.font-tool {
    display: grid;
    grid-template-columns: minmax(0, 360px) minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
}

.control-panel {
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.08) 0%, rgba(29, 161, 242, 0.08) 100%);
    border: 1px solid rgba(66, 133, 244, 0.18);
    border-radius: 16px;
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
}

.control-header h2 {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 0.35rem;
}

.control-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.control-group {
    margin-top: 1.5rem;
}

.control-label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.sample-input {
    width: 100%;
    padding: 0.85rem 1rem;
    border-radius: 12px;
    border: 1px solid rgba(66, 133, 244, 0.25);
    background-color: rgba(255, 255, 255, 0.9);
    resize: vertical;
    line-height: 1.6;
    font-size: 0.95rem;
    transition: var(--transition);
}

.sample-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.15);
}

.input-hint {
    margin-top: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.control-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.25rem;
    margin-top: 1.75rem;
}

.control-item {
    background-color: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(66, 133, 244, 0.12);
    border-radius: 14px;
    padding: 1rem;
    box-shadow: var(--shadow-sm);
}

.control-item input[type="range"] {
    width: 100%;
    margin-top: 0.75rem;
}

.toggle-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.75rem;
}

.switch {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.55rem 0.9rem;
    border-radius: 999px;
    background-color: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(66, 133, 244, 0.15);
    font-size: 0.95rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

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

.switch:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.control-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.75rem;
}

.control-actions .btn {
    flex: 1 1 180px;
    justify-content: center;
}

.font-preview-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.preview-header h2 {
    font-size: 1.4rem;
    color: var(--primary-color);
}

.preview-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.font-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.font-card {
    background: linear-gradient(155deg, rgba(248, 250, 255, 0.94) 0%, rgba(232, 240, 255, 0.94) 100%);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    position: relative;
}

.font-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.font-card-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.75rem;
}

.font-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.font-tag {
    font-size: 0.8rem;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    background-color: rgba(66, 133, 244, 0.12);
    color: var(--primary-color);
    font-weight: 600;
}

.font-preview-text {
    font-size: 1.1rem;
    color: var(--text-primary);
    transition: var(--transition);
    word-break: break-all;
}

.font-meta {
    display: grid;
    gap: 0.75rem;
}

.font-meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    font-size: 0.9rem;
}

.font-meta-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.font-stack {
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 8px;
    padding: 0.35rem 0.6rem;
    border: 1px solid rgba(148, 163, 184, 0.3);
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Monaco, monospace;
    font-size: 0.82rem;
    color: var(--text-primary);
}

.copy-font-button {
    margin-left: auto;
    border: none;
    background-color: var(--primary-color);
    color: #fff;
    padding: 0.4rem 0.75rem;
    border-radius: 999px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
}

.copy-font-button:hover {
    background-color: var(--primary-hover);
}

.copy-font-button.copied {
    background-color: var(--success-color);
}

.copy-font-button.failed {
    background-color: var(--error-color);
}

.usage-tips {
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.08) 0%, rgba(52, 211, 153, 0.08) 100%);
    border: 1px solid rgba(66, 133, 244, 0.2);
}

.usage-tips h2 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.tips-list {
    list-style: none;
    display: grid;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.tips-list strong {
    color: var(--text-primary);
    font-weight: 600;
}

@media (max-width: 1100px) {
    .font-tool {
        grid-template-columns: 1fr;
    }

    .control-actions .btn {
        flex: 1 1 140px;
    }
}

@media (max-width: 768px) {
    .font-tool {
        padding: 1.25rem;
    }

    .control-panel {
        padding: 1.35rem;
    }

    .font-preview-grid {
        grid-template-columns: 1fr;
    }

    .font-card {
        padding: 1.25rem;
    }
}