response-alert-card {
    position: relative;
    z-index: 1;
    width: min(720px, 100%);
    max-height: calc(100vh - 44px);
    padding: clamp(24px, 5vw, 46px);
    overflow-y: auto;
    color: var(--ink-100);
    background:
        linear-gradient(128deg, rgba(39, 166, 108, 0.14), transparent 38%),
        linear-gradient(145deg, #0b2430, #07131d 68%);
    border: 1px solid rgba(39, 166, 108, 0.55);
    border-top: 5px solid var(--green-500);
    border-radius: 22px;
    box-shadow: 0 32px 100px rgba(0, 0, 0, 0.66);
    animation: response-card-enter 320ms cubic-bezier(0.2, 0.85, 0.2, 1) both;
}

.response-alert-incorrect .response-alert-card {
    background:
        linear-gradient(128deg, rgba(214, 87, 79, 0.14), transparent 38%),
        linear-gradient(145deg, #27191c, #07131d 68%);
    border-color: rgba(214, 87, 79, 0.58);
    border-top-color: var(--red-500);
}

.response-alert.is-closing .response-alert-backdrop {
    animation: response-backdrop-leave 220ms ease both;
}

.response-alert.is-closing .response-alert-card {
    animation: response-card-leave 220ms ease both;
}

.response-alert-card:focus {
    outline: none;
}

.response-alert-close {
    position: absolute;
    top: 16px;
    right: 16px;
    display: grid;
    width: 38px;
    height: 38px;
    color: var(--ink-200);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.13);
    border-radius: 9px;
    font-size: 1.45rem;
    line-height: 1;
    text-decoration: none;
    place-items: center;
}

.response-alert-close:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.12);
}

.response-alert-icon {
    display: grid;
    width: 74px;
    height: 74px;
    margin-bottom: 20px;
    color: #e2fff0;
    background: rgba(39, 166, 108, 0.18);
    border: 1px solid rgba(39, 166, 108, 0.6);
    border-radius: 18px;
    font-size: 2.5rem;
    place-items: center;
}

.response-alert-incorrect .response-alert-icon {
    color: #ffe4e1;
    background: rgba(214, 87, 79, 0.17);
    border-color: rgba(214, 87, 79, 0.62);
}

.response-alert-eyebrow {
    color: var(--gold-400);
    font-size: 0.73rem;
    font-weight: 900;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.response-alert-card h2 {
    margin: 8px 44px 14px 0;
    color: var(--green-300);
    font-size: clamp(2rem, 5vw, 3.4rem);
    text-transform: uppercase;
}

.response-alert-incorrect .response-alert-card h2 {
    color: var(--red-300);
}

.response-alert-selection {
    margin-bottom: 13px;
    padding: 13px 15px;
    color: var(--ink-100);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

.response-alert-message {
    margin-bottom: 15px;
    color: var(--ink-200);
    font-size: 1rem;
    line-height: 1.65;
}

.response-alert-key {
    padding: 13px 15px;
    color: var(--ink-200);
    background: rgba(217, 187, 85, 0.08);
    border-left: 3px solid var(--gold-500);
    font-size: 0.88rem;
}

.response-alert-key strong {
    color: var(--gold-300);
}

.response-alert-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 26px;
}

@keyframes response-backdrop-enter {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes response-backdrop-leave {
    to { opacity: 0; }
}

@keyframes response-card-enter {
    from {
        opacity: 0;
        transform: translate3d(0, 26px, 0) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0) scale(1);
    }
}

@keyframes response-card-leave {
    to {
        opacity: 0;
        transform: translate3d(0, 18px, 0) scale(0.97);
    }
}

.results-hero {
    display: grid;
    align-items: center;
    grid-template-columns: 1fr 360px;
    gap: 60px;
    padding: 64px 0 54px;
    border-bottom: 1px solid var(--border);
}

.results-hero h1 {
    margin: 12px 0 15px;
    font-size: clamp(2.7rem, 7vw, 5.2rem);
    letter-spacing: -0.045em;
    text-transform: uppercase;
}

.grade-badge {
    display: inline-flex;
    margin: 12px 0 10px;
    padding: 8px 12px;
    color: #dffcef;
    background: rgba(39, 166, 108, 0.18);
    border: 1px solid rgba(39, 166, 108, 0.4);
    border-radius: 7px;
    font-size: 0.8rem;
    font-weight: 900;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.grade-satisfactory .grade-badge {
    color: #ffe5a7;
    background: rgba(231, 169, 68, 0.16);
    border-color: rgba(231, 169, 68, 0.4);
}

.grade-reinforce .grade-badge {
    color: #ffd8d4;
    background: rgba(214, 87, 79, 0.16);
    border-color: rgba(214, 87, 79, 0.4);
}

.grade-message {
    margin-bottom: 0;
}

.score-card {
    display: grid;
    min-height: 300px;
    align-content: center;
    padding: 36px;
    background: linear-gradient(145deg, rgba(27, 58, 54, 0.62), rgba(8, 24, 34, 0.94));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.score-card > span {
    color: var(--ink-300);
    font-size: 0.77rem;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.score-card strong {
    margin: 4px 0 6px;
    color: var(--gold-300);
    font-size: 4.6rem;
    line-height: 1;
}

.score-card strong small {
    color: var(--ink-300);
    font-size: 1.1rem;
}

.score-card p {
    color: var(--ink-200);
}

.score-card progress {
    width: 100%;
}

.review-section {
    padding: 60px 0 34px;
}

.review-heading {
    margin-bottom: 24px;
}

.review-heading h2 {
    margin-bottom: 0;
    font-size: clamp(2rem, 4vw, 3rem);
}

.review-list {
    display: grid;
    gap: 10px;
}

.review-item {
    display: grid;
    grid-template-columns: 72px 1fr;
    gap: 20px;
    padding: 22px 24px;
    background: rgba(11, 31, 43, 0.84);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-left: 4px solid var(--green-500);
    border-radius: 11px;
}

.review-item.review-incorrect {
    border-left-color: var(--red-500);
}

.review-number {
    color: var(--gold-400);
    font-size: 1.45rem;
    font-weight: 900;
}

.review-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.review-title-row h3 {
    margin: 0;
    font-size: 1.06rem;
    text-transform: uppercase;
}

.result-pill {
    flex: 0 0 auto;
    padding: 5px 9px;
    color: var(--green-300);
    background: rgba(39, 166, 108, 0.1);
    border: 1px solid rgba(39, 166, 108, 0.3);
    border-radius: 999px;
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.review-incorrect .result-pill {
    color: var(--red-300);
    background: rgba(214, 87, 79, 0.1);
    border-color: rgba(214, 87, 79, 0.3);
}

.review-question {
    margin: 8px 0 13px;
    color: var(--ink-300);
    font-size: 0.9rem;
}

.review-item dl {
    display: grid;
    gap: 8px;
    margin: 0;
}

.review-item dl div {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 12px;
}

.review-item dt {
    color: var(--gold-400);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.review-item dd {
    margin: 0;
    color: var(--ink-200);
}

.remember-card {
    display: grid;
    align-items: center;
    grid-template-columns: 220px 1fr auto;
    gap: 36px;
    margin: 26px 0 76px;
    padding: 32px;
    background: linear-gradient(110deg, rgba(27, 58, 54, 0.58), rgba(8, 24, 34, 0.92));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.remember-card img {
    width: 100%;
    height: auto;
}

.remember-card ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px 24px;
    margin: 12px 0 0;
    padding: 0;
    color: var(--ink-200);
    list-style: none;
}

.remember-card li::before {
    margin-right: 9px;
    color: var(--gold-400);
    content: "✓";
}

.site-footer {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    width: min(calc(100% - 40px), var(--content));
    margin: 0 auto;
    padding: 20px 0 30px;
    color: var(--ink-300);
    border-top: 1px solid rgba(255, 255, 255, 0.07);
    font-size: 0.69rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 900px) {
    .hero,
    .instructions,
    .results-hero {
        grid-template-columns: 1fr;
    }

    .hero {
        gap: 12px;
        padding-top: 48px;
    }

    .hero-emblem {
        min-height: 330px;
    }

    .instructions {
        gap: 30px;
    }

    .mission-grid {
        grid-template-columns: 1fr;
    }

    .results-hero {
        gap: 30px;
    }

    .score-card {
        min-height: auto;
    }

    .remember-card {
        grid-template-columns: 170px 1fr;
    }

    .remember-card form {
        grid-column: 1 / -1;
    }
}

@media (max-width: 620px) {
    .site-header,
    .mission-nav,
    .main-shell,
    .site-footer {
        width: min(calc(100% - 24px), var(--content));
    }

    .alert-stack {
        top: 84px;
        right: 12px;
        width: calc(100vw - 24px);
    }

    .app-alert {
        grid-template-columns: 38px 1fr 34px;
        gap: 10px;
    }

    .app-alert-action {
        grid-column: 2;
        justify-self: start;
    }

    .app-alert-close {
        grid-column: 3;
        grid-row: 1;
    }

    .response-alert {
        padding: 10px;
    }

    .response-alert-card {
        max-height: calc(100vh - 20px);
        border-radius: 16px;
    }

    .response-alert-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .response-alert-actions .button {
        width: 100%;
    }

    .site-header {
        min-height: 76px;
    }

    .brand img,
    .command-logo {
        width: 48px;
        height: 48px;
    }

    .brand small {
        display: none;
    }

    .brand strong {
        font-size: 0.72rem;
    }

    .mission-nav {
        gap: 10px;
    }

    .nav-progress progress {
        display: none;
    }

    .hero {
        min-height: auto;
    }

    .hero h1 {
        font-size: clamp(2.6rem, 15vw, 4rem);
    }

    .hero-actions,
    .menu-actions,
    .feedback-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .hero-actions form,
    .menu-actions form,
    .feedback-actions form,
    .hero-actions .button,
    .menu-actions .button,
    .feedback-actions .button,
    .hero-actions form .button,
    .menu-actions form .button,
    .feedback-actions form .button {
        width: 100%;
    }

    .feature-list {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
    }

    .feature-list li {
        min-width: 0;
        padding: 0 10px;
    }

    .feature-list span {
        font-size: 0.64rem;
    }

    .hero-emblem {
        min-height: 250px;
    }

    .section-heading,
    .mission-heading,
    .review-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .score-preview {
        justify-items: start;
        padding: 0;
        border: 0;
    }

    .mission-card {
        grid-template-columns: 48px 1fr 20px;
        gap: 10px;
        padding: 14px;
    }

    .mission-status {
        grid-column: 2;
        justify-self: start;
    }

    .mission-arrow {
        grid-column: 3;
        grid-row: 1 / span 2;
    }

    .mission-counter {
        font-size: 2.6rem;
    }

    .question-panel,
    .feedback-panel {
        margin-bottom: 50px;
        border-radius: var(--radius-md);
    }

    .answer-option {
        grid-template-columns: 42px 1fr;
        padding-inline: 12px;
    }

    .answer-chevron {
        display: none;
    }

    .key-idea {
        grid-template-columns: 1fr;
        gap: 5px;
    }

    .review-item {
        grid-template-columns: 1fr;
    }

    .review-title-row {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }

    .review-item dl div {
        grid-template-columns: 1fr;
        gap: 3px;
    }

    .remember-card {
        grid-template-columns: 1fr;
    }

    .remember-card img {
        width: min(220px, 70%);
        margin: 0 auto;
    }

    .remember-card ul {
        grid-template-columns: 1fr;
    }

    .site-footer {
        flex-direction: column;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}

@media print {
    :root {
        color-scheme: light;
    }

    body {
        color: #101820;
        background: #fff;
    }

    body::before,
    .mission-nav,
    .alert-stack,
    .response-alert,
    .print-button,
    .remember-card form,
    .site-footer {
        display: none !important;
    }

    .site-header {
        border-bottom-color: #aaa;
    }

    .brand strong,
    .results-copy h1,
    .review-title-row h3 {
        color: #101820;
    }

    .brand small,
    .results-copy > p,
    .review-question,
    .review-item dd,
    .remember-card li {
        color: #37434d;
    }

    .results-hero {
        grid-template-columns: 1fr 280px;
        padding: 28px 0;
    }

    .score-card,
    .review-item,
    .remember-card {
        color: #101820;
        background: #fff;
        border-color: #aaa;
        box-shadow: none;
        break-inside: avoid;
    }

    .review-section {
        padding-top: 30px;
    }

    .review-item {
        padding: 14px;
    }
}