.due-container {
    max-width: min(1360px, 97vw);
    margin: 0 auto;
    padding: clamp(16px, 3vw, 28px);
}

.due-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.due-title {
    margin: 0;
    font-size: 34px;
    color: var(--text-primary);
}

.due-subtitle {
    margin: 6px 0 0;
    color: var(--text-secondary);
}

.due-toolbar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.due-control {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 10px;
    border: 1px solid var(--surface-border);
    background: var(--surface-elevated);
    color: var(--text-secondary);
    font-size: 12px;
}

.due-control select {
    border-radius: 8px;
    border: 1px solid var(--surface-border);
    background: var(--surface-base);
    color: var(--text-primary);
    padding: 4px 8px;
}

.due-toggle input {
    accent-color: var(--accent-primary);
}

.due-control-btn {
    padding: 6px 10px;
    border-radius: 10px;
    border: 1px solid var(--surface-border);
    background: var(--surface-hover);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 12px;
}

.due-summary {
    margin-top: 18px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
}

.due-summary-card {
    background: var(--surface-elevated);
    border: 1px solid var(--surface-border);
    border-radius: 12px;
    padding: 12px;
    box-shadow: var(--shadow-soft);
}

.due-summary-label {
    color: var(--text-secondary);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.due-summary-value {
    margin-top: 6px;
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
}

.due-summary-sub {
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

.due-progress {
    margin-top: 8px;
    height: 8px;
    border-radius: 999px;
    background: var(--surface-base);
    border: 1px solid var(--surface-border);
    overflow: hidden;
}

.due-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), color-mix(in srgb, var(--accent-primary), white 25%));
    transition: width 0.3s ease;
}

.due-section {
    margin-top: 20px;
    background: var(--surface-elevated);
    border: 1px solid var(--surface-border);
    border-radius: 14px;
    padding: 14px;
    box-shadow: var(--shadow-soft);
}

.due-pill-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.due-pill {
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid var(--surface-border);
    background: var(--surface-base);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
}

.due-pill.active {
    background: color-mix(in srgb, var(--accent-primary), transparent 80%);
    color: var(--text-primary);
    border-color: color-mix(in srgb, var(--accent-primary), transparent 55%);
}

.due-card-list {
    margin-top: 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.due-card {
    background: var(--surface-base);
    border: 1px solid var(--surface-border);
    border-radius: 12px;
    padding: 14px;
}

.due-card-question {
    font-weight: 600;
    color: var(--text-primary);
}

.due-card-answer {
    margin-top: 8px;
    color: var(--text-secondary);
    display: none;
}

.due-card-answer.show {
    display: block;
}

.due-actions {
    margin-top: 10px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.due-grade-btn {
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--surface-border);
    background: var(--surface-hover);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 13px;
}

.due-grade-btn.good {
    background: color-mix(in srgb, var(--accent-primary), transparent 70%);
}

.due-grade-btn.easy {
    background: color-mix(in srgb, var(--accent-primary), transparent 55%);
}

.due-footer {
    margin-top: 16px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.due-empty {
    color: var(--text-secondary);
    text-align: center;
    padding: 24px 10px;
}

@media (max-width: 900px) {
    .due-container {
        max-width: 100%;
        padding: 12px 10px calc(env(safe-area-inset-bottom, 0px) + 78px);
    }

    .due-header {
        align-items: flex-start;
        gap: 10px;
    }

    .due-title {
        font-size: 24px;
    }

    .due-subtitle {
        font-size: 13px;
        margin-top: 4px;
    }

    .due-summary {
        margin-top: 12px;
        display: flex;
        gap: 8px;
        overflow-x: auto;
        overflow-y: hidden;
        scroll-snap-type: x proximity;
        padding-bottom: 2px;
        -webkit-overflow-scrolling: touch;
    }

    .due-summary-card {
        min-width: 140px;
        padding: 10px;
        border-radius: 10px;
        scroll-snap-align: start;
    }

    .due-summary-label {
        font-size: 10px;
        letter-spacing: 0.05em;
    }

    .due-summary-value {
        margin-top: 4px;
        font-size: 18px;
    }

    .due-summary-sub {
        margin-top: 4px;
        font-size: 11px;
        line-height: 1.3;
    }

    .due-progress {
        margin-top: 6px;
        height: 6px;
    }

    .due-toolbar {
        position: fixed;
        left: 10px;
        right: 10px;
        bottom: calc(env(safe-area-inset-bottom, 0px) + 8px);
        z-index: 25;
        display: flex;
        flex-wrap: nowrap;
        gap: 8px;
        overflow-x: auto;
        padding: 8px;
        border-radius: 12px;
        border: 1px solid var(--surface-border);
        background: color-mix(in srgb, var(--surface-elevated), var(--surface-base) 24%);
        box-shadow: var(--shadow-elevated);
        -webkit-overflow-scrolling: touch;
    }

    .due-control {
        flex: 0 0 auto;
        min-height: 34px;
        padding: 6px 8px;
        font-size: 11px;
    }

    .due-control-btn {
        flex: 0 0 auto;
        min-height: 34px;
        padding: 6px 10px;
        font-size: 11px;
    }

    .due-section {
        margin-top: 14px;
        padding: 10px;
        border-radius: 12px;
    }
}