:root {
    --ink: #554c46;
    --muted: #7b746f;
    --paper: #fffdfa;
    --line: #f0dfcf;
    --orange: #ffad60;
    --orange-dark: #f57c00;
    --blue: #64c8dc;
    --green: #7fca82;
    --pink: #f48fb1;
    --purple: #b995d8;
    --shadow: 0 8px 18px rgba(128, 98, 67, 0.13);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: "UD デジタル 教科書体 N-R", "UD Digi Kyokasho N-R", "Helvetica Neue", Arial, Meiryo, sans-serif;
    background:
        linear-gradient(180deg, #e7f8ff 0%, #fff7ed 45%, #f3fbef 100%);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

button,
input {
    font: inherit;
}

.app-header {
    display: flex;
    align-items: center;
    gap: 18px;
    max-width: 980px;
    margin: 0 auto;
    padding: 18px 16px 8px;
}

.home-link,
.text-button {
    color: #7a5a33;
    background: #fff;
    border: 2px solid var(--line);
    border-radius: 999px;
    padding: 8px 14px;
    text-decoration: none;
    font-weight: 700;
    box-shadow: 0 3px 0 #e8cfb7;
    cursor: pointer;
}

.home-link:active,
.text-button:active,
.primary-button:active,
.secondary-button:active,
.user-chip:active,
.subject-card:active,
.category-card:active,
.choice-button:active {
    transform: translateY(2px);
    box-shadow: none;
}

.eyebrow {
    margin: 0 0 4px;
    color: var(--orange-dark);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

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

h1 {
    margin-bottom: 0;
    font-size: clamp(1.8rem, 6vw, 3rem);
    letter-spacing: 0;
}

h2 {
    margin-bottom: 0;
    font-size: 1.35rem;
    letter-spacing: 0;
}

.app-shell {
    width: min(980px, calc(100% - 24px));
    margin: 0 auto 32px;
}

.panel {
    background: rgba(255, 253, 250, 0.94);
    border: 3px solid #fff;
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 20px;
    margin-top: 16px;
}

.hidden {
    display: none !important;
}

.panel-heading {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 16px;
}

.panel-heading .text-button {
    align-self: flex-start;
    margin-bottom: 6px;
}

.user-list,
.subject-list,
.category-list,
.choices {
    display: grid;
    gap: 12px;
}

.user-list {
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
}

.user-chip,
.subject-card,
.category-card,
.choice-button,
.primary-button,
.secondary-button,
.new-user-form button {
    border: 0;
    cursor: pointer;
    font-weight: 800;
    color: var(--ink);
    box-shadow: 0 5px 0 rgba(124, 91, 58, 0.18);
}

.user-chip {
    min-height: 56px;
    border-radius: 16px;
    background: #fff6df;
    border: 2px solid #ffd18c;
}

.user-chip.active {
    background: #ffe2ad;
    border-color: var(--orange);
}

.empty-users {
    color: var(--muted);
    background: #f8f1ea;
    border-radius: 14px;
    padding: 14px;
}

.new-user-form {
    display: flex;
    gap: 8px;
    margin-top: 14px;
}

.new-user-form input {
    min-width: 0;
    flex: 1;
    border: 2px solid var(--line);
    border-radius: 14px;
    padding: 12px;
    background: #fff;
}

.new-user-form button,
.primary-button {
    background: var(--orange);
    color: #fff;
    border-radius: 14px;
    padding: 12px 18px;
}

.subject-list {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.subject-card {
    text-align: left;
    min-height: 120px;
    padding: 18px;
    border-radius: 18px;
    background: #fff;
    border: 3px solid #e8f5e9;
}

.subject-card.math {
    border-color: #c4eef5;
}

.subject-card.japanese {
    border-color: #ffd7c8;
}

.subject-icon {
    display: block;
    font-size: 2.2rem;
    margin-bottom: 8px;
}

.subject-card strong {
    display: block;
    font-size: 1.25rem;
    margin-bottom: 6px;
}

.subject-card span:last-child {
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.5;
}

.category-list {
    grid-template-columns: repeat(auto-fit, minmax(245px, 1fr));
}

.category-card {
    text-align: left;
    background: #fff;
    border: 3px solid #f0eadf;
    border-radius: 18px;
    padding: 16px;
}

.category-card h3 {
    margin: 0 0 10px;
    color: #5e4a39;
    font-size: 1.15rem;
    letter-spacing: 0;
}

.mastery-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
}

.mastery-score {
    color: var(--orange-dark);
    font-size: 2.1rem;
    font-weight: 900;
}

.mastery-score small {
    font-size: 0.9rem;
}

.mastery-label {
    background: #eef8e9;
    color: #3f7a43;
    border-radius: 999px;
    padding: 5px 10px;
    font-size: 0.85rem;
    font-weight: 800;
}

.meter {
    height: 12px;
    background: #f2ede8;
    border-radius: 999px;
    overflow: hidden;
    margin: 10px 0 12px;
}

.meter-fill {
    height: 100%;
    width: 0;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--blue), var(--green), var(--orange));
}

.category-meta {
    display: grid;
    gap: 4px;
    color: var(--muted);
    font-size: 0.86rem;
    line-height: 1.45;
}

.test-panel {
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
}

.test-topbar,
.test-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.progress-copy {
    color: var(--orange-dark);
    font-size: 1.4rem;
    font-weight: 900;
}

.progress-track {
    height: 14px;
    border-radius: 999px;
    background: #f4e9df;
    margin: 14px 0;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--blue), var(--purple), var(--pink));
    transition: width 0.25s ease;
}

.test-status {
    color: var(--muted);
    font-weight: 800;
}

.question-box {
    display: grid;
    place-items: center;
    min-height: 150px;
    margin: 18px 0;
    padding: 18px;
    border-radius: 18px;
    background: #fff8ef;
    border: 3px dashed #ffd18c;
    text-align: center;
}

.question-box p {
    margin: 0;
    font-size: clamp(1.6rem, 7vw, 3.2rem);
    font-weight: 900;
    line-height: 1.35;
    letter-spacing: 0;
}

.choices {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.choice-button {
    min-height: 78px;
    padding: 14px;
    border-radius: 18px;
    background: #fff;
    border: 3px solid #d9edf5;
    font-size: clamp(1.05rem, 4vw, 1.45rem);
    line-height: 1.25;
}

.choice-button.correct {
    background: #e8f5e9;
    border-color: var(--green);
}

.choice-button.wrong {
    background: #ffebee;
    border-color: #ef9a9a;
}

.result-panel {
    max-width: 780px;
    margin-left: auto;
    margin-right: auto;
}

.result-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.result-tile {
    background: #fff;
    border: 2px solid #f0eadf;
    border-radius: 16px;
    padding: 14px;
    text-align: center;
}

.result-tile strong {
    display: block;
    color: var(--orange-dark);
    font-size: 2rem;
    line-height: 1.1;
}

.result-tile span {
    color: var(--muted);
    font-size: 0.85rem;
    font-weight: 800;
}

.result-message {
    margin: 14px 0 0;
    padding: 14px;
    border-radius: 16px;
    background: #edf8ff;
    color: #37566b;
    font-weight: 800;
    line-height: 1.6;
}

.result-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
}

.primary-button,
.secondary-button {
    min-height: 52px;
}

.secondary-button {
    background: #fff;
    border: 2px solid var(--line);
    border-radius: 14px;
    padding: 12px 18px;
}

.primary-button:disabled {
    opacity: 0.65;
    cursor: default;
    box-shadow: none;
}

@media (max-width: 620px) {
    .app-header {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
    }

    .panel {
        padding: 16px;
        border-radius: 14px;
    }

    .new-user-form,
    .result-actions {
        flex-direction: column;
    }

    .choices,
    .result-summary {
        grid-template-columns: 1fr;
    }
}