/* Header */
.header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    position: relative;
    z-index: 100;
}

.header-content {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.app-icon {
    width: 28px;
    height: 28px;
    color: var(--blue);
}

.app-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.tech-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tech-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.tech-btn svg {
    width: 16px;
    height: 16px;
}