.converter-grid {
    display: grid;
    grid-template-columns: minmax(280px, 1fr) 190px minmax(280px, 1fr);
    gap: 24px;
    margin-top: 32px;
    align-items: stretch;
}

.converter-column {
    display: flex;
}

.converter-card {
    background: var(--surface-elevated, #ffffff);
    border-radius: 16px;
    border: 1px solid rgba(9, 30, 66, 0.08);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.converter-card-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-start;
}

.converter-card-header h2 {
    font-size: 1.35rem;
    margin-bottom: 8px;
}

.converter-card-subtitle {
    margin: 0;
    color: var(--text-secondary, #5f6b7c);
    font-size: 0.95rem;
}

.converter-card-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-align: right;
    font-size: 0.85rem;
    color: var(--text-tertiary, #8c97a8);
    white-space: nowrap;
}

.converter-drop-zone {
    position: relative;
    border: 1px dashed rgba(93, 129, 255, 0.4);
    border-radius: 12px;
    background: rgba(93, 129, 255, 0.04);
    transition: border-color 0.2s ease, background 0.2s ease;
}

.converter-drop-zone.drag-over {
    border-color: rgba(93, 129, 255, 0.9);
    background: rgba(93, 129, 255, 0.1);
}

.converter-textarea {
    width: 100%;
    min-height: 360px;
    border: none;
    background: transparent;
    padding: 16px;
    font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
    font-size: 0.95rem;
    line-height: 1.55;
    resize: vertical;
    color: var(--text-primary, #1f2937);
}

.converter-textarea:focus {
    outline: none;
}

.converter-drop-hint {
    position: absolute;
    bottom: 12px;
    right: 16px;
    font-size: 0.85rem;
    color: var(--text-tertiary, #8c97a8);
}

.converter-action-bar {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.converter-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.converter-status {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary, #5f6b7c);
    background: rgba(15, 118, 110, 0.08);
    border-left: 3px solid rgba(15, 118, 110, 0.6);
    padding: 10px 14px;
    border-radius: 8px;
}

.converter-status.error {
    background: rgba(220, 38, 38, 0.08);
    border-left-color: rgba(220, 38, 38, 0.7);
    color: rgba(185, 28, 28, 0.95);
}

.converter-status.success {
    background: rgba(34, 197, 94, 0.12);
    border-left-color: rgba(22, 163, 74, 0.8);
    color: rgba(21, 128, 61, 0.95);
}

.btn-ghost {
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.25);
    color: #4f46e5;
}

.btn-ghost:hover {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.6);
    color: #4338ca;
}

.converter-middle {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 16px;
}

.converter-switch-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 18px 24px;
    border-radius: 12px;
    box-shadow: 0 12px 24px rgba(34, 197, 94, 0.2);
}

.converter-switch-icon {
    font-size: 1.6rem;
}

.converter-switch-text {
    font-size: 0.95rem;
}

.converter-difference {
    background: linear-gradient(135deg, #eef2ff 0%, #ebf8ff 100%);
    border-radius: 16px;
    padding: 20px;
    box-shadow: inset 0 0 0 1px rgba(59, 130, 246, 0.2);
    font-size: 0.95rem;
    color: #1e293b;
}

.converter-difference h3 {
    margin-top: 0;
    margin-bottom: 12px;
    font-size: 1.05rem;
    font-weight: 600;
}

.converter-difference ul {
    margin: 0;
    padding-left: 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.insight-grid {
    margin-top: 40px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.insight-card {
    background: var(--surface-elevated, #ffffff);
    border-radius: 14px;
    padding: 20px;
    box-shadow: 0 12px 30px rgba(148, 163, 184, 0.18);
    border: 1px solid rgba(226, 232, 240, 0.9);
}

.insight-card h3 {
    margin-top: 0;
    margin-bottom: 14px;
    font-size: 1.05rem;
    color: var(--text-primary, #1f2937);
}

.insight-card ul {
    margin: 0;
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    color: var(--text-secondary, #4b5563);
}

.insight-card li strong {
    color: var(--text-primary, #1f2937);
}

@media (max-width: 1024px) {
    .converter-grid {
        grid-template-columns: 1fr;
    }

    .converter-middle {
        order: -1;
        align-items: stretch;
    }

    .converter-switch-btn {
        width: 100%;
        justify-content: center;
        flex-direction: row;
    }
}

@media (max-width: 640px) {
    .converter-card {
        padding: 18px;
    }

    .converter-textarea {
        min-height: 280px;
        font-size: 0.9rem;
    }

    .converter-card-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .converter-card-meta {
        text-align: left;
    }

    .converter-action-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .converter-actions {
        width: 100%;
        justify-content: space-between;
    }

    .converter-actions .btn {
        flex: 1;
    }
}