.tool-label {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        font-weight: 600;
        color: var(--text-light);
        text-transform: uppercase;
        letter-spacing: 0.5px;
        margin-bottom: 6px;
    }
    .tool-input {
        padding: 10px 14px;
        border: 1px solid var(--border-light);
        border-radius: 8px;
        font-size: 14px;
        background: var(--bg-light);
        color: var(--text-dark);
        transition: border-color 0.2s;
    }
    .tool-input:focus {
        outline: none;
        border-color: var(--primary-light);
        box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    }
    .tool-select {
        padding: 10px 14px;
        border: 1px solid var(--border-light);
        border-radius: 8px;
        font-size: 14px;
        background: var(--bg-white);
        color: var(--text-dark);
        cursor: pointer;
        transition: border-color 0.2s;
    }
    .tool-select:focus {
        outline: none;
        border-color: var(--primary-light);
        box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    }
    .btn-tool {
        padding: 10px 20px;
        border: none;
        background: linear-gradient(135deg, #3b82f6, #8b5cf6);
        color: white;
        border-radius: 8px;
        font-size: 14px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.2s;
        display: inline-flex;
        align-items: center;
        gap: 8px;
    }
    .btn-tool:hover { opacity: 0.9; transform: translateY(-1px); }
    .btn-tool-outline {
        background: transparent;
        color: var(--primary);
        border: 1px solid var(--border-light);
    }
    .btn-tool-outline:hover { background: var(--bg-light); border-color: var(--primary-light); }
    .btn-copy {
        background: none;
        border: none;
        color: var(--primary-light);
        cursor: pointer;
        font-size: 12px;
        font-weight: 600;
        padding: 0;
    }
    .btn-copy:hover { color: var(--primary); }
    .tool-status {
        padding: 10px 16px;
        border-radius: 6px;
        font-size: 13px;
        margin-bottom: 12px;
        font-weight: 500;
    }
    .tool-status.success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
    .tool-status.error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

    /* Timezone Selector Grid */
    .tz-selector-grid {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        gap: 16px;
        align-items: end;
    }
    .swap-col {
        display: flex;
        align-items: center;
        padding-bottom: 4px;
    }
    .btn-swap {
        width: 40px;
        height: 40px;
        border: 1px solid var(--border-light);
        background: var(--bg-white);
        color: var(--primary);
        border-radius: 50%;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 14px;
        transition: all 0.2s;
    }
    .btn-swap:hover {
        background: var(--primary);
        color: white;
        border-color: var(--primary);
        transform: rotate(180deg);
    }

    /* Timezone Shortcuts */
    .tz-shortcuts {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
    }
    .btn-tz-shortcut {
        padding: 6px 12px;
        border: 1px solid var(--border-light);
        background: var(--bg-white);
        color: var(--text-dark);
        border-radius: 6px;
        font-size: 12px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.15s;
    }
    .btn-tz-shortcut:hover {
        border-color: var(--primary-light);
        color: var(--primary);
        background: rgba(59, 130, 246, 0.05);
    }

    /* Result Display */
    .result-grid {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        gap: 16px;
        align-items: center;
    }
    .result-card {
        padding: 20px;
        border-radius: 10px;
        text-align: center;
    }
    .result-from {
        background: var(--bg-light);
        border: 1px solid var(--border-light);
    }
    .result-to {
        background: rgba(59, 130, 246, 0.05);
        border: 1px solid rgba(59, 130, 246, 0.2);
    }
    .result-label {
        font-size: 12px;
        font-weight: 600;
        color: var(--text-light);
        text-transform: uppercase;
        letter-spacing: 0.5px;
        margin-bottom: 8px;
    }
    .result-time {
        font-size: 28px;
        font-weight: 700;
        color: var(--text-dark);
        font-family: 'SF Mono', 'Fira Code', monospace;
    }
    .result-date {
        font-size: 13px;
        color: var(--text-medium);
        margin-top: 4px;
    }
    .result-arrow {
        color: var(--primary-light);
        font-size: 20px;
    }

    .time-diff {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 12px 16px;
        border-radius: 8px;
        background: #eff6ff;
        color: #1e40af;
        font-size: 14px;
        font-weight: 500;
    }

    @media (max-width: 768px) {
        .tz-selector-grid {
            grid-template-columns: 1fr;
            gap: 12px;
        }
        .swap-col {
            justify-content: center;
            padding-bottom: 0;
        }
        .btn-swap {
            transform: rotate(90deg);
        }
        .btn-swap:hover {
            transform: rotate(270deg);
        }
        .result-grid {
            grid-template-columns: 1fr;
            gap: 12px;
        }
        .result-arrow {
            transform: rotate(90deg);
            text-align: center;
        }
        .result-time { font-size: 22px; }
    }