.aii-app,
.aii-app * {
    box-sizing: border-box;
}

.aii-app {
    --aii-navy: #102e52;
    --aii-blue: #2670b8;
    --aii-blue-2: #eaf3fb;
    --aii-blue-3: #f6f9fc;
    --aii-text: #24384d;
    --aii-muted: #66798b;
    --aii-border: #cbdbe8;
    --aii-green: #2f7d5d;
    --aii-green-bg: #edf7f1;
    --aii-amber: #9b6d1f;
    --aii-amber-bg: #fff8ea;
    --aii-red: #a64646;
    color: var(--aii-text);
    line-height: 1.55;
    max-width: 1380px;
    margin: 0 auto;
}

.aii-app button,
.aii-app input,
.aii-app select,
.aii-app textarea {
    font: inherit;
}

.aii-shell {
    background: #fff;
    border: 1px solid var(--aii-border);
    border-radius: 16px;
    overflow: hidden;
}

.aii-header {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: flex-start;
    padding: 28px 30px;
    border-bottom: 1px solid var(--aii-border);
    background: #fff;
}

.aii-header h1,
.aii-main h2,
.aii-main h3,
.aii-main h4 {
    color: var(--aii-navy);
    margin-top: 0;
}

.aii-header h1 {
    margin: 4px 0 4px;
    font-size: clamp(1.75rem, 3vw, 2.65rem);
    line-height: 1.1;
}

.aii-header p {
    margin: 0;
    color: var(--aii-muted);
    max-width: 760px;
}

.aii-eyebrow,
.aii-kicker {
    display: block;
    color: var(--aii-blue);
    font-weight: 700;
    font-size: .78rem;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.aii-header-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
}

.aii-chip,
.aii-badge {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 5px 10px;
    border: 1px solid var(--aii-border);
    border-radius: 999px;
    background: var(--aii-blue-3);
    color: var(--aii-navy);
    font-size: .83rem;
    font-weight: 700;
    white-space: nowrap;
}

.aii-badge.is-pass {
    border-color: #b7d7c5;
    background: var(--aii-green-bg);
    color: var(--aii-green);
}

.aii-body {
    display: grid;
    grid-template-columns: 210px minmax(0, 1fr);
    min-height: 720px;
}

.aii-nav {
    padding: 18px 14px;
    border-right: 1px solid var(--aii-border);
    background: var(--aii-blue-3);
}

.aii-nav-btn {
    width: 100%;
    display: grid;
    grid-template-columns: 28px 1fr auto;
    align-items: center;
    gap: 10px;
    border: 0;
    border-radius: 10px;
    padding: 12px 11px;
    margin: 2px 0 6px;
    background: transparent;
    color: var(--aii-navy);
    text-align: left;
    cursor: pointer;
    font-weight: 700;
}

.aii-nav-btn:hover:not(:disabled),
.aii-nav-btn:focus-visible:not(:disabled) {
    background: #fff;
    outline: 2px solid var(--aii-blue);
    outline-offset: 1px;
}

.aii-nav-btn.is-active {
    background: var(--aii-navy);
    color: #fff;
}

.aii-nav-btn:disabled {
    opacity: .48;
    cursor: not-allowed;
}

.aii-nav-icon {
    font-size: 1.08rem;
    text-align: center;
}

.aii-lock {
    font-size: .68rem;
    font-weight: 600;
}

.aii-main {
    min-width: 0;
    padding: 28px;
    outline: none;
    background: #fff;
}

.aii-page-head {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: flex-start;
    margin-bottom: 22px;
}

.aii-page-head h2 {
    margin: 4px 0 6px;
    font-size: clamp(1.5rem, 2.5vw, 2.2rem);
}

.aii-page-head p {
    margin: 0;
    max-width: 820px;
    color: var(--aii-muted);
}

.aii-hero-card {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 22px;
    padding: 24px;
    border: 1px solid var(--aii-border);
    border-radius: 14px;
    background: var(--aii-blue-3);
    margin-bottom: 22px;
}

.aii-hero-card h3 {
    margin: 4px 0 8px;
    font-size: 1.45rem;
}

.aii-hero-card p {
    color: var(--aii-muted);
    max-width: 650px;
}

.aii-model-mini {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px;
}

.aii-model-mini span {
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--aii-border);
    border-radius: 9px;
    background: #fff;
    padding: 8px 10px;
    font-size: .88rem;
    color: var(--aii-navy);
    font-weight: 700;
}

.aii-model-mini b {
    width: 23px;
    height: 23px;
    border-radius: 50%;
    display: inline-grid;
    place-items: center;
    background: var(--aii-blue);
    color: #fff;
    font-size: .72rem;
}

.aii-btn {
    appearance: none;
    border: 1px solid transparent;
    border-radius: 9px;
    min-height: 43px;
    padding: 9px 16px;
    font-weight: 700;
    cursor: pointer;
}

.aii-btn:focus-visible {
    outline: 3px solid rgba(38,112,184,.28);
    outline-offset: 2px;
}

.aii-btn:disabled {
    opacity: .45;
    cursor: not-allowed;
}

.aii-btn-primary {
    background: var(--aii-blue);
    color: #fff;
}

.aii-btn-primary:hover:not(:disabled) {
    background: var(--aii-navy);
}

.aii-btn-secondary {
    background: #fff;
    color: var(--aii-navy);
    border-color: var(--aii-border);
}

.aii-btn-secondary:hover:not(:disabled) {
    border-color: var(--aii-blue);
    color: var(--aii-blue);
}

.aii-stat-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.aii-stat {
    border: 1px solid var(--aii-border);
    border-radius: 12px;
    padding: 16px;
    background: #fff;
}

.aii-stat strong {
    display: block;
    color: var(--aii-navy);
    font-size: 1.45rem;
    line-height: 1.1;
}

.aii-stat span {
    display: block;
    margin-top: 4px;
    font-weight: 700;
}

.aii-stat small {
    display: block;
    color: var(--aii-muted);
    margin-top: 4px;
}

.aii-progress-ring {
    width: 86px;
    height: 86px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    border: 8px solid var(--aii-blue-2);
    outline: 2px solid var(--aii-blue);
    outline-offset: -8px;
    color: var(--aii-navy);
    font-weight: 800;
}

.aii-section {
    margin: 26px 0;
}

.aii-section-head {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: end;
    margin-bottom: 14px;
}

.aii-section-head h3 {
    margin: 3px 0 0;
}

.aii-section-head p {
    margin: 0;
    color: var(--aii-muted);
    max-width: 520px;
}

.aii-outcome-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.aii-outcome-card {
    position: relative;
    border: 1px solid var(--aii-border);
    border-radius: 12px;
    padding: 16px;
    background: #fff;
}

.aii-outcome-card h4 {
    margin: 5px 0 7px;
}

.aii-outcome-card p {
    margin: 0 0 8px;
    color: var(--aii-muted);
    font-size: .9rem;
}

.aii-outcome-card small {
    color: var(--aii-blue);
    font-weight: 700;
}

.aii-outcome-num,
.aii-module-num {
    display: inline-grid;
    place-items: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--aii-blue-2);
    color: var(--aii-blue);
    font-weight: 800;
}

.aii-panel {
    border: 1px solid var(--aii-border);
    border-radius: 14px;
    background: #fff;
    padding: 22px;
    margin-bottom: 18px;
}

.aii-panel-soft {
    background: var(--aii-blue-3);
}

.aii-two-col {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
    gap: 18px;
    align-items: start;
}

.aii-module-layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(320px, .6fr);
}

.aii-panel h3 {
    margin-top: 18px;
    margin-bottom: 8px;
}

.aii-panel > h3:first-child,
.aii-panel > .aii-kicker + h3 {
    margin-top: 0;
}

.aii-panel p {
    color: var(--aii-text);
}

.aii-panel ul,
.aii-panel ol {
    padding-left: 1.25rem;
}

.aii-panel li {
    margin: 5px 0;
}

.aii-principle-list {
    display: grid;
    gap: 9px;
}

.aii-principle-list > div {
    border-left: 3px solid var(--aii-blue);
    background: var(--aii-blue-3);
    padding: 10px 12px;
}

.aii-principle-list strong,
.aii-principle-list span {
    display: block;
}

.aii-principle-list span {
    color: var(--aii-muted);
    margin-top: 2px;
}

.aii-chain {
    columns: 2;
    column-gap: 28px;
}

.aii-success-box,
.aii-warning-box {
    display: grid;
    gap: 3px;
    padding: 13px 14px;
    margin: 14px 0;
    border-radius: 10px;
    border: 1px solid;
}

.aii-success-box {
    border-color: #b7d7c5;
    background: var(--aii-green-bg);
    color: #285f49;
}

.aii-warning-box {
    border-color: #e5d3a7;
    background: var(--aii-amber-bg);
    color: #765215;
}

.aii-success-box span,
.aii-warning-box span {
    color: inherit;
}

.aii-notice {
    border: 1px solid var(--aii-border);
    border-left: 4px solid var(--aii-blue);
    border-radius: 10px;
    padding: 13px 14px;
    background: var(--aii-blue-3);
    margin: 18px 0;
}

.aii-module-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.aii-module-card {
    position: relative;
    appearance: none;
    border: 1px solid var(--aii-border);
    border-radius: 13px;
    padding: 18px;
    min-height: 205px;
    background: #fff;
    text-align: left;
    cursor: pointer;
}

.aii-module-card:hover,
.aii-module-card:focus-visible {
    border-color: var(--aii-blue);
    outline: 2px solid rgba(38,112,184,.18);
}

.aii-module-card h3 {
    margin: 10px 0 6px;
    color: var(--aii-navy);
}

.aii-module-card p {
    color: var(--aii-muted);
}

.aii-module-card small {
    color: var(--aii-blue);
    font-weight: 700;
}

.aii-module-status {
    position: absolute;
    top: 14px;
    right: 14px;
    font-size: .72rem;
    border: 1px solid var(--aii-border);
    border-radius: 999px;
    padding: 3px 8px;
    color: var(--aii-muted);
}

.aii-module-status.is-complete {
    background: var(--aii-green-bg);
    border-color: #b7d7c5;
    color: var(--aii-green);
}

.aii-back {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--aii-blue);
    padding: 0 0 12px;
    cursor: pointer;
    font-weight: 700;
}

.aii-split {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.aii-rule {
    display: grid;
    gap: 4px;
    border: 1px solid var(--aii-border);
    border-left: 4px solid var(--aii-navy);
    padding: 13px 14px;
    background: var(--aii-blue-3);
    margin: 18px 0;
}

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

.aii-step-list > div {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 12px;
    align-items: start;
    padding: 12px;
    border: 1px solid var(--aii-border);
    border-radius: 10px;
}

.aii-step-list > div > span {
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--aii-blue);
    color: #fff;
    font-weight: 800;
}

.aii-step-list strong {
    color: var(--aii-navy);
}

.aii-step-list p {
    margin: 3px 0 0;
    color: var(--aii-muted);
}

.aii-mini-card {
    padding: 12px;
    border: 1px solid var(--aii-border);
    border-radius: 10px;
    background: #fff;
    margin: 9px 0;
}

.aii-mini-card p {
    margin: 4px 0 0;
    color: var(--aii-muted);
}

.aii-details {
    margin-top: 16px;
    border-top: 1px solid var(--aii-border);
    padding-top: 14px;
}

.aii-details summary {
    cursor: pointer;
    color: var(--aii-blue);
    font-weight: 700;
}

.aii-select,
.aii-app textarea {
    width: 100%;
    border: 1px solid var(--aii-border);
    border-radius: 8px;
    background: #fff;
    color: var(--aii-text);
    padding: 9px 10px;
}

.aii-select:focus,
.aii-app textarea:focus {
    outline: 2px solid var(--aii-blue);
    outline-offset: 1px;
}

.aii-page-head > .aii-select {
    width: auto;
    min-width: 240px;
}

.aii-scenario-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-bottom: 12px;
}

.aii-scenario-meta span {
    font-size: .75rem;
    font-weight: 700;
    color: var(--aii-navy);
    background: var(--aii-blue-2);
    border-radius: 999px;
    padding: 4px 8px;
}

.aii-scenario-context {
    font-size: 1.04rem;
    color: var(--aii-text);
}

.aii-evidence-box,
.aii-distractor {
    display: grid;
    gap: 4px;
    border: 1px solid var(--aii-border);
    border-radius: 10px;
    padding: 12px;
    margin: 14px 0;
}

.aii-evidence-box {
    background: var(--aii-blue-3);
}

.aii-distractor {
    background: #fafafa;
    color: var(--aii-muted);
}

.aii-evidence-box strong,
.aii-distractor strong {
    color: var(--aii-navy);
}

.aii-choice-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin: 10px 0 14px;
}

.aii-choice-grid button {
    min-height: 44px;
    border: 1px solid var(--aii-border);
    border-radius: 9px;
    background: #fff;
    color: var(--aii-navy);
    padding: 9px 10px;
    text-align: left;
    cursor: pointer;
    font-weight: 700;
}

.aii-choice-grid button:hover,
.aii-choice-grid button:focus-visible {
    border-color: var(--aii-blue);
    background: var(--aii-blue-3);
    outline: 2px solid rgba(38,112,184,.16);
}

.aii-confidence {
    display: grid;
    grid-template-columns: auto minmax(150px, 220px);
    align-items: center;
    gap: 14px;
    margin-top: 12px;
}

.aii-success-inline {
    padding: 9px 11px;
    border-radius: 9px;
    background: var(--aii-green-bg);
    color: var(--aii-green);
    margin-bottom: 14px;
}

.aii-calibration {
    display: grid;
    gap: 10px;
}

.aii-calibration > div {
    border-bottom: 1px solid var(--aii-border);
    padding-bottom: 9px;
}

.aii-calibration p {
    margin: 3px 0 0;
    color: var(--aii-muted);
}

.aii-filterbar {
    display: flex;
    align-items: end;
    gap: 10px;
    flex-wrap: wrap;
    border: 1px solid var(--aii-border);
    border-radius: 11px;
    padding: 12px;
    margin-bottom: 16px;
    background: var(--aii-blue-3);
}

.aii-filterbar label {
    display: grid;
    gap: 4px;
    min-width: 180px;
    font-size: .79rem;
    font-weight: 700;
    color: var(--aii-navy);
}

.aii-mode-switch {
    display: inline-flex;
    border: 1px solid var(--aii-border);
    border-radius: 9px;
    overflow: hidden;
    background: #fff;
}

.aii-mode-switch button {
    border: 0;
    border-right: 1px solid var(--aii-border);
    background: #fff;
    color: var(--aii-navy);
    padding: 8px 10px;
    cursor: pointer;
    font-weight: 700;
}

.aii-mode-switch button:last-child {
    border-right: 0;
}

.aii-mode-switch button.is-active {
    background: var(--aii-navy);
    color: #fff;
}

.aii-timer {
    margin-left: auto;
    color: var(--aii-navy);
}

.aii-result-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin: 14px 0;
}

.aii-result-grid > div,
.aii-result-detail {
    border: 1px solid var(--aii-border);
    border-radius: 10px;
    padding: 11px;
    background: #fff;
}

.aii-result-grid p,
.aii-result-detail p {
    margin: 4px 0;
    color: var(--aii-muted);
}

.aii-progress-row {
    display: grid;
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 14px;
    align-items: center;
    margin: 10px 0;
}

.aii-progress-row > div {
    display: grid;
}

.aii-progress-row small {
    color: var(--aii-muted);
}

.aii-progress-row > span {
    height: 10px;
    background: #e7edf2;
    border-radius: 999px;
    overflow: hidden;
}

.aii-progress-row i {
    display: block;
    height: 100%;
    background: var(--aii-blue);
    border-radius: 999px;
}

.aii-checklist {
    display: grid;
    gap: 7px;
    margin: 12px 0 16px;
}

.aii-checklist span {
    position: relative;
    padding-left: 25px;
}

.aii-checklist span::before {
    content: "○";
    position: absolute;
    left: 0;
    color: var(--aii-muted);
}

.aii-checklist span.ok::before {
    content: "✓";
    color: var(--aii-green);
    font-weight: 800;
}

.aii-help {
    color: var(--aii-muted);
    font-size: .9rem;
}

.aii-capstone {
    margin-top: 20px;
    border-top: 1px solid var(--aii-border);
    padding-top: 20px;
}

.aii-question {
    border: 1px solid var(--aii-border);
    border-radius: 10px;
    padding: 13px;
    margin: 12px 0;
}

.aii-question legend {
    color: var(--aii-navy);
    font-weight: 700;
    padding: 0 4px;
}

.aii-question label {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 7px 4px;
    cursor: pointer;
}

.aii-question input {
    margin-top: .25em;
}

.aii-label {
    display: grid;
    gap: 6px;
    color: var(--aii-navy);
    font-weight: 700;
    margin: 14px 0;
}

.aii-guide-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.aii-guide-card {
    display: grid;
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
    border: 1px solid var(--aii-border);
    border-radius: 11px;
    padding: 15px;
    background: #fff;
}

.aii-guide-card > span {
    color: var(--aii-blue);
    font-weight: 800;
}

.aii-guide-card h3 {
    margin: 0 0 5px;
    font-size: 1rem;
}

.aii-guide-card p {
    margin: 0;
    color: var(--aii-muted);
}

.aii-reference-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.aii-reference-grid > div {
    border: 1px solid var(--aii-border);
    border-radius: 10px;
    padding: 12px;
    background: var(--aii-blue-3);
}

.aii-reference-grid p {
    margin: 4px 0 0;
    color: var(--aii-muted);
    font-size: .88rem;
}

.aii-loading,
.aii-noscript {
    border: 1px solid #cbdbe8;
    padding: 18px;
    background: #f6f9fc;
    color: #102e52;
}

.aii-toast {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 99999;
    max-width: 340px;
    border: 1px solid var(--aii-border);
    border-radius: 10px;
    padding: 12px;
    background: #fff;
    box-shadow: 0 8px 28px rgba(16,46,82,.15);
}

@media (max-width: 1080px) {
    .aii-body { grid-template-columns: 1fr; }
    .aii-nav {
        border-right: 0;
        border-bottom: 1px solid var(--aii-border);
        display: grid;
        grid-template-columns: repeat(6, minmax(0,1fr));
        gap: 6px;
        padding: 10px;
    }
    .aii-nav-btn {
        grid-template-columns: 1fr;
        justify-items: center;
        text-align: center;
        min-height: 66px;
        padding: 7px 5px;
        font-size: .78rem;
    }
    .aii-lock { display:none; }
    .aii-two-col,
    .aii-module-layout,
    .aii-hero-card { grid-template-columns: 1fr; }
    .aii-outcome-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
    .aii-module-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 760px) {
    .aii-header,
    .aii-page-head,
    .aii-section-head {
        flex-direction: column;
        align-items: stretch;
    }
    .aii-header { padding: 22px 18px; }
    .aii-header-meta { justify-content: flex-start; }
    .aii-main { padding: 18px 14px; }
    .aii-nav {
        grid-template-columns: repeat(3,minmax(0,1fr));
    }
    .aii-stat-grid,
    .aii-outcome-grid,
    .aii-module-grid,
    .aii-guide-grid,
    .aii-reference-grid,
    .aii-result-grid {
        grid-template-columns: 1fr;
    }
    .aii-split,
    .aii-choice-grid {
        grid-template-columns: 1fr;
    }
    .aii-chain { columns: 1; }
    .aii-progress-row {
        grid-template-columns: 1fr;
        gap: 5px;
    }
    .aii-page-head > .aii-select { width: 100%; }
    .aii-confidence { grid-template-columns: 1fr; }
    .aii-mode-switch { width: 100%; }
    .aii-mode-switch button { flex: 1; }
    .aii-filterbar > * { width: 100%; }
    .aii-filterbar label { min-width: 0; }
    .aii-timer { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
    .aii-app *,
    .aii-app *::before,
    .aii-app *::after {
        scroll-behavior: auto !important;
        transition: none !important;
        animation: none !important;
    }
}


/* v1.0.2 optional User Guide video */
.aii-guide-video {
    margin: 0 0 18px;
}

.aii-video-frame {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border: 1px solid var(--aii-border);
    border-radius: 14px;
    background: #0d2746;
    box-shadow: 0 8px 26px rgba(16,46,82,.08);
}

.aii-video-frame iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

/* v1.0.1 settings/login gate */
.aii-app.aii-login-required { max-width: 760px; margin: 24px auto; }
.aii-app.aii-login-required .aii-card { padding: 28px; text-align: center; }