.app-shell {
    width: min(1500px, 94%);
    margin: 0 auto;
    padding-bottom: 80px;
}

.topbar {
    padding: 24px 0;
}

.topbar-inner {

    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {

    display: flex;
    align-items: center;
    gap: 16px;
}

.brand-mark {

    width: 54px;
    height: 54px;

    border-radius: 16px;

    display: flex;
    align-items: center;
    justify-content: center;

    background:
        linear-gradient(135deg,
            #00d4ff,
            #00ffae);

    color: #041018;

    font-weight: 800;
    font-size: 1.1rem;
}

.brand-name {

    font-size: 1.3rem;
    font-weight: 700;
}

.brand-tag {

    color: var(--muted);
    font-size: .92rem;
}

.hero-panel {

    margin-top: 24px;

    padding: 48px;

    border-radius: 28px;

    background:
        linear-gradient(180deg,
            rgba(255, 255, 255, .03),
            rgba(255, 255, 255, .015));

    border: 1px solid var(--border);

    box-shadow: var(--shadow);
}

.hero-kicker {

    color: var(--cyan);

    font-size: .8rem;

    letter-spacing: .14em;

    text-transform: uppercase;

    margin-bottom: 16px;
}

.hero-panel h1 {

    margin: 0;

    font-size: clamp(2.8rem, 6vw, 5rem);

    line-height: .95;
}

.hero-description {

    max-width: 900px;

    margin-top: 20px;

    color: var(--muted);

    font-size: 1.1rem;
}

.stats-grid {

    display: grid;

    grid-template-columns:
        repeat(auto-fit, minmax(220px, 1fr));

    gap: 18px;

    margin-top: 28px;
}

.stat-card {

    background: var(--panel);

    border: 1px solid var(--border);

    border-radius: 22px;

    padding: 24px;

    box-shadow: var(--shadow);
}

.stat-label {

    color: var(--muted);

    font-size: .9rem;
}

.stat-value {

    margin-top: 10px;

    font-size: 2rem;

    font-weight: 800;
}

.search-panel {

    margin-top: 32px;

    padding: 24px;

    background: var(--panel);

    border-radius: 22px;

    border: 1px solid var(--border);
}

.search-row {

    display: flex;

    gap: 14px;

    flex-wrap: wrap;
}

.search-input {

    flex: 1;

    min-width: 280px;

    background: #0b1118;

    border: 1px solid var(--border);

    border-radius: 14px;

    padding: 14px 18px;

    color: white;
}

.sort-select {

    background: #0b1118;

    border: 1px solid var(--border);

    border-radius: 14px;

    padding: 14px;

    color: white;
}

.search-button {

    border: none;

    border-radius: 14px;

    padding: 14px 24px;

    font-weight: 700;

    cursor: pointer;

    background:
        linear-gradient(135deg,
            #00d4ff,
            #00ffae);

    color: #041018;
}

.pagination-panel {

    margin-top: 40px;
}

.pagination-inner {

    display: flex;

    align-items: center;

    justify-content: center;

    gap: 16px;
}

.page-button {

    padding: 12px 20px;

    border-radius: 14px;

    background: var(--panel);

    border: 1px solid var(--border);
}

.page-status {
    color: var(--muted);
}

@media (max-width: 900px) {

    .hero-panel {
        padding: 32px 24px;
    }

    .hero-panel h1 {
        font-size: 3rem;
    }

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

    .search-row {
        flex-direction: column;
    }

    .search-input,
    .sort-select,
    .search-button {
        width: 100%;
    }

    .pagination-inner {
        flex-wrap: wrap;
    }
}

.score-explain-panel {
    margin-top: 28px;
    padding: 32px;
    border-radius: 24px;
    background: var(--panel);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.score-explain-panel h2 {
    margin: 10px 0 24px;
    font-size: 1.7rem;
}

.score-explain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.score-explain-card {
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 20px;
}

.score-name {
    color: var(--cyan);
    font-weight: 800;
    margin-bottom: 10px;
}

.score-explain-card p {
    margin: 0;
    color: var(--muted);
    line-height: 1.6;
}